The 20ALMDC-AXXX-8 is an Input Loop Powered Trip Amplifier, deriving its power from the input signal. The output of 20ALMDC-AXXX-8 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.
- 24VAC/DC Rated contacts
- 4 to 20mA Input current
- Output resistance 5R (on) 24V type - 24R on 110Vac type
- 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
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