Reader
Controller
Reader
Controller
Alternative circuit
Reader connection
SREL3 controller connec-
tion
Signal
A
A1/A2/A3
RS-485: Data line A
B
B1/B2/B3
RS-485: Data line B
-
-
GND. Used to establish the
common ground reference
potential for the data lines.
Any ground connection to
the SREL3 controller.
+
+
V
IN
. Connection for power
supply (external or via con-
troller).
SmartRelais-3-Leser
4. Connections
34 / 152
EN
