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3. Installation of the central control unit CMXR-C2
42
Festo GDCP-CMXR-C2-HW-EN 1002NH
CAN [X6] connection
Pin
Signal
Meaning
5
1
9
6
1
2
3
4
5
6
7
8
9
Housing
n.c.
CAN-L
SGND
TERM1
TERM1
GND
CAN-H
TERM2
TERM2
(screening)
Not connected
CAN bus low
Signal ground
TERM1 *)
TERM1 *)
Optional GND
CAN bus high
TERM2 *)
TERM2 *)
*) Connection for activating the internal terminating resistor (refer to CAN bus terminal)
Table 3.9 Pin allocation for CAN connection [X6]
CAN bus terminal
Install a bus terminal at both ends of the fieldbus (first and last station).
A terminating resistor for the bus terminal is built into the device. If you install the device
onto the end of the fieldbus, you can activate the integrated terminating resistor by con-
necting pins 4 and 5 (TERM1) and pins 8 and 9 (TERM2) (see the following figure).
1
CAN connection
2
Jumper 1 (CAN+)
3
Jumper 2 (CAN-)
4
Integrated
terminating resistor
Fig. 3.7 CAN interface with activated bus terminal
The two jumpers “Term1” and “Term2” are used to connect the terminating resistor (R) to
the CAN data transmission lines.
The CAN connection must be made using a suitable cable.
We recommend a data cable as set out in ISO/DIS 11898
(CAN standard).
1
2
4
3
Summary of Contents for CMXR-C2
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