User guide

AN24 & AN28 Annunciators Instruction Manual

Relay Fail-Safe Programming Example

The following is an example of relay fail-safe setup. Relays 1 and 2 are

changed from the default settings of normal operation to fail-safe

operation.

1. Press and hold ACK and RESET for 3 seconds. When all

LEDs cycle, release.

2. Press RESET within 3 seconds of release while LEDs cycle.

All LEDs blink in unison.

3. Press RESET again within 3 seconds while LEDs blink

4. LED 1 will be off indicating

normal operation of relay 1.

LEDs 2 through 4 will be dim.

5. Press Reset to change LED 1

from off to on, setting relay 1

for fail-safe operation.

6. Press ACK to confirm the

setting for relay 1and proceed

to program relay 2.

7. Press RESET to change LED 2

from off to on, setting relay 2

for fail-safe operation.

8. Press ACK to confirm the setting for relay 2.

9. Press and hold ACK for 5 seconds to return to normal

operation.

Note: LEDs 3 and 4 are used for the silence pushbutton enable/disable

option (see page 27) and no lock-in option (see page 27)