User manual

2638A
Users Manual
3-2
3-Wire or
4-Wire Connection
3-Wire or 4-Wire Connection
2-Wire
Connection
2-Wire Connection
Note: For 3-Wire connections, leave the H sense open.
hcn024.eps
Figure 3-1. 2-Wire, 3-Wire, and 4-Wire Example Connections
Wiring Safety and Considerations
WXWarning
To prevent possible electrical shock, fire, or personal injury:
• Consider all accessible channels to be hazardous live and an
electric shock hazard if any channel is connected to a
hazardous voltage source.
• Do not remove, touch, or change the internal wiring of
hazardous inputs until the input source is turned off.
• Remove inputs from hazardous voltage sources before an
input module is opened.
• Use the correct terminals, function, and range for
measurements.
• Make sure proper insulation is maintained between channel
wiring terminations and that no loose strands are outside of
the terminal block connections.
WCaution
To prevent damage to the Product, do not exceed the specified
input voltage levels.