EMERSON IC670ALG230 24VDC 18-Channel Current Source Analog Input Module

The Current source analog input module accommodates 8 inputs on a common power supply. An LED, visible through the transparent portion of the module top, is on when both backplane and field power are present, and the fuse is not blown. Module converts current levels to unscaled analog input data. Analog scaling is performed by the Bus Interface Unit, which provides the scaled data to the host. Software Range selections of 0 to 20 mA and 4 to 20 mA are configurable on a per-channel basis. The 250 ohm resistor converts input current to a voltage with respect to common. The input R–C filters high-frequency noise, while the op amp buffers the signal to the analog/digital converter. All eight +24 VDC Out terminals are common to each other. The chassis ground goes to the I/O Terminal Block ground terminal.