The B872-200 4-channel analog (D/A) output module converts numerical data ranging from 0000 to 4095 into output voltage ranges (12-bit resolution).

The analog output module allows you to drive a wide array of field devices requiring different voltages based upon your unique application. You can select from four available output voltage ranges. The ranges, which are 0 to 5 V, 0 to 10 V, -5 to 5 V, and -10 to 10 V, are selected by means of four pairs of jumpers, one pair per channel. You can operate multiple ranges simultaneously.

The module is designed to allow you to control the state of each output channel when the programmable controller is reset or stopped. The output of the channel can either remain at the last value (HOLD) or go to 0.0 mV i.e., return-to-zero (RTZ). You can select this option for each of the four isolated outputs using a four-position DIP switch. A switch is associated with each output (switch 1 for output 1, etc.). The HOLD or RTZ function is selected by you to meet your specific application. The RTZ function allows you to bring the outputs to zero as a safety feature. The HOLD function allows you to maintain the last valid output value after the loss of Ourbus communication.

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 255 C provides precise control of your application. Refer to the figure below for the simplified schematic of the module.