GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

ROOM PRESSURE MONITOR

RPC SERIES

PRODUCT DESCRIPTION

The RPC Series room pressure monitor/transmitter

is used to measure differential pressure in the

range of 0.125 to 1”WC or 30 to 250 Pa and

provide either an analog or BACnet® compatible

signal to a building automation system.

It combines precision high sensitivity silicon

sensing capabilities and the latest ASIC

technology to substantially reduce offset errors

due to changes in temperature, stability to warm

up, long term instability and position sensitivity.

It features an LCD to display the pressure value,

several bi-directional pressure ranges and field-

selectable output signal types for the most flexible

application. The device has an on-board auto-

zero function. It features an alarm output with an

adjustable trip point for high and low alarm levels,

an on-board buzzer, a remote buzzer output with

silence switch and a flashing alarm LED.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The RPC series can be mounted directly to a single

gang electrical box or directly to a wall. If the

remote buzzer option is used, simply mount it

directly a standard electrical box.

A terminal block connection is provided for

connection to the Building Automation System.

There are several wiring configurations depending

on the options selected.

PRESSURE RANGES

±1”, ±0.5”, ±0.25”, ±0.125”WC

±250, ±125, ±60, ±30 Pa

ACCURACY

±1% F.S.O. (±2% F.S.O. for 0.125”WC and 30 Pa ranges)

STABILITY

±1% FS max (1 year)

THERMAL EFFECTS

<±3.5% FS max, 5 to 50°C (41 to 122°F)

RESPONSE TIME

0 to 60 seconds (menu selectable)

PROOF PRESSURE

100”WC (24.9 kPa)

BURST PRESSURE

200”WC (49.8 kPa)

OPERATING CONDITIONS

0 to 60°C (32 to 140°F), 10 to 90 %RH non-condensing

STORAGE TEMPERATURE

-40 to 70°C (-40 to 158°F)

MEDIA COMPATIBILITY

Dry air and inert gas

ZERO ADJUSTMENT

Pushbutton auto-zero

POWER SUPPLY

24 Vac/dc, ±10%

POWER CONSUMPTION

70 mA max with alarms on (80 mA with BACnet® option)

OUTPUT SIGNAL

4-20 mA (3 wire), 0-5 Vdc or 0-10 Vdc (3 wire), field selectable

OUTPUT DRIVE

Current: 750Ω max

Voltage: 2000Ω min

INPUT VOLTAGE EFFECT

Negligible over specified operating range

PROTECTION CIRCUITRY

Reverse voltage protected and output limited

WIRING CONNECTIONS

Screw terminal block (14 to 22 AWG)

PRESSURE CONNECTIONS

Ports for 1/16” ID tubing (1/8” ID Adapters included)

ENCLOSURE

White ABS, IP30 (NEMA 1)

DIMENSIONS

84mm W x 119mm H x 29mm D (3.3” x 4.7” x 1.15”)

WEIGHT

115g (4 oz)

COUNTRY OF ORIGIN

Canada

LCD DISPLAY

Size: 38.1mm W x 16.5mm H (1.5” x 0.65”)

Digit Height: 11.43mm (0.45”)

Symbols: “WC, Pa

Backlight: Enable/disable via menu

ALARM FUNCTION

Relay Output: N.O. contact, 2 Amps @ 120 Vac or 30 Vdc

Relay Trip Point: Upper and lower trip levels adjustable over the pressure range

Relay Delay: 0 to 10 minutes (menu selectable)

Visual Indication: Setpoint step size is 0.5°C or 1.0°F

Audible Indication: On-board buzzer, 85 db on high range (menu selectable)

Buzzer Output: Output to control remote audible alarm (Part Number AA-1)

OPTIONAL BACnet® COMMUNICATIONS Communications: 2 wires RS-485, BACnet® MS/TP protocol

Baud Rate: Locally set to 9600, 19200, 38400, or 76800

MAC Address Range: Locally set to 0-127 (factory default is 3)

SPECIFICATIONS

58mm

2.3”

82.6mm

3.25”

29mm

1.15”

119mm

4.7”

84mm

3.3”