Instruction manual

2. Preparation for Installation
84
2.3.4 Electrical Power Equipment for -48 V DC (Power Redundancy
Models)
(1) DC Power Supply Cable
The power redundancy models contain no accessory power supply cables. Use the power supply cable specified below
to connect the device to -48 V DC.
Table 2-12 DC Power Supply Cable Specifications
(2) Ground Cable
Make sure to use the ground cable supplied with the device..
A cable is shipped whose terminal for the electrical power equipment is unprocessed. The specifications of the cable for
the electrical power equipment are shown in Figure 2-4 Ground Cable Specifications (for Electrical Power
Equipment). Fit the cable end properly with terminals or by some other means to connect to your electrical power
equipment.
Figure 2-4 Ground Cable Specifications (for Electrical Power Equipment)
(1) Ground (green/yellow)
Cable Type
Cable Specifications
Number of Core
Wires
AWG No.
Margin to peel the jacket (on the
device side)
DC power supply cable 2 16 8 to 10 mm
A trained engineer or maintenance staff should attach or detach the DC power supply
cable. The terminals of DC power supply cable are for connections. Wrong handling of
the DC power supply cable can cause a fire or electric shock.
Prior to attaching or detaching the DC power supply cable, turn off the circuit breaker of
the electrical power equipment. Otherwise, an electric shock might result.
Peel the DC power supply cable jackets (on the device side) to 8 to 10 mm.
Too short a sheath length might result in poor contact or a disconnected cable. On the
contrary, too long a sheath length might expose the core wire and cause an electric shock.