Power Save Timer Model # 091-191-115 The Model 091-191-115, Power Save Timer, reduces the power consumed by your block heater by limiting the duty cycle to 1 hour "ON" and 1 hour "OFF". See data sheet Over Voltage Relay Model # 091-108 The Over Voltage Relay is a battery voltage monitor which detects an over voltage condition. UV-OV Relay Model # 091-45 The UV-OV Relay is a precise programmable voltage detector that monitors the battery system voltage and detects both over voltage and under voltage conditions. Alternate Action Relay Model # 091-98-12 The Model 091-98-12 is designed to turn a load ON and OFF by grounding an input to the relay. Time Delay Relay -DOPI Model # 091-100-012-X The Model 091-100-012-X is designed to delay the operation of a device for a definite time interval after energizing some other equipment. Time Delay Relay -DODO Model # 091-103-012-X The Model 091-103-012-X is designed to keep a load energized for some time interval after the load is de-energized. Auto Trol Model # 091-36 The Model 091-36 is a low frequency cutout relay intended to protect A.C. loads and prevent current draw and motor burnout. Auto Interlock II Model # 091-134 The Model 091-134, Auto Interlock II, is a power transfer relay which automatically transfers 120 volt AC from the shoreline to the auxiliary generator when the generator is started. Auto Interlock III Model # 091-134A The Model 091-134, Auto Interlock II, is a power transfer relay which automatically transfers 120 volt AC from the shoreline to the auxiliary generator when the generator is started. Alarm Controller Model # 091-158 The Alarm Controller is a logic module that implements the logic "OR" or "AND" functions in a variety of control applications. Relay Board 4 Model # 091-32-024X-XX The Relay Board 4, is a four relay assembly designed to simplify installation and wiring of individual relays. Relay Board 2 Model # 091-32-029X-XX The Relay Board 2, is a two relay assembly designed to simplify installation and wiring of individual relays.