Fieldbus Coupler 750-337, 750-338
•
49
Fieldbus
Coupler
WAGO-I/O-SYSTEM 750
CANopen
3.1.2.4 Fieldbus Connection
750-347
The CAN interface of the Fieldbus coupler 750-337 is designed
as an Open Style connection,
MCS (Multi Connection System; Series 231; included).
750-348
The Fieldbus coupler 750-338 posseses a 9-pole D-SUB-plug
connector for the field bus connection.
(Item no: 750-963, not included).
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 M
Ω
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)
Pin
Signal
Description
5
CAN_V+
Not used
4
CAN_H
CAN Signal
High
3
Drain Shield
Shield
connection
2
CAN_L
CAN Signal
Low
CAN_High
drain
CAN_Low
CAN_GND
1
GND
Ground
Fig. 3.1.2-3: Pin assignment for fieldbus connection of the 750-337, Series 231 (MCS)
g012400x
3.1.2.4.2 D-SUB (750-338)
Description
Signal Pin
Pin
Signal
Description
Not used
-
1
CAN Signal
Low
CAN_L
2
6
- Not
used
Ground
GND
3 7
CAN_H CAN Signal
High
Not used
-
4 8
-
Not used
Shield
connection
Drain
Shield
5
1
3
4
5
6
7
8
9
2
9
CAN_V+ Not used
Fig. 3.1.2-4: Pin assignment for fieldbus connection of the 750-338, D-SUB
g012231d
