Spectrex 20/20MPI - Commercial IR3 Flame Detector - Manual (Page 27)

TM 20/20MPI, Rev (D) September 2013
Output Signals 15
Table 7: Detector State with Output Signals
Detector State Color
LED Flashing
LED Alarm
Relay
1
Fault
Relay
1
0-20 mA
Output
2
Normal Green 1 Hz Off On 4 mA
Warning Red 2 Hz Off On 16 mA
Alarm 3 Red Steady On On 20 mA
Latch 4 Red Steady On On 20 mA
BIT Fault 5 Yellow 4 Hz Off Off 2 mA
Warning at BIT
Fault
Red 2 Hz Off Off 16 mA
Alarm at BIT Fault Red Steady On Off 20 mA
Fault Yellow 4 Hz Off Off 0 mA
Notes:
1 Alarm and Fault Relay refer to model 20/20MPI-R.
2 0-20 mA Output refers to model 20/20MPI-M.
3 The alarm outputs are activated as long as the alarm conditions are
present
4 The alarm state can be latched (optional) according to a programmable
function
5 The detector is in its BIT FAULT state until it has passed a successful
BIT, and stops approximately 3 seconds after the fire is no longer
detected.
4.2.1 Optional Latching
The detector has an optional latched alarm output capability, which operates
according to the programmable function. If selected, upon detection of a
fire, the detection signal is latched until manually reset (disconnecting the
power supply). Latching affects the ALARM RELAY, 0-20 mA output, and the
ALARM LED.
4.2.2 Built-In-Test
When the programmable function Alarm BIT at YES is successful, the
0-20 mA output provides 20 mA for 3 sec.