The Sartrex Logic Relay Modules are a direct replacement for the C.P. Clare HG3A-1008 relay modules. The modules and their chassis are mounted in cabinets in equipment rooms. Each module incorporates an 11 pin octal plug to interface to the mounting chassis.
Sartrex selected two C.P. Clare HGRZMT-5111-R05 relays as the replacement units to install in the modules. The coils of the relays are connected in parallel. Three of the available 4 Form D contacts are wired out to the connector pins at the bottom of the module to make it compatible to the original relay module.