Connecting The Sck-C-Modbus Communication Module; Connection Diagram For Sck-C-Modbus - Phoenix Contact SCK-C-MODBUS User Manual

Solarcheck family
52
PHOENIX CONTACT
6.5.2

Connecting the SCK-C-MODBUS communication module

Snap the device onto a 35 mm DIN rail according to DIN EN 50022 in the control cabinet.
Install the power supply, RS-485 communication, and the Solarcheck measuring devices as
per the connection description in Section 6.1 on page 39 and the following connection dia-
gram:
+
RS-485
–
OUT DC 24V +
POWER
–
Figure 6-4

Connection diagram for SCK-C-MODBUS

1. First, connect all of the desired measuring modules to the corresponding T inputs of the
device.
To do this, wire the data inputs (T1 ... T8) to the respective data outputs of the measur-
ing modules (SCK BUS). Two cables are required for each data link to the measuring
modules. The cables may be swapped.
2. Next, connect the RS-485 connections.
To do this, wire data output A to the positive input of the RS-485 master and data output
B to the negative input of the RS-485 master. The internal shield of this cable can be
connected to the terminal block (GND2) so that the potential of the RS-485 network line
is also routed. Instead of the internal shield, a third wire can also be used, for example,
to route the potential in the RS-485 network. Also make sure that the external shield of
the data cable is always connected to ground at both ends so as to prevent inductive
couplings in the system from the power cables.
SCK-C-MODBUS
COM
GND2
A
B
POWER
+24V
GND1
T
1
T
2
T
3
T
4
T
5
T
6
T
7
T
8
SCK-M-I-...
P_OUT
GND1
U
OUT
0...10V
GND2
U
IN
D_IN
SCK BUS
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