Rockwell Automation 1762-IF2OF2 MicroLogix Analog Input/Output Module - Manual (Page 13)

MicroLogix 1762-IF2OF2 Analog Input/Output Module 13
Publication 1762-IN005C-EN-P - July 2013
Wiring
System Wiring Guidelines
Consider the following when wiring your system:
• The analog common (COM) is not connected to earth ground inside the module. All
terminals are electrically isolated from the system.
• Channels are not isolated from each other.
• Use Belden 8761, or equivalent, shielded wire.
• Under normal conditions, the drain wire (shield) should be connected to the metal
mounting panel (earth ground). Keep shield connection to earth ground as short as
possible.
• To ensure optimum accuracy for voltage type inputs and outputs, limit overall cable
impedance by keeping all analog cables as short as possible. Locate the I/O system as
close to your voltage type sensors or actuators as possible.
• The 1762-IF2OF2 module does not provide loop power for analog inputs. Use a power
supply that matches the input transmitter specifications.
Terminal Block Layout
ATTENTION
Analog outputs may fluctuate for less than a second when power is applied or
removed. This characteristic is common to most analog outputs. While the
majority of loads will not recognize this short signal, it is recommended that
preventive measures be taken to ensure that connected equipment is not
affected.
V out 1
V out 0
IN 1 +
IN 0 +
I out 1
I out 0
IN 1 -
IN 0 -
COM
COM Commons connected
internally