Allen-Bradley MicroLogix 1200 User Manual page 59

• To ensure optimum accuracy for voltage type inputs, 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 module does not provide loop power for analog inputs. Use
a power supply that matches the input transmitter specifications.
1762-IF2OF2 Input Type Selection
Select the input type, current or voltage, using the switches located on
the module's circuit board and the input type/range selection bits in
the Configuration Data File. Refer to MicroLogix 1200 and 1500
Programmable Controllers Instruction Set Reference Manual,
publication number 1762-RM001. You can access the switches through
the ventilation slots on the top of the module. Switch 1 controls
channel 0; switch 2 controls channel 1. The factory default setting for
both switch 1 and switch 2 is Current. Switch positions are shown
below.
Switch Location
1762-IF2OF2 Output Type Selection
The output type selection, current or voltage, is made by wiring to the
appropriate terminals, Iout or Vout, and by the type/range selection
bits in the Configuration Data File. Refer to MicroLogix 1200 and 1500
Programmable Controllers Instruction Set Reference Manual,
publication number 1762-RM001.
Analog outputs may fluctuate for less than a second
ATTENTION
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.
Wiring Your Controller
Ch0 Ch1
Voltage (OFF)
Current (ON) Default
1 2
Publication 1762-UM001D-EN-P - March 2004
3-23