The B872-100 4-channel analog output module converts numerical data ranging from 0000 to 4095 into current ranging from 4 to 20 mA with 12-bit resolution.
The module is designed to control the state of each output channel when the PLC is reset or stopped. The output of the channel can either remain at the last value (hold) or return to zero (RTZ).
You can select the hold or RTZ option for each of the 4 isolated outputs using a 4-position DIP switch. A switch is associated with each output (switch 1 for output 1, etc.).
NOTE: Module Output Alert
RTZ disables the output of the module so that output current goes to 0.0 mA, not to zero scale (4 mA). Monitor voltage goes below 1V to indicate an output current loss of less than 4 mA.
The module has four isolated analog outputs, and is capable of updates to all four channels every 1 ms. The 12-bit resolution and the absolute accuracy of +/-0.1% at 25 °C provides precise control of your application.
The following figure shows the simplified schematic of the B872-100 module.
