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EPO in Single Systems
Connect the EPO cable using one of the following four wiring congurations.
Note: Use only 1-1½ mm² copper wire for the connection of the Emergency Power Off
(EPO) and other optional equipment.
Note: The UPS must be connected to either a dry contact or a 24 VDC EPO (Emergency
Power Off) switch.
Note: The external EPO +24 VDC, 1500 mA circuit can be supplied through other vendors.
1. Dry Contacts Normally Open: EPO is
activated when pin 1 is connected to pins 3 and
5. Connections: 2-4-6, 3-5, and 1 (Normally
Open).
2. +24 V Normally Open: EPO is activated
when an isolated SELV 24 VDC voltage is
supplied on pin 1 with reference to pin 2.
Connections: 3-5 and 4-6.
3. Dry Contacts Normally Closed: EPO is
activated when a connection from pin 3 to 5 is
opened. Connections: 4-6.
4. +24 V Normally Closed: EPO is activated
when a SELV 24 VDC voltage is removed
from pin 3 with reference to pin 4.
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MGE™ Galaxy™ 3500 10-30 kVA 208/220 V Single and Parallel Installation
990-1957C-001