Section C: Factory Mutual Applications - Notifier NFS2-3030 Operation Manual

Section C: Factory Mutual Applications

The FMM-4-20:
The FMM-4-20 is intended for use in intelligent, two-wire systems, allowing Control Panels to
interface and monitor two-wire or three-wire sensors with a 4-20 mA signal.
NOTE: Factory Mutual (FM) Approval does not include or imply Approval of gas detector heads
or other apparatus to which the FMM-4-20 may be connected. In order to maintain an FM
Approved system, the sensor to which the FMM-4-20 is connected must also be FM approved.
The FMM-4-20 monitor can be used in FlashScan mode only. CLIP mode operation will generate a
trouble message at the panel.
NOTE: The FMM-4-20 is compatible for display at the NCA-2 and ONYXWorks.
The following is a list of troubles that can occur on the FMM-4-20. For further information and
suggested action to evaluate these troubles, refer to Section 2.3 on page 27.
Trouble:
DEVICE INHIBIT
DUAL ADDRESS
INVALID RESPONSE
MISMAT HDWE TYPE
MOD EXT PWR LOSS
NO ANSWER
NO THRESHOLDS PROGRAMMED No threshold values have been programmed for the FMM-
OPEN CIRCUIT
OVER RANGE
SHORT CIRCUIT
TROUBLE1
TROUBLE2
UNDER RANGE
NOTE: If the FMM-4-20 is monitoring a sensor that supports the Device Inhibit condition, it is
recommended that the user program one of the 4-20 mA thresholds to support this condition.
86
Description:
The FMM-4-20 is in a self-calibration state.
There is more than one device with the same SLC address.
The device has returned a response to the panel that the
panel did not expect.
The programming information in the panel's database does
not match the device at the address specified.
The module has lost external power.
The device is not responding to the poll.
4-20.
The module has an open circuit on it's supervised wiring.
The FMM-4-20's 4-20 mA sensor has exceeded 20 mA.
The module has a short circuit on it's supervised wiring.
An FMM-4-20 module threshold trouble as determined in
point programming.
An FMM-4-20 module threshold trouble as determined in
point programming.
The FMM-4-20's 4-20 mA sensor has dropped below 4
mA.
NFS2-3030 Operations Manual — P/N 52546:N1 06/20//2014