The Field Interface Module (FIM) for Analog Input (AI) signals is useful for interfacing Analog Signals of various types originating from sensors and field devices with PLC Analog input modules.

The FIM consists of multiple (4 nos. or 8 nos.) AI type Analog Signal conditioning & Isolation modules mounted on a board. Different module types are available to interface input signals such as 0-+/-10V, 0-20mA, 4-20mA, RTD, Thermocouple, etc.

These modules perform the function of Signal conditioning and Isolation at the input side to generate a calibrated and linearly proportional 4-20mA 2 wire or 4 wire output signal. This 4-20 mA signal is connected as input to the PLC Analog Input (AI) channel.

The use of CAN-AI FIM provides the advantage of Channel to Channel Isolation between analog input signals without loss of key performance parameters such as accuracy and response time. Further the unique modular design of CAN-AI FIM allows the user to choose any combination of Input modules to suit the requirements of his project. Thus it is possible to interface multiple Field Signal types with a 4 Channel or 8 Channel 4-20mA AI module of PLC.

e.g. It is possible to interface 1 nos. RTD, 1 nos. Thermocouple, 1 nos. 0-10V, & 1 nos. 4-20mA field signals to a single 4 Channel 4-20mA Input module of a PLC system.

The connection with Field Signals is provided with Phoenix type screw connectors. PLC side connections are also provided with Phoenix type screw connectors. Customized designs using D-sub connector on PLC side can be available to allow ease of connections using Prefab cables.

The FIM is housed in a profile suitable for mounting on 35 mm std. DIN rail.

Technical Specifications

A. AI Type Analog Signal Conditioning Modules

Input Options available (From Field Devices): a. 2 – Wire 4-20mA
b. 4 – Wire 4-20mA
c. 4 – Wire 0-20mA
d. 0- +10VDC
e. 0- +/-10VDC
f. RTD PT-100
g. Thermocouple Type K
Output 4-20mA 2 wire/ 4 wire (To PLC AI Module input)
Isolation 2KV between Input & Output
2KV between Input & Supply
Connections Pluggable on the base board.

B. Base Board

No. of Channels 4 nos. or 8 nos.
Field Side Input Connections Phoenix screw connectors suitable for 1.5mm Sq. wires.
PLC Side Connections Phoenix screw connectors suitable for 1.5mm Sq. wires.
Power Supply 24VDC +/-10%
Isolation Level 2KV between Field side inputs and Supply
Nil between PLC side outputs and Supply
Note : No isolation between PLC side channel outputs.
Size 4 Channel: W 100mm X H 110mm X D 80 mm
8 Channel: W 180mm X H 110mm X D 80 mm
Mounting DIN Std. 35 mm rail mounted.