The BTRA173 is a triple alarm relay, suitable for all standard process signals and features three independently adjustable trip-points with relay contact outputs. The unit accepts voltage from 1Vdc up to 2kV or current input signals from 1mA up to 5A. The trip circuits are operated directly from the pre-conditioned input circuit with trip status indicated by red LED’s. Dead band is fixed at 2% typically, however this can be factory changed to 5 or 10% by changing an internal resistor. Various power supply choices are available ranging from 240Vac down to 8Vdc, provide power isolation. Surge protection for power supply and input is provided.