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4.4 Wiring
WARNING!
All electrical wiring must be performed by a qualified electrician or trained personnel. Make sure the line pow-
er is off. Switch OFF all input and output circuit breakers on the UPS unit before making any electrical connections.
4.4.1 Wiring the UPS
1. Connect the temperature sensor to the UPS unit (Battery Temperature connector
). The other end is connected to the
batteries later in the procedure.
2. Refer to Figure 1 & 2, connect the following ports if used.
• USB Connector
• RS-232 Connector
• Dry contacts
• Program input
• Ethernet connector (RJ-45)
• External FAN Connector
4.4.2 Wiring the Manual Bypass Switch to the UPS
Wire the MBS to the UPS according to the schematic shown in Figure 6.
1. The MBS is pre-wired with 2 cables marked as “UPS IN” and “UPS OUT”. Connect
these cables from MBS to the respective connectors on the UPS.
2. Connect the AC input wires to the AC input terminal blocks on the MBS. Ensure
proper polarity (Line, Neutral and Ground to the respective terminal).
3. Connect AC output wires to the AC output terminal blocks on the MBS. Ensure
proper polarity (Line, Neutral and Ground to the respective terminal).
Suggested cable requirement for AC wires:
Model
Gauge
Cable (mm²)
Torque Value
AC-UPS-48-2000
10 AWG
6
1.2Nm
AC-UPS-48-1500
10 AWG
6
1.2Nm
AC-UPS-48-1200
10 AWG
6
1.2Nm
AC-UPS-24-700
10 AWG
6
1.2Nm
4.4.3 Wiring External Batteries
The UPS supports 24V or 48V DC battery (depending on model). Connect all battery strings as shown in Figure 7. It’s sug-
gested to connect at least 100AH capacity battery.
Figure 7: Battery Connection Chart
48V DC 24V DC
Recommended battery cable size:
Model
Typical Amperage
Wire Size
Cable mm²
AC-UPS-48-2000
40A
1*10 AWG
6
AC-UPS-48-1500
32A
1*10 AWG
6
AC-UPS-48-1200
30A
1*10 AWG
6
AC-UPS-24-700
35A
1*10 AWG
6
Figure 6: Wiring the MBS to the UP
