The PLC 1746-NIO4V is an Analog Combination I/O module for enhancing SLC 500 control systems. It is a module within the SLC 500 controllers which offers a unique and easy to use interface, featuring two input channels and two output channels. The combination of the input and outputs in the same module allows for expansion in a space- and cost-efficient manner. The input channels are user-selectable by switches found on the analog control module. To configure the inputs to current, move the switch in the ON position. To configure for voltage inputs, move the switch to the OFF position. Channels are not individually isolated.
The 1746-NIO4V backplane current draw is 55mA for 5V and 115mA for 24V power. At normal operation, the 1746-NIO4V has an input range of -20 to +20 mA. The absolute maximum input current ranges from -30 to +30 mA. The absolute maximum input voltage ranges from - 7.5 to + 7.5V dc. The step response for the voltage output of the 1746-NIO4V is 2.5 ms at 95%.When installing the 1746-NIO4V make sure to position the module in the chassis nearest the bottom of the enclosure where the SLC 500 system is installed. If installed in a modular system, then position the module away from the chassis power supply. Take caution when wiring the 1746-NIO4V by using a shielded communication cable (Belden #8761) and only connecting one end to earth ground. Additionally, attempt to keep the cable as short as possible and use a power supply which matches the transmitter specifications.
