The REP-ASI BW1855 is an IP 20, DIN-rail mountable repeater for use an enclosure mounted AS-I extension solution. Network segments attached by a repeater are considered separate physical networks (trunk and drop lengths for each segment are determined as if the other segments are not present), but one logical network (addresses cannot be duplicated; the scanner and configuration tools work as a single network).
The repeater does not consume an address and is invisible to all the other devices on the network. The repeater supports a network extension of one full segment (an additional 100 m of AS-I cable). The REP-ASI BW1855 can be used in conjunction with an AS-I Tuner (ASI-TUNER BW1648 or ASI-TUNER-DIAG BW1843) to extend the network with segment lengths greater than 100 m. Repeaters can also be used to isolate power supplies on networks with multiple supplies, allowing greater than 8 A on the entire AS-I system (no individual segment may carry more than 8 A).
Up to two repeaters are allowed between any slave and the master. Placing the master in the middle of the system allows a maximum linear system of 500 m (if standard repeaters are used) or potentially 1000 m (if terminators and advanced repeaters are used), as shown in the diagram below.
A = Power supply
B = Master
C = Repeaters