Operation; Output Signals; Table 4: Output Signals - GasTech F-Guard-IR3-H2 User Manual

4. Operation

After power up, the LED on the front of the detector flashes Yellow indicating the startup routine has
begun. After approximately 30 seconds, if the startup is successful, the LED turns green, the 0-20mA
output goes to 4mA and the fault relay is closed.
Detector configuration settings can be changed as described in section 3.
To restart the detector, cycle the power.

Output Signals

The detector has the following output signals:
Current output (0–20mA) with HART 7

Relays (Fault, Alarm and Auxiliary)

Modbus RS-485

Tri-color status LED

Output
Startup
Fault
BIT Fault
Dirty Window Warning
Normal
Pre Alarm
Fire Alarm
Notes:
1 – 3mA when "Enable dirty window warning 0-20mA" enabled. 4mA when "Enable dirty window warning 0-20mA" disabled.
2– Closed when "Aux Relay" set to "Dirty Window Warning".
3 – 16mA when "Enable Pre-Alarm 0-20mA" enabled. 4mA when "Enable Pre-Alarm 0-20mA" disabled.
4– Closed when "Aux Relay" set to "pre-alarm".
For more information & technical support:
F-Guard IR3-H2 User Manual
T 4: O
ABLE UTPUT
0 – 20mA Fault Relay
1mA
1mA
2mA
3mA ( )
1
4mA
16mA ( )
3
20mA
info@gastech.com
S
IGNALS
State
Alarm Relay
(NO) NO
Open Open
Open Open
Open Open
Closed Open
Closed Open
Closed Open
Closed Closed
76-M-6010-02-02
Aux Relay LED
(NO
Open Flashing
Yellow
Open Flashing
Yellow
Open Yellow
Closed ( ) Green
2
Open Green
Closed ( ) Flashing red
4
Closed Red
25