16
AT-MGS-402 User Manual
ON
2 Stop Bits
60
ON
ON
OFF
OFF
9600 Bits Per Second
70
ON
ON
ON
ON
19200 Bits Per Second
80
OFF
OFF
OFF
NOTE:
All of the above settings must match the BMS system to work correctly.
4.2.2 Relay Setup
Additional hardware configuration.
4.2.2.1 Form C Relays
The (3) form C relays that are included in the AT-MGS-402
(fault, low alarm, high alarm)
can be configured to
be fail safe
(if power is lost on the relay it will be set to its fault or alarm state until power is restored)
. The fail safe
mode can be configured for each of the individual relays and is done using SW1 settings 1, 2 and 3. If fail
safe mode is desirable for the form C relays change settings to ON.
4.2.2.2 Multiple MGS Gas Sensors
Switch 2 setting 3 is enabled if a second AT-MGS-410 sensor will be connected to the AT-MGS-402
(one sensor is
default).
4.2.2.3 Analog Outputs
The (2) analog outputs can be configured to 4-20mA, 1-5V or 2-10V depending on preference. When
configured both analog outputs will be configured the same
(i.e., both 4-20mA, both 1-5V or both 2-10V)
. Using
SW2 settings 4 and 5 set the desired configuration.
Condition
4-20 mA
1-5V
2-10V
Offline, Warmup
3 mA
0.75V
1.5V
Fault
1 mA
0V
0V
Under-range
3.8 mA
0.95V
1.9V