MAMAC SYSTEMS PR-274 Technical Information

FOR ADDITIONAL INFORMATION
SEE PR-274/275 DATA SHEET
SPECIFICATIONS
Accuracy*: ± 1% FS
Overpressure: 10 PSID
Supply Voltage: 12-40 VDC
12-35 VAC (VDC output
units only)
Supply Current: VDC Units - 10 mA max.
mA Units - 20 mA max.
Enclosure: 18 Ga C. R. Steel NEMA 4 (IP-65) or Panel Mount Chassis
Finish: Baked on enamel-PMS2GR88B
Compensated Temp Range: 25ºF-150ºF (-4ºC-65ºC)
T. C. Error: ±0.0125%/ºF (.02%/ºC)
Operating Temp Range: 0ºF-175ºF (-18ºC-80ºC)
Media Compatibility: Clean dry air or any inert gas
Environmental:10-90%RH Non-Condensing
Termination: Unpluggable screw terminal block
Wire Size: 12 Ga max.
Load Impedance: 1.6K ohms max. at 40 VDC (mA output units)
1K ohms min. (VDC output units)
Weight: Enclosure 1.0 lbs. (.45 kg)
Panel Mount: 0.5lbs. (.25 kg)
*Includes non-linearity, hysteresis and non-repeatability
PACKAGING RANGE
274 (enclosure) R1 ("wc) 0 TO 0.10 / -0.05 TO + 0.05
275 (panel mount) R2 ("wc) 0 TO 1.0 / 0 TO 0.5 / 0 TO 0.25/
-0.5 TO + 0.5 / -0.25 TO + 0.25/
-0.125 TO + 0.125
R3 ("wc) 0 TO 5.0 / 0 TO 2.5 / 0 TO 1.25/
-2.5 TO +2.5 / -1.25 TO + 1.25/
-0.625 TO + 0.625
R4 ("wc) 0 TO 30 / 0 TO 15 / 0 TO 7.5/
-15.0 TO + 15.0 / -7.5 TO +7.5/
-3.75 TO + 3.75
R5 (pa) 0 TO 25 / -12.5 TO + 12.5
R6 (pa) 0 TO 250 / 0 TO 125 / 0 TO 62.5/
-125 TO + 125 / -62.5 TO + 62.5/
-31.25 TO + 31.25
R7 (pa) 0 TO 1250 / 0 TO 625 / 0 TO 312.5/
-625 TO + 625 / -312.5 TO + 312.5/
-156.25 TO + 156.25
R8 (pa) 0 TO 7500 / 0 TO 3750 / 0 TO 1875/
-3750 TO + 3750 / -1875 TO + 1875/
-937.5 TO + 937.5
Enclosure Mount
OUTPUT
mA (4-20 mA 2 wire)
VDC (0-5 VDC or
0-10 VDC field selectable)
INSTALLATION
Inspection Inspect the package for damage. If damaged, notify the
appropriate carrier immediately. If undamaged, open
the package and inspect the device for obvious damage.
Return damaged products.
Requirements • Tools (not provided)
- Digital Volt-ohm Meter (DVM)
- Appropriate screwdriver for mounting screws
- Appropriate drill and drill bit for mounting screws
• Appropriate accessories
• Two #8 self-tapping mounting screws (not provided)
• Training: Installer must be a qualified, experienced
technician
Warning:
• Disconnect power supply before installation to prevent
electrical shock and equipment damage.
• Make all connections in accordance with the job wiring
diagram, and in accordance with national and local
electrical codes. Use copper conductors only.
!
Caution:
• Use electrostatic discharge precautions (e.g., use of
wrist straps) during installation and wiring to prevent
equipment damage.
• Avoid locations where severe shock or vibration,
excessive moisture or corrosive fumes are present.
NEMA Type 4 housings are intended for outdoor use
primarily to provide a degree of protection against
wind-blown dust, rain, and hose-directed water.
• Do not exceed ratings of the device.
Mounting The PR-274/275 must be mounted as indicated by the arrows
on the enclosure. Refer to Figure-7 for mounting dimensions.
1. Remove the transducer cover using a Phillips head
screwdriver.
2. Select the mounting location.
3. Mount transducer on a vertical surface with two #8 self-
tapping screws (not provided).
4. Pull wires through bottom of enclosure and make necessary
connections.
5. Replace cover and make pneumatic connections.
Wiring Use maximum 12 AWG wire for wiring terminals. Use flexible
1/4" O.D., 5/32" I.D. tubing for the high and low pressure
connections. Refer to Figures 1, 2, 3, & 4 for wiring information
and Figures 5 & 6 for jumper designations.
Wiring PR-274/275 Units with mA Output
PR-274/275 pressure transducers are 4-20 mA output units
powered with a 12-40 VDC supply.
The following describes the proper wiring of these pressure
transducers with mA output:
1. Remove the blue terminal block by carefully pulling it off
the circuit board.
2. Locate the [+] and [-] terminal markings on the board.
3. Attach the supply voltage to the [+] lead.
4. Connect the 4-20 mA output ([-] terminal) to the controller's
input terminal.
5. Ensure that the power supply common is attached to the
common bus of the controller.
6. Re-insert the terminal block to the circuit board and apply
power to the unit.
7. Check for the appropriate output signal using a DVM set
on DC milliamps connected in series with the [-] terminal.
Model PR-274/275
Technical Information
TI.274/275-01
Low Pressure Transducer