Xtreme Power Conversion Corporation
M90U-80 & 140 User’s Manual
Page 66
Uninterruptible Power Supply
Table 5-1:
Description of remote EPO port
EPO Logic Setting
Position
Description
N.C
X1.1 & X1.2
EPO is activated when X1.1 & X1.2
opened
N.O
X1.1 & X1.2
EPO is activated when X1.1 & X1.2
shortened
If EPO Logic setting is Normal Closed (N.C), EPO is triggered when pins 1 and 2 of X1 are opened. Otherwise, EPO
Logic setting is Normal Opened (N.O). EPO is triggered when pins 1 and 2 of X1 are closed.
Note:
1. EPO function activates shutdown of the rectifiers, inverters and static transfer switch. But it does not
internally disconnect the input power supply.
2. The default setting of the EPO function logic is Normal Opened (N.O).
5.1.2 X4-Maintenance Bypass Switch State Port
X4 is the maintenance bypass switch port. The port is shown in Figure 5-3 and described in Table 5-2.
Figure 5-3 Maintenance Bypass Switch State port
Table 5-2:
Description of Maintenance Bypass Switch State port
Name
Position
Description
Maintain Bypass Pin1
X4.1
Maintenance bypass switch state
Maintain Bypass Pin 2
X4.2
Maintenance bypass switch state
X4.3
Future use
X4.4
Future use
5.1.3 X6-Battery Cabinet Temperature Detection Port
There is battery cabinet temperature detection function in the UPS. The temperature of UPS battery cabinet can
be detected through the external battery cabinet temperature detection sensor. Communication between the
UPS and Battery temperature detection board was through I2C communication protocol. X6 is the battery cabinet
temperature detection port. This option requires an optional temperature probe. The port is shown in Figure 5-4
and described in Table 5-3.