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Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
S
TANDARD
C
OMMUNICATIONS
I
NTERFACES
CAN-
BUS COMMUNICATIONS
This CAN-bus interface is fitted as standard. It operates independently of the other communications
interfaces and may be accessed at the same time as them.
The CAN-bus interface uses a proprietary Proton Products protocol. It is exclusively used to
communicate between the unit and other Proton Products modules. The unit automatically detects
connection to other modules and configures the bus appropriately; it is not normally necessary to
manually configure this interface.
The CAN-bus interface is not intended for use with an external CAN-bus network.
CAN-bus interface
The CAN-bus interface may be accessed through the following pins:
Connector type: DB25 female (socket)
Functional
group
Pin Designation
Description
Notes
Shield
S
Shield
Shield
Ensure that the cable shield is
connected to the plug shield
connection.
Power
supply
25
+24V SUPPLY +24V power supply
2
DGND
Power supply and
signal ground (0V)
15
24
CANbus
8
CAN H
CANbus high
9
CAN L
CANbus low
CAN-bus LED indicator
CAN
LED status
Indication
Flashing green
Online
CAN-bus communications
Flashing red
Communication error
Extinguished
No communication
1
1
4
2
1
5
3
1
6
4
1
7
5
1
8
6
1
9
7
2
0
8
2
1
9
2
2
1
0
2
3
1
1
2
4
1
2
2
5
1
3