ESP Safety IPES-IR/UV, Operating Manual

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Page 9 of 29 Revised 10/21/2012
Table 4 ‐ 1: Determining LED Conditions
After completing all installation steps, refer to the illustration and LED indicator table below to determine LED conditions.
N IPES status Fire relay dry contacts condition Fault
relay dry
contacts
condition
Output
signal, mA
Indicator LED condition
Normally closed Normally open
1 No power supply
voltage
Closed open open 0 Off
2 Fault or optical
interference (dust)
Closed open open 2 Every 25 to 45 seconds two LEDs blink with the following
frequencies: the first LED blinks 5 times with a period of 0.5 seconds,
the second one blinks 3 times with a period of 1 second. Both LEDs
are off during the pause between blinking.
3 Normal (no faults or
fires during operation)
Closed open closed 4 When no radiation is present:
Every 25 to 40 seconds the two LEDs blink alternately 3 times with a
period of 1 second. Both LEDs are off during the pause between
blinking.
When only IR radiation is present:
The IR LED indicator (see figure 4 ‐ 2) will be on continuously, the UV
LED indicator will be off.
When only UV radiation is present:
The UV LED indicator (see figure 4 ‐ 2) will be on continuously, the IR
LED indicator will be off.
4 Fire, no Fault Open closed closed 18 Both LEDs light continuously.
5 Fire, with Fault Open closed open 18 Both LEDs light continuously.
6 Test mode (magnetic
collar is on)
Closed open open 2 Magnetic collar is on. fire relay is blocked.