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INM MTL SUM5 Rev 7
DRAFT - 09 June 2021 DRAFT - 09 June 2021
4 AUX POWER
Aux Power – PS2
• Aux power is connected to terminal AUX - PS2 - (~+VE) and (~–VE) as
indicated above.
• On the standard version the supply input is universal capable of accepting
85-264VAC 50/60 Hz or 88 to 300VDC.
• As an option, which must be specied at the time of order, the aux supply can be
19-72VDC.
• A watchdog relay, WD, is tted as standard providing a volt free changeover contact
for use with 3rd party devices to indicate loss or primary power or internal failure.
• All PSU’s need to be protected with an external fuse rated at 1AT or
equivalent MCB
CAUTION
Power supplies must be fused externally with a 1AT fuse or suitable MCB.
WARNING !
Hazardous voltages may exist on the rear panel connections when
connectors are removed. Take care not to touch any exposed parts and
isolate the supply before carrying out any work
WARNING !
GPA, GPB, WD, Channel repeat relays should only be connected to
customer secondary circuits separated from mains supply circuits by
means of a transformer.
For hazardous voltage above 60Vdc (SELV) isolate the supply before
carrying out any work
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