SLSI80 battery backupSeptember 27, 2016
Modified plastic substationSeptember 27, 2016
SLSI-80 Slave amplifier
SLSI master sub card, configured for 4 master stations and 8 callback substations. Looks the same as a subcard but has two wire links between relay 4 and relay 5. (RL4 + RL5). This card is included with controllers.