Normal ver-
sion
(without
WP)
The reader x (x=1...3) must be connected to the
SREL3 controller via a four-wire cable. Alternatively, the reader can be
connected directly via a supply voltage. In such a case, you only need to
use a three-wire cable (A, B, -) to the controller.
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.
SmartRelais 3 Leser
4. Connections
29 / 132
EN
