OPTI-UPS MD120L - Manual (Page 17)

Chapter 1 Installation
14
1.6.2 Cable Connection
警告 危 险
Note
The operations described in this section must be performed by authorized electricians or qualified
technical personnel. If you have any difficulties, do not hesitate to contact our Customer Service &
Support department .
After the equipment has been finally positioned and secured, connect the power cables as
described in the following procedures:
1. Verify that all the external input distribution switches of the UPS are completely opened and the
UPS internal maintenance bypass switch is opened. Attach necessary warning signs to these
switches to prevent unauthorized operation.
2. Open the back door of the cabinet, remove the cover and then the input and output terminal,
battery terminal and earth terminal are visible.
3. Connect the input earth wire to input earth terminal. Please note: the earth wire shall be connected
in accordance with related local or state regulation
4. For common bypass and rectifier inputs, connect the AC input supply cables to the UPS input
terminals ( Main input A-B-C-N ), and connect the output loaded cable to the UPS output terminals
(Output A-B-C-N) and tighten the connections to 13 Nm (M8 Bolt). ENSURE CORRECT PHASE
ROTATION.
5. Connect the battery cables between the UPS battery terminals and battery switch. ENSURE
CORRECT PHASE ROTATION.
警告 危 险
Warning-Hazardous battery terminal voltage of 400Vdc
Ensure the correct polarity connection between the battery terminals and the UPS terminals: Positive
terminal to positive terminal, negative terminal to negative terminal, and disconnect one or more than
one cable between every two layers of batteries. Do not connect the cables and close the battery
circuit breakers before getting the approval from the commissioning engineer.
6. Re-install all the protective covers.
1.7 Control and Communication Cabling
As shown in fig 1-12, the front panel of the bypass module will provide dry contact interface
(J2~J10), communication interface (RS232, 485 and SNMP card interface), as well as LBS interface.
干接点接口
SNMP卡接口
RS485接口
RS232接口 LBS接口
Fig 1-12 Dry contact interface and communication interface
Dry contact
interface
SNMP card port
LBS port RS232 port
RS485 port