Check the listing for details. SNELL & WILCOX IQBCO DIGITAL AUDIO CHANGEOVER SWITCH CARD WITH REAR MODULE. Condition: Used. Listed at 149.00 USD. Official PayPal Conversion Rates Add Currency Converter To Your Items Official PayPal Conversion Rates Add Currency Converter To Your Items SNELL & WILCOX IQBCO DIGITAL AUDIO CHANGEOVER SWITCH (WITH REAR CONNECTOR MODULE IQBCO-2A-D) The IQBCO is a passive changeover switch with AES audio presence detection. Both inputs are monitored for signal presence and channel status. The condition for switch over may be programmed to be signal loss or a change in channel status. Balanced (-D) and unbalanced (-B) versions are available. Both units include three GPI/O’s that provide additional trigger inputs or tally outputs. In event of power loss input A is automatically selected. For additional security the relay switch is mounted in the rear panel assembly thus enabling the module to be removed from the chassis without breaking the connectivity of input A to output. RollCall remote and card edge controls are available. All fault or warning conditions can be reported and logged over RollCall. Passive balanced AES audio changeover switch Automatic switch over on programmable condition(s) Three programmable GPI/O’s for control or tally Programmable switch over time delay Continuity (A input) maintained with power loss or module removal RollCall remote and card edge control RollCall fault logging Thanks for looking!