Description
The BPA201 is a signal conditioning and alarm, the base functions of the BPA201 are:
1. Adjustable trip-point with voltage-free 8A contact output.
2. Optional retransmit analogue output up to 50mA representing input signal range.
Power supply can be 12 or 24Vdc or low level (non-isolated) AC voltage. Double surge protection is standard as with all Series 200 modules to prevent failure due to spikes induced by DC switched inductive loads. The BPA201 is designed to accept DC voltage and DC current inputs accommodating a wide range of process signals. The voltage input version covers a range of 0.1 up to 100Vdc and references to the DC supply common and the output common. The current input version covers a range of 1mA up to 1000mA and uses a DC-shunt resistor on the input circuit to generate a voltage signal of typically 1V. (e.g. 47Ω for 20mA). This voltage is then transferred to a high impedance differential input stage. In this way the BPA201 can be connected in series mode as is usually required in current loops without causing unwanted ground connections. The trip-point and switching hysteresis are adjustable from the front of the module. A 2mm test socket is used for trip adjustment within a 0 – 5V trip set range calibrated to correspond to the input signal range. (1 – 5V for 4 – 20mA input). Trip status is indicated by a red L.E.D. on the front. Direct or reverse action is selectable internally by coding plugs.
