User Manual
cGas Ammonia Vent Line Transmitter - Addendum Rev. B | 2022.09
6 © 2022 All rights reserved. Data subject to change without notice.
ELECTRICAL
Power Requirement
16 - 30 VDC, 3 W, Class 2
12 - 27 VAC, 50-60 Hz, 3 VA, Class 2
24V recommended. Refer to Section 6.7 Wiring Connections
Wiring
CGAS-A-VLT model
VDC (or ground referenced AC): 3-conductor 18 AWG (or
larger) shielded, stranded within conduit
VAC 4-conductor shielded 18 AWG stranded within conduit
Wiring
CGAS-D-VLT model
VDC or VAC (ground referenced) 4-conductor shielded 16 AWG
stranded within conduit, network wiring (daisy-chain)
Fuses Automatic resetting thermal
INPUT/OUTPUT
Analog Output
CGAS-A-VLT model
One Linear 4 - 20 mA output, signals gas reading
RH & Temperature
(Option -RHT)
User selectable units (
o
C or
o
F) with user selectable display or
hide readings
Digital Output
CGAS-D-VLT model
User congurable in the eld, BACnet® MS/TP (version 1 rev
14) RS-485 or Modbus® RTU (version 1.1b3) RS-485
Relay (Option -RLY) Optional SPDT dry contact relay, rated 30 volts @ 2 amps
ENVIRONMENTAL
Operating Temperature
0°C to 40°C / 32°F to 104°F (standard)
-40°C to 40°C / -40°F to 104°F (with Option -LT)
Operating Humidity 15 - 90% RH non-condensing
Pollution Degree Degree 2
Altitude below 2,000 m
CERTIFICATION
Model: CGAS-A-VLT-NH3-S or CGAS-D-VLT-NH3-S
S/N: CGASA1807B00010
Rating: 16-30 VDC, 3W, Class 2
12-27 VAC, 50-60 Hz, 3VA, Class 2
CERTIFIED FOR ELECTRIC SHOCK & ELECTRICAL FIRE HAZARD ONLY. LA CERTIFICATION
ACNOR COUVRE UNIQUEMENT LES RISQUES DE CHOC ELECTRIQUE ET D’INCENDIE
D’ORIGINE ELECTRIQUE.