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4
Relay Operation
This section provides the basic operation of the relays in the ESRS unit.
4.1 Relay Contact Specification
Item
Contact
Contact Current
Contact Voltage VAC (Maximum allowable)
N/C – Normally Closed Contact
N/O – Normally Open Contact
COM – Common Terminal
4.2
The Relay Energized State
When the ESRS is operational and in the standby mode, all the relays should
be in the energized state.
The N/C terminal is open.
The N/O and the COM terminals are connected.
4.3
The Relay De-Energized State
When the ESRS is operational and is in the shutdown state, all the relays
should be in the de-energized state.
The N/C and the COM terminals are connected.
The N/O terminal is open.
4.4 Relay 20 Second Reset
Automatic reset timer functions are optional in the ESRS. Please contact Sea-
Fire Marine for additional instruction regarding the setting of the relay 20-
second reset timer.
5
INSTALLATION CHECK
5.1 Check that all the machinery wires installed in the ESRS terminal blocks are
correct and secure as described above and from the machinery's installation
manuals.
5.2 Apply power to the ESRS. The green POWER LED on the ESRS Unit and Display
Panel should illuminate.
5.3 Start vessel engine(s) and all other machinery connected to / controlled by the
ESRS.
5.4 Press the "
intensity on the panel and the ESRS Unit shall change. Press again to return to
full brightness.
5.5 Open the "PS1" circuit loop. The relays should de-energize, all connected
machinery should shut down, the alarm should sound and the red "PS1" LED on
Page 7 of 12
Table 2: Relay Contact Specification
" Dimmer Button on the Display Panel and the Green Power LED
Value
SPDT (1 Form C)
10A NC / 20A NO
277VAC
123-567 Rev. A
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