Power amplifier 20ALMDC-AXXX-8

switchingcompactadjustable

Loop Powered Trip Amplifier Loop Powered Input 4-20mA N/O or N/C SSR Output Front Panel Setpoint Setting The 20ALM is an input loop powered trip amplifier, deriving its power from the input signal • High or low alarm option • Low voltage drop • Setpoints available on front panel as 0.4 to 2V signal • (4 to 20mA) • LED indication of alarm • Unique low cost solution The output of the 20ALM is a single pole, normally open, solid state relay which can be configured to close either above or below the adjustable setpoint. The switched output can be connected to any potential within 1kV of the transmitter supply, while transients of 2.5kV can be withstood. The relay is designed to switch AC or DC. The trip amplifier is typically used to activate a warning or control system override when a sensor output goes above or below a pre-set limit. Alternatively, the unit can be used for simple on/off control, having a built in switching hysteresis. The device is housed in an ultra-compact DIN-Rail mounted enclosure, only 18mm wide. Recommended operating conditions • Input current 4-20mA • Relay contact voltage 24Vac/dc or 110Vac • Relay current (max) 300mA @ 24Vdc – 130mA @ 110Vac • Output resistance 5Ω (on) 24V type – 24Ω on 110Vac type Environmental conditions • Storage temperature -40-70˚C • Operating ambient 0-55˚C • Relative humidity 0-90% RH