The 1203-FM1 module is a Flex I/O SCANport module from Allen-Bradley/Rockwell Automation. It is designed to be mounted on a special Allen-Bradley 1203 series terminal base unit, and only on this particular terminal base unit. It cannot and should not be used with any other type of flex base. The 1203-FM1 SCANport module can be removed or inserted under power safely, but note that removing it under power may cause the SCANport devices that are attached to it to experience faults. To install the 1203-FM1 SCANport module with or without applied power, rotate the keyswitch on the 1203 terminal base unit clockwise to position 1, make sure that the flexbus connector is pushed all the way to the left to connect to the neighboring terminal base, make sure the pins on the bottom of the module are all straight, position the module by using its alignment bare, and press the module firmly down into place until the latching mechanism of the terminal base is locked into the module.

The Allen-Bradley/Rockwell Automation 1203-FM1 Flex I/O SCANport module sometimes requires twice as much adapter power supply current as standard flex modules do, and this limits the number of standard modules and the number of modules like the 1203-FM1 SCANport module that can be installed in the same system. Up to 4 1203-FM1 Flex I/O SCANport modules can be used with the same flex adapter at a time. This module's input voltage rating is 5 Volts from the Flexbus adapter. Its dimensions are 1.8 x 3.7 x 2.1 inches, its operating temperature range is 32 to 140 degrees Fahrenheit at 5 to 80% non-condensing relative humidity, and its storage temperature range is -40 to 185 degrees Fahrenheit at 5 to 95% non-condensing relative humidity.