VIPA SSM-BG41 - Fig. 3-5: a Passive 20 Ma Current Loop Interface

Functional description and allocation of terminal pins Manual BG41/BG42/BG43
3-8 Rev. 99/49
3.2.1.5 A passive 20mA current loop interface
Peripheral equipment (e.g. the printer PT 88), as the active part, are in the position to take over the
supply of the 20mA-connection. In this manner, the serial interface can be operated as the passive
part. A 24V-supply will therefore not be needed for the operation of the module.
Fig. 3-5:A passive 20mA current loop interface