Fieldbus Connection - WAGO -I/O-SYSTEM 750 Technical Description

3.1.2.4 Fieldbus Connection

750-347
750-348
The connection point is lowered in such a way that after a connector is in-
serted, installation in an 80 mm high switchbox is possible.
The electrical isolation between the fieldbus system and the electronics is
made via the DC/DC converter and the optocoupler in the fieldbus.
The line screen must be connected for both field bus couplers on CAN Shield.
For both fieldbus coupler the shield on the CANopen communication cable
must be connected to drain. The shield is connected via a 1 MΩ resistor to
ground (earth) (rail carrier contact). A connection of low impedance between
shield and ground (earth) can only be made externally (for example by a sup-
ply terminal block). It is recommended to have a central ground (earth) con-
tact for the whole CANbus shield.
3.1.2.4.1 MCS (750-337)
Fig. 3.1.2-3: Pin assignment for fieldbus connection of the 750-337, Series 231 (MCS)
3.1.2.4.2 D-SUB (750-338)
Description
Not used
CAN Signal
Ground
Not used
Shield
connection
Fig. 3.1.2-4: Pin assignment for fieldbus connection of the 750-338, D-SUB
WAGO-I/O-SYSTEM 750
CANopen
The CAN interface of the Fieldbus coupler 750-337 is designed
as an Open Style connection,
MCS (Multi Connection System; Series 231; included).
The Fieldbus coupler 750-338 posseses a 9-pole D-SUB-plug
connector for the field bus connection.
(Item no: 750-963, not included).
CAN_High
drain
CAN_Low
CAN_GND
Signal Pin
-
CAN_L
Low
GND
-
Drain
Shield
Fieldbus Coupler 750-337, 750-338
Pin Signal
5 CAN_V+
4 CAN_H
3 Drain Shield
2 CAN_L
1 GND
1
1
2
6
2
7
3
3
8
4
9
5
4
5
Fieldbus Coupler
Description
Not used
CAN Signal
High
Shield
connection
CAN Signal
Low
Ground
Pin Signal Description
6 - Not used
7 CAN_H CAN Signal
-
8
Not used
9 CAN_V+ Not used
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g012400x
High
g012231d