Analog voltage input module provides 16 single-ended or 8 differential input channels. Each channel can be configured using the configuration software for either of two input ranges 0 to 10 V (unipolar) default, -10 to +10 V (bipolar). This module can be installed in any I/O slot that has a serial connector in an RX3i or Series 90-30 system. The MODULE OK LED provides module status information on powerup. ON: status is OK, module configured, OFF: no backplane power or software not running (watchdog timer timed out).