Reference:
4939SN-WH
V-Plex Addressable Surface Mount Contact. Programmable surface mount contact. Compatible with control panels with serial number device capabilities for multiplex polling loop. Standard gap: 1-1/4" (32mm). 5" (1.5m) CLII jacketed cable. Epoxy sealed for protection from moisture and impact. Programmed from VISTA keypad or learn mode. Switch Type: Form A (SPST) Reed. Contact Rating: 100ma @ 28VDC. Honeywell Exclusive: Patent polling loop technology.