VIPA SSM-BG41 - Fig. 3-4: an Active 20 Ma Current Loop Interface

Manual BG41/BG42/BG43 Interface modules
Rev. 99/49 3-7
3.2.1.4 An active 20mA current loop interface
The serial interface functions as the active part of the transmission link, the peripheral device as the
passive part.
Fig. 3-4:An active 20mA current loop interface
Observe shielding! See construction guidelines in chapter 5!
The jumpers J6 on the mother board and X3 and X5 on the module enable the current sources for the
20mA current loop to be supplied with 24 V from the back plane bus.