Tripp Lite Power Supply DRY Contact Interface, Remote Emergency Power OFF EPO, Open, Close

Communications (continued)

DRY CONTACT INTERFACE

Pin assignment:

This female DB9 contact-closure port allows your UPS to send contact-closure signals to indicate that it is on battery back-up mode and if its batteries are running low. The port can also receive a remote shutdown signal.

DRY CONTACT INTERFACE TABLE
UPS Operating Mode	Pin 8,3	Pin 1,3
Normal	OPEN	OPEN
Back Up	CLOSE	*
Low Battery	CLOSE	CLOSE	+- 3 V

* Inactive: may be in either state.

REMOTE EMERGENCY POWER OFF (EPO)

This optional feature is only for those applications which require connection to a facility's Emergency Power Off (EPO) circuit. When the UPS System is connected to this circuit, it enables emergency shutdown of the output. Using a user-supplied cable, connect the UPS System's EPO port to a user- supplied remote switch. The EPO port is not a phone line surge suppressor; do not connect a phone line to this port. The pin assignments for the EPO port are shown in the following diagram. Note: if there is a short between pins 2 and 3, 2 and 5, 4 and 5, or 3 and 4, the UPS system will power off. To reset from a Remote Emergency Power Off Shutdown, make sure there is AC line input power present, the Input Breakers are ON, and the shutdown- signal has been removed from the EPO circuit. Press the front panel “OFF” Button for 2 to 3 seconds (until a beep is heard); this will place the UPS System in “Bypass Mode.” Then, press the “ON” Button for one second. The UPS will re-start if AC line power is present.

Pin assignment:

X 1

X

2

3

4

5

6

11