PAGE 34 06 Apr 2000 CH. 6: COMMUNICATIONS
GFK-1819
6.6 Current Loop
The following diagram shows the connection to a device with an active 20mA current loop. The current
loop on the TIU100/110 is passive. Either the PLC must provide the 20mA source or an external current
source must be supplied.
Note: Current Loop is not a standard option on the TIU100/110. Current loop must be ordered
specifically or can be re-fit into a standard unit. Contact a Horner Electric dealer for more inform ati on.
Note: Current Loop is not an option with the TIU050/101/102/103/111/112/113/20X.
Figure 6.4 – Current Loop

+

SR
ST

-

T+
T-
R+
R-
20mA Loop
20mA Loop
10
11
12
9