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1. RS232 Port – Port is used by Maintenance Service engineer to enable updates to internal firmware
of the UPS System. Not for Customer Use
2. USB Port – Communication port for Customer to connect monitoring Software directly to local PC,
provides Alarms and functional monitoring.
3. EPO – EPO port is NC in normal Operation. Breaking this NC loop forces the UPS Inverter to
disconnect the output to the load.
4. Parallel Share Current Port – Used when multiple UPS systems are connected in Parallel
5. Parallel Port – Used when multiple UPS systems are connected in Parallel
6. INTELLIGENT SLOT – One Slot provided can hold either an SNMP card or Dry port card.
a. SNMP CARD – OPTIONAL (Further details in Section 7.1)
b. DRY PORT RELAY CARD – OPTIONAL (Further details in Section 7.3)
18. SERVICE START – Allows UPS to be started directly from the battery with no incoming mains
supplied.
19. EMBS (External Maintenance Bypass Switch) – Port is NC in Normal Operation.
The EMBS port can be linked to an external Maintenance bypass switch to ensure an interlock is
connected to the UPS internal static switch. When installed and the EMBS is closed the Inverter is
shutdown and the static transfer switch connects the load directly to the incoming mains supply.
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