User GuidePage 4 PP3072.2 SN-W/E Interface UnitSpecificationsMounting: DIN RailPower Requirements: 24V d.c. nominalAmbient Operating range: 0 to 70∞C/32 to 158∞FSealing: To IP20/NEMA1EMC: EN 61326:1999Wiring Details (Customer and Thermometer connections)Pin No. Function1 Power In (+)2 Power In (-)3 mA Out (+)4 mA Out (-)5 Emissivity In (+)6 Emissivity In (-)7 Laser Switch Input8 Common (laser and command)9 Command Switch Input10 Relay 1a11 Relay 1b12 Relay 2a13 Relay 2b14 Comms from IRT (+) [Y]15 Comms from IRT (-) [Z]16 Comms to IRT (-) [B]17 Comms to IRT (+) [A]