User manual

Chapter 4 Installation and Wiring
4-7
4.2 Wiring Precautions
This section describes the procedures and precautions for wiring power cords.
4.2.1 Connecting the Power Cord
 DC Connection
 Power Cord Specifications
WARNING
POWER, WIRING, AND GROUNDING HAZARDS
• Be sure the 24 VDC power is OFF when wiring to the power terminals of the unit.
• The unit uses only 24 VDC power. Using any other level of power can damage both the power
supply and the unit.
• Since the unit is not equipped with a power switch, be sure to connect a power switch to the
unit’s power supply.
• Be sure to ground the unit's FG terminal.
• When the FG terminal is connected, be sure the wire is grounded. Not grounding the OT unit
will result in excess noise and vibration. OT Series have the SG (signal ground) connection and
the FG (frame ground) connection inside. When connecting the SG wire to another device, be
sure that the design of the system/connection does not produce a shorting loop.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Power Cord Diameter 0.75 to 2.5mm
2
[0.0009 to 0.0097in
2
] (18-12AWG)
Conductor Type Simple or Twisted Wire
Conductor Length
• Use copper conductors only.
• If the Conductor’s end (individual) wires are not twisted correctly, the end wires
may either short against each other, or against an electrode.
7mm[0.28in]