S7-1200 expansion module with 4 current or voltage analog inputs. Catalog number: 6ES7231-4HD30-0XB0. Specification:Input current:Current consumption, typ: 45 mAFrom backplane bus 5VDC: 80 mAPower loss: 1.5WAnalog inputs: 4Type of inputs - set:Voltage: ±10V, ±5V, ±2.5VCurrent: 0 ... 20 mAInput resolution: up to 12 bits +1 character bit..