2900067 Contact Interface Relay Module, UM-D37SUB/M/HC3/AIO/MT. 16-channel module for Honeywell C300 modules. The module is controlled by the control system via 37-pos. D-SUB or 50-pos. FLK. A screw connection (1+, 1-,…16+,16-) with knife disconnection is provided in the field. Module width: 170 mm.