Specifications Other Informaton Scales All RX4 Manual addendum to RX4 manual for use of 2 RX4s with BDL168.   Application - 4 ZoneTransponding Receiver Add-on for BDL series occupancy detectors.

Use up to two RX4s with a BDL168 to add transponding to any 8 detection sections on your layout. Use one RX4 with a BDL162 or BDL16 to add transponding to any 4 detection sections on your layout.