B875-200 Configurable A/D Input, Module Configuration

Setting the DIP Switch

Use the following procedure to set the eight-position DIP switch.

Step	Action
1	Locate eight-position DIP switch on rear of module. Note: These DIP switches are used to select the desired number of channels, from 1—8.
2	Set DIP switches based upon intended application prior to installation. Refer to module configuration DIP switch settings diagram, below, and to label located on left side of analog input module. Note: The analog input module is shipped with channel 1 ON, B873), DIP switch (SW1) set to ON. The module is I/O mapped as a B873 when only channels 1—4 are in use. The module is I/O mapped as a B875 when more than 4 channels are in use.
3	Ensure all unused DIP switches are kept to the right.

Configuring Settings

Module configuration DIP switch settings, diagram

NOTE: The B873 mode provides a faster throughput. Ensure that the placement of the input packs correspond with the DIP switch settings.

Sample Averaging Selection

Use the following table to determine the sample averaging selection.

Step	Action
1	Locate access hole on left side of module. Note: This hole allows access to three leads and a two-position jumper, that selects the number of samples to be averaged per input channel: 0, 2, 4 samples to be averaged.
2	Select either 0, 2 or 4 samples to be averaged.
3	Set desired averaging prior to installation. Refer to jumper settings diagram, below, and label located on left side of module. Note: The module is shipped with the jumper set for four samples. Module configuration DIP switch settings, diagram Note: Sample averaging helps reduce the impact of serious noise on the input.