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5. Interface and Communication
5.2 X2 - Remote EPO Input Port
The UPS is equipped with Emergency Power Off (EPO) Function that can be operated by a remote contact assigned by the users. EPO is
defaulted to Normally Closed (N.C.).
Note:
The open contact activates EPO function.
Users may change the setting to Normally Open via the LCD display.
X2 is the remote EPO input port. This port is shown in Figure 5.3 and described in
Table 5.2
.
Figure 5.3 Remote EPO Input Port
Table 5.2 Description of Remote EPO Port
EPO Logic Setting
Position
Description
N.C
X2.1 and X2.2
EPO activated when Opened X2.1 and X2.2
N.O
X2.1 and X2.2
EPO activated when Shorted X2.1 and X2.2
If EPO Logic setting is Normally Closed (N.C), the EPO will be triggered when pins 1 and pin 2 of X1 are opened. Otherwise, EPO Logic
setting is Normal Opened (N.O). The EPO will be triggered when pins 1 and pin 2 of X2 are closed.
Notes:
1. EPO function shuts down the rectifiers, chargers, 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 Closed (N.C).
3. A user-supplied REPO button must be latching type and in a normally closed position.
5.3 Other Communication Interface
5.3.1 RS-232 Port
The RS-232 port is located on the panel behind the front door. The RS-232 port provides service support when upgrading the UPS
software to a different revision.
5.3.2 USB Port
This port is for service purpose only.
Note:
The RS232 and USB ports WILL NOT work simultaneously.
5.3.3. SNMP Slot for Monitoring Using WEBCARDLX (Optional cards)
Install an optional WEBCARDLX card in this slot to remotely monitor and control the UPS via network. The RELAYCARDSV may also
be inserted in this slot to provide dry contact I/P and O/P signals and temperature sensors communication functionality. Refer to the
WEBCARDLX and RELAYCARDSV manuals for further details.
Note:
Only one card may be used at a time.
