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简单介绍：
Description: Large Display Process/Rate Totalizer
Inputs: 4-20 mA, 1-5 V, 0-5 V, 0-10 V
Display: 2.3" (57.3 mm) Red LED 4½ Digits + extra zero
Case: NEMA 4X Aluminum
Power: 115/230 VAC or 22-28 VDC
详情介绍：
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GENERAL FEATURESThe PD650, PD655 and PD656 are Large Display Process Meters with flow rate, totalizer and batch control capabilities. Each accepts the common process signals such as 4-20 mA, 0-5 VDC, 1-5 VDC and 0-10 VDC and displays these signals in engineering units on a large, high efficiency, 4½digit red LED display. All units also provide two isolated 24 V power supplies to drive both the input and output loops. Options include up to 4 relays for alarms or batch controlling, as well as an isolated 4-20 mA transmitter output. |
KEY FEATURES
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Single Button ScalingSingle button scaling means that these meters can be completely programmed using only one button. Simply press the ENTER button to initiate the automatic menu scan. When the desired menu appears press the ENTER button again. Once in a menu, press the ENTER button when the display reads the desired value. To exit setup & programming press the ACK (Acknowledge) button while displaying any of the main menus. It's that simple!
These meters may be scaled without a signal source or calibrated with a signal source. |
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Stand Alone Scaling (Internal or External)
menu functions
Menu titles always appear
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Universal Process Inputs & Linearization
The Large Display Process Meters accept both voltage and current inputs and can be scaled for virtually any engineering unit. In Addition, these meters feature automatic square root extraction, programmable exponent for weirs and flumes and 11-point custom calibration. Display volume in a round horizontal tank. |
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Flow Features
The Large Display Process Meters may be used to display flow rate and total from a wide variety of flow meters. For flow rate applications, these meters feature programmable time base of seconds, minutes, hours, or days, a 4½ digit plus extra zero display, and low-flow cutoff capability. For total applications, these meters feature a full six-digit display, a programmable totalizer conversion factor and the ability to automatically or manually toggle back and forth between rate and total display. New features include programmable exponent for weirs and flumes.OPTIONS
The PD655 and PD656 Meters can be equipped with 2 or 4 SPDT relays and 4-20 mA output options. Any relay can be assigned to the rate or the total. The 4-20 mA output on provides signal isolation and can be scaled for a wide variety of applications.Rate Relays
The PD655 and PD656 Meters can be equipped with 2 or 4 SPDT relays and 4-20 mA output options. Any relay can be assigned to the rate or the total. The 4-20 mA output on provides signal isolation and can be scaled for a wide variety of applications.
Total Relays
The PD655 and PD656 Meters can be equipped with 2 or 4 SPDT relays and 4-20 mA output options. Any relay can be assigned to the rate or the total. The 4-20 mA output on provides signal isolation and can be scaled for a wide variety of applications.
4-20 mA Output Option
The PD655 and PD656 Meters can be equipped with 2 or 4 SPDT relays and 4-20 mA output options. Any relay can be assigned to the rate or the total. The 4-20 mA output on provides signal isolation and can be scaled for a wide variety of applications.PUMP ALTERNATION CONTROL
Precision Digital products are used in many applications for pump control because they are simple to use, provide local display of level, power the transmitter, and can be used for pump alternation. Most Precision Digital products can have up to four relays so two can be used to control the pumps and two can be use for high and low alarm. The pump alternation feature is particularly useful because it extends the life of the pump and reduces maintenance costs. |
 Relay #1 turns the main pump on at 6000 gallons and turns off at 1000 gallons. |
 With the Pump Alternation feature activated, the next time the level reaches 6000 gallons, relay #2 trips and starts the backup pump. |
 The backup pump is not able to keep up, so when the level reaches 7000 gallons, relay #1 trips and starts the main pump. |
 Relay #3 trips the High Level Alarm at 7500 gallons and resets at 6900 gallons.= |
 Relay #4 trips the Low Level Alarm at 795 gallons and resets at 750 gallons. |
PD655 & PD656 option Card Pin-Outs
| Jumper | Pin | Function |
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| J1 |  |
1 | Transmitter + | ||
| 2 | Transmitter - | ||||
| J3 |  |
1 | Relay #1 Common | ||
| 2 | Relay #1 NC | ||||
| 3 | Relay #1 NO | ||||
| 4 | Relay #2 Common | ||||
| 5 | Relay #2 NC | ||||
| 6 | Relay #2 NO | ||||
| J4 | |
1 | Relay #3 Common | ||
| 2 | Relay #3 NC | ||||
| 3 | Relay #3 NO | ||||
| 4 | Relay #4 Common | ||||
| 5 | Relay #4 NC | ||||
| 6 | Relay #4 NO | ||||
Manual Batch Control Operation
| The valve and External Switch KEY Legend is as shown: |
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| Both valves are open to fill the barrel. Meter displays barrel contents. |  |
| Full-flow valve #1 is closed and restricted-flow valve #2 'dribbles' in the remaining 5 gallons. |  |
| When the total reaches 55.00, relay 2 trips and closes the restricted-flow valve #2. Display freezes on 55.00 and relays 1 and 2 will not reset until external switch is pushed. |
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| Both valves are still closed and a new barrel is positioned. Meter displays previous barrel's counter until external reset button is pushed |  |
| Operator presses reset switch to reset total. Total goes to zero. Both relays reset causing both valves to open and begin filling the new barrel. |
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| Both valves are open to fill the barrel. Meter displays barrel contents. |
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Explosion-Proof Control Stations for the PD656
The Explosion-proof Control Stations can be used to control the PD656 while in operation in a hazardous area. Control stations may be ordered with one, two or three push buttons. The buttons can be labeled ENTER, ACK and RESET. External connections are available at the J1 connector on the Main Board.Front Panel LED Indicators
| LED | During Programming | During Operation |
| 1 | Alarm 1 | Alarm 1 |
| 2 | Alarm 2 | Alarm 2 |
| 3 | Alarm 3 | Alarm 3 |
| 4 | Alarm 4 | Alarm 4 |
| S | Set Point indicator | None |
| R | Reset Point Indicator | None |
| 4 | 4 mA Output Indicator | None |
| 20 | 20 mA Output Indicator | None |
| R | Rate Indicator | Rate |
Front Panel LEDs for PD655
Magnetic Reed Switch Operation
The PD656 has two magnetic reed switches located above The ENTER and ACK buttons. The reed switches allow the user to program and operate the meter without having to remove the enclosure cover.
OVERALL DIMENSIONS
Wall Mounting
Panel Mounting
PD650 Panel Mounting Kit - PDA6504
- Allowable panel thickness: 0.06 - 0.25 (1.5 - 6.4). Longer bracket screws may be used for panel thickness up to 0.5 (12.7).
- Mounting space required: 7 x 17.5 x 4 (178 x 445 x 102) (H x W x D). Meter cover extends 0.8 (20) - X from the surface of the panel, where X equals the thickness of the panel.
- This panel mounting kit is not intended to provide waterproof protection to the panel.
- All dimensions are in inches and millimeters (mm).
PD655 Panel Mounting Kit - PDA6554
- Mounting brackets require 0.8 (20) clearance on either top or side of meter for installation.
- Tolerance for panel cutout dimensions are 0.01/-0.00(+0.3/-0.0).
- Panel mounting kits are not intended to provide waterproof protection to the panel.
- All dimensions are in inches and millimeters (mm).
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.PD650 NEMA 4X 2.3" Red LED
Display: 2.3" (57.3 mm) red LED, 4½digits, F or C can be selected on PD757 to indicate degrees Fahrenheit or Celsius.Enclosure: Die-cast aluminum, NEMA 4X, IP66/IP67 Corrosion resistant, 0.1% max copper content, color: gray (RAL 7001) polyester powder paint. Four holes for ½" conduit provided at base, 3 plugs provided.
Mounting: Enclosure contains four ¼" (6.4 mm) holes for wall-mounting. Panel mounting kit available.
Overall Dimensions: 4.9" x 14.3" x 3.2" (125 x 362 x 81 mm)
Weight: 7.0 lb (3.2 kg)
PD655 NEMA 4X 1.0" Red LED
Display: 1.0" (25.4 mm) red LED, 4½ digits, F or C can be selected on PD755 to indicate degrees Fahrenheit or Celsius.
Enclosure: Impact-resistant glass-filled polycarbonate, NEMA 4X, IP67 (IEC 529), color: gray (RAL 7035). Two holes for ½" conduit provided at base.
Mounting: Enclosure contains four holes for wall-mounting. Panel mounting and 2" pipe mounting kits available.
Overall Dimensions: 6.7" x 5.5" x 3.7" (170 x 140 x 95 mm)
Weight: 3.8 lb (1.73 kg)
PD656 Explosion-Proof 0.8" Red LED
Display: 0.8" (20.3 mm) red LED, 4½ digits, F or C can be selected on PD756 to indicate Fahrenheit or Celsius.Enclosure: Explosion-proof sand-cast aluminum with glass window, 0.3% max copper content, NEMA 4, 7, & 9, IP66. UL Classified & CSA Certified Class I Groups C & D, Class II Groups E, F & G, Class III hazardous outdoor (Type 4) locations. Two ¾" NPT holes provided at opposite sides. Up to four holes can be provided for an additional charge.
Mounting: Enclosure contains four 7/16" (11.1 mm) holes for wall-mounting. A 2" pipe mounting kit is available.
Overall Dimensions: 8.0" x 8.0" x 5.7" (203 x 203 x 145 mm)
Weight: 14.6 lb (6.6 kg)
General
Alarm Points: Four, any combination of high or low alarmsAlarm Point Deadband: 0-100% FS, user selectable
Alarm Status Indication: Front panel LED
External Programming: The Enter button function scan be controlled externally by wiring a switch across terminals EN and CM.
Non-Volatile Memory: Settings stored for a minimum of 10 years.
Normal Mode Rejection: 64 dB at 50/60 Hz
Power Options: AC power: 115 or 230 VAC (field select) ±10%, 50/60 Hz, 12 VA. DC power: 22-28 VDC; 12 W maximum.
Isolation: AC powered: 1500 V; DC powered: 500 V
Connections: Removable screw terminals accept 12 to 22 AWG
Warranty: 2 years parts & labor
Extended Warranty: 1 or 2 years
Basic Meter Specifications
Inputs: Field selectable: 4-20 mA, 0-20 mA, 0-5 V, 1-5 V, 0-10 VDisplay: 6 digits, red LED, -19,999(0) to 29,999(0) with selectable extra zero. Total display: 0 to 999,999.
Decimal Point: Process/rate: 2.9999, 29.999, 299.99, 2999.9 or 299990. Total: 9.99999, 99.9999, 999.999, 9999.99, 99999.9, 999999. Rate and total decimal points are independent.
Linear Input Accuracy: ±0.05% FS ±1 count
Root Function Accuracy: ±0.1% FS ±2 counts
Programmable Exponent: From 1.0001 to 2.9999
Multi-Point Linearization: 2 to 11 points
Calibration: May be scaled using internal calibration (
) or calibrated by applying an external calibration signal (
). To scale inputs such as 0-5 V, 1-5 V, or 0-10 V without applying a signal it is necessary to first complete an Initial Calibration.Calibration Range: User programmable over entire range of meter
| Input Range |
Minimum Span Between 1 & Input 2 |
| 0-5 V | 0.16 V |
| 0-10 V | 0.32 V |
| 4-20 mA | 1.60 mA |
| Input Range | ..... | Minimum Span |
| 4-20 mA | ..... | (1.6 mA / (Number of points -1)) |
| 0-5 V | ..... | (0.16 V / (Number of points -1)) |
| 0-10 V | ..... | (0.32 V / (Number of points -1)) |
e.g. Minimum span for an 11-point, 4-20 mA calibration is 0.16 mA between inputs.
Input Impedance: Voltage ranges: greater than 300k Ω; current ranges: 100 Ω
Transmitter Supply: Two isolated transmitter supplies, 24 VDC ±5% @ 20 mA each, regulated.
Maximum loop resistance: 1200 Ω
Optional Transmitter Supply: One 18 VDC (nominal) @ 200 mA max; unregulated power supply can be provided instead of the two 24 VDC supplies (see Price List for modification number).
Max (Display Peak): Captures the maximum or peak process/rate and displays it via the front panel ENTER button (
)Max Indication: Front panel flashing "R" LED
Lockout: Jumper JP1 labeled "LOCK" restricts modification of programmed settings.
Operating Temperature: -20 to 65°C
Storage Temperature: -40 to 85°C
Relative Humidity: 0 to 90% non-condensing
Rate/Totalizer/Batch Controller Features
Rate Display Indication: LED labeled "R" in lower right illuminates when meter is displaying rate or process input.Alternating Display: Display may be programmed to alternate between rate and total every 10 seconds.
Low-Flow Cutoff: Any input below the low-flow cutoff value will result in a display of zero. May be set from 1 count to 100% FS, user selectable. To disable low-flow cutoff, program cutoff value to zero. Totalizer is based on rate display; inputs below the low-flow cutoff value will not affect the totalizer.
Total Display: 0 to 999,999, automatic lead zero blanking
Total Decimal Point: May be set in any of the following positions: 9.99999, 99.9999, 999.999, 9999.99, 99999.9, 999999. Total decimal point is independent of process/rate decimal point.
Time Base: Seconds, minutes, hours, or days
Total Conversion Factor: Programmable from 0.00001 to 59999
Totalizer: Calculates total based on rate and field programmable multiplier to display total in engineering units. Total is stored in non-volatile memory.
Totalizer Rollover: Totalizer rolls over when total exceeds 999,999. Relay status reflects the display value.
Totalizer Presets: Up to four, user selectable under Setup menu. Any set point can be assigned to total and may be programmed anywhere in the range of the meter. Relays assigned to total trip when total reaches the preset value and reset when total is reset to zero or when acknowledged manually. Can be programmed so when the highest preset value is reached the total automatically resets to zero.
Preset Offset: Relays that are assigned to total can be programmed to trip at any point below the next relay's preset value. If preset offset mode is selected the corresponding relay will always trip at a programmed offset value before the next relay trips.
Example: Set point 1 and 2 are set up for total, with Offset selected (under set point 2). If the preset offset is set at 10, (during Set Points programming for set point 1), then relay 1 will trip 10 counts before relay 2.
Programmable Delay on Release: If the meter is programmed to reset total to zero automatically when the highest preset is reached, there will be a delay before the total relays are reset. This delay can be programmed between 1 and 999 seconds.
Priority Batch Programming: This feature allows the user to quickly change preset values without going into the main menu by holding the ENTER button for more than 3 seconds.
Total Reset: Via front panel ENTER button, external contact closure, or automatically via user selectable preset value.
Total Reset Lockout: Meter may be programmed
Rating: 2 or 4 Form C (SPDT); rated 2 A @ 30 VDC or 2 A @ 250 VAC resistive load; 1/14 HP @ 125/250 VAC inductive
Assign to Process/Rate or Total: Any relay may be assigned to process/rate or total (process/rate meters).
Built-in Suppression: Each relay contact is protected by a built-in suppressor (snubber) to prolong the life of the relays and provide a degree of protection against electrical noise caused by inductive loads. Suppressors value: 0.01 ;µF/470 Ω, 250 VAC.
Deadband: 0-100% FS, user selectable
High or Low Alarm: User may program any alarm for high or low
Relay Operation: Latching or non-latching
Fail-Safe Operation: Relay coils are energized in non-alarm condition. In case of power failure, relays will go to alarm state. Fail-safe operation may be disabled, by removing jumper J5 located on the options board.
Auto Initialization: When power is applied, relays assigned to total will reflect the state of the accumulated Total value in memory. Relays assigned to process/rate or temperature will reflect the state of the input to the meter.
Relays Reset: User select via jumper array and
menu Total Relays Reset (process/rate meters):
- When total is reset to zero, if set up for external total reset.
- After delay has elapsed, if set up for internal total reset.
- Manual any time, if set up for external total reset. Manual reset resets all manually resettable relays.
Relays assigned to process/rate or temperature may be programmed to reset in any of the following ways:
- Automatic reset when the input passes the reset point.
- Manual reset at any time (via user supplied external contact closure at terminals AK and CM or front panel ACK button). Manual reset resets all manually resettable relays.
- Automatic plus manual reset at any time. Relays will automatically reset when input passes the reset point. Relays can also be manually reset at any time (via user supplied external contact closure at terminals AK and CM or front panel ACK button). Manual reset resets all manually resettable relays.
- Manual reset only after alarm condition corrected. Relays can be manually reset only after alarm condition has been corrected (via user supplied external contact closure at terminals AK and CM or front panel ACK button). Manual reset resets all manually resettable relays.
Isolated 4-20 mA Transmitter Output
Scaling Range: Anywhere in range of meter, 501 counts minimum span for process/rate meter; reverse scaling allowed.Accuracy: ±0.1% FS ±0.004 mA
Output Loop Resistance:
| Loop Resistance | ||
| Power supply | Minimum | Maximum |
| 24 VDC | 10Ω | 600Ω |
| 35 VDC (external) | 600Ω | 1000Ω |
Isolation: 500 V input-to-output or input/output-to-24 VDC supply
External Loop Power Supply: 35 VDC maximum
The PD650, PD655, and PD656 are ideal for loops that consist of a transmitter, a digital meter, and a DCS or computer because they can provide isolated power to drive both the input and output loops.
Batch Control with Varying Batch Sizes
To simplify batch control applications with varying batch sizes, use one or more switches to control the relay outputs. The switch allows the operator to disable the process when changing presets in the meter and then enable the process after all the changes have been made and the process is ready to resume. The switch serves as a "Stop/Ready" control.Disclaimer
The Information contained in this document is subject to change without notice. Precision Digital Corporation makes no representations or warranties with respect to the contents hereof, and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose.
ORDERING INFORMATIONProducts |
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| Model | Description | ||||
| PD650-2-34 | Large Display Process Meter; 2 Relays; Powered from 24 VDC |  |
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| PD650-2-35 | Large Display Process Meter; 4-20 mA Output; Powered from 24 VDC | |
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| PD650-2-36 | Large Display Process Meter; 2 Relays + 4-20 mA Output; Powered from 24 VDC | |
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| PD650-2-37 | Large Display Process Meter; 4 Relays; Powered from 24 VDC | |
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| PD650-2-38 | Large Display Process Meter; 4 Relays + 4-20 mA Output; Powered from 24 VDC | |
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| PD650-2-N | Large Display Process Meter; No Options; Powered from 24 VDC | |
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| PD650-34 | Large Display Process Meter; 2 Relays; Powered from 115/230 VAC | |
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| PD650-35 | Large Display Process Meter; 4-20 mA Output; Powered from 115/230 VAC | |
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| PD650-36 | Large Display Process Meter; 2 Relays + 4-20 mA Output; Powered from 115/230 VAC | |
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| PD650-37 | Large Display Process Meter; 4 Relays; Powered from 115/230 VAC | |
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| PD650-38 | Large Display Process Meter; 4 Relays + 4-20 mA Output; Powered from 115/230 VAC | |
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| PD650-N | Large Display Process Meter; No Options; Powered from 115/230 | |
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PD650 Accessories |
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| Model | Description | ||||
| PDA6504 | Panel Mounting Kit for PD650 | |
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| PDX6901 | Suppressor (snubber): 0.01µF/470Ω, | |
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Products |
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| Model | Description | ||||
| PD655-2-44 | Large Display Process Meter; 2 Relays; Powered from 24 VDC | |
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| PD655-2-45 | Large Display Process Meter; 4-20 mA Output; Powered from 24 VDC | |
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| PD655-2-46 | Large Display Process Meter; 2 Relays + 4-20 mA; Powered from 24 VDC | |
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| PD655-2-47 | Large Display Process Meter; 4 Relays; Powered from 24 VDC | |
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| PD655-2-48 | Large Display Process Meter; 4 Relays + 4-20 mA Output; Powered from 24 VDC | |
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| PD655-2-N | Large Display Process Meter; No Options; Powered from 24 VDC | |
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| PD655-44 | Large Display Process Meter; 2 Relays; Powered from 115/230 VAC | |
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| PD655-45 | Large Display Process Meter; 4-20 mA Output; Powered from 115/230 VAC | |
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| PD655-46 | Large Display Process Meter; 2 Relays + 4-20 mA Output; Powered from 115/230 VAC | |
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| PD655-47 | Large Display Process Meter; 4 Relays; Powered from 115/230 VAC | |
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| PD655-48 | Large Display Process Meter; 4 Relays + 4-20 mA Output; Powered from 115/230 VAC | |
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| PD655-N | Large Display Process Meter; No Options; Powered from 115/230 VAC | |
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PD655 Accessories |
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| Model | Description | ||||
| PDA6554 | Panel Mounting Kit for PD655 | |
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| PDA6545 | Zinc Plated Steel 4 Hole Pipe Mounting Kit | |
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| PDA6545-SS | Stainless Steel Plated 4 Hole Pipe Mounting Kit | |
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| PDX6901 | Suppressor (snubber): 0.01µF/470Ω, | |
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Products |
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| Model | Description | ||||
| PD656-2-44 | Large Display Process Meter; 2 Relays; Powered from 24 VDC | |
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| PD656-2-45 | Large Display Process Meter; 4-20 mA Output; Powered from 24 VDC | |
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| PD656-2-46 | Large Display Process Meter; 2 Relays + 4-20 mA Output; Powered from 24 VDC | |
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| PD656-2-47 | Large Display Process Meter; 4 Relays; Powered from 24 VDC | |
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| PD656-2-48 | Large Display Process Meter; 4 Relays + 4-20 mA Output; Powered from 24 VDC | |
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| PD656-2-N | Large Display Process Meter; No Options; Powered from 24 VDC | |
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| PD656-44 | Large Display Process Meter; 2 Relays; Powered from 115/230 VAC | |
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| PD656-45 | Large Display Process Meter; 4-20 mA Output; Powered from 115/230 VAC | |
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| PD656-46 | Large Display Process Meter; 2 Relays + 4-20 mA Output; Powered from 115/230 VAC | |
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| PD656-47 | Large Display Process Meter; 4 Relays; Powered from 115/230 VAC | |
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| PD656-48 | Large Display Process Meter; 4 Relays + 4-20 mA Output; Powered from 115/230 VAC | |
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| PD656-N | Large Display Process Meter; No Options; Powered from 115/230 VAC | |
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PD656 Accessories |
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| Model | Description | ||||
| PDA2451-A | Explosion-Proof Control Station 1 Button Control Station: ACK | |
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| PDA2451-E | Explosion-Proof Control Station 1 Button Control Station: ENTER | |
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| PDA2451-R | Explosion-Proof Control Station 1 Button Control Station: RESET | |
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| PDA2452-EA | Explosion-Proof Control Station 2 Buttons Control Station: ENTER & ACK | |
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| PDA2452-ER | Explosion-Proof Control Station 2 Buttons Control Station: ENTER & RESET | |
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| PDA2453-EAR | Explosion-Proof Control Station 3-Button Control Station: ENTER, ACK, RESET | |
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| PDA6545 | Zinc Plated Steel 4 Hole Pipe Mounting Kit | |
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| PDA6545-SS | Stainless Steel Plated 4 Hole Pipe Mounting Kit | |
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| PDA-MAG | Magnet Assembly for PDA656 & PD698 | |
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| PDX6901 | Suppressor (snubber): 0.01µF/470Ω, | |
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