Transmitter supply unit, Screw terminal, Number of channels: 2, Input: 0/4 ... 20 mA with HART, Output A: Passive, Output B: Passive, SIL 2, Zone 2 r-stahl.com/en/us/products/automation-interfaces-and-solutions/isolators/ex-i-isolators/series-9160-transmitter-supply-unit-43447/214903-43498/