SHAFT-STUB 2241221 - Caterpillar

The EMCP 4 has the following connections for communication:
Primary CANdata link (CAN 1)
Accessory CAN data link (CAN 2) (EMCP 4.4 only)
Modbus RTU (RS-485 Half duplex)-SCADA Data Link (EMCP 4.4 only)
RS-485 SCADA Data Link (Modbus RTU, Half Duplex) (EMCP 4.4 only)Primary CAN Data Link (CAN 1)
The data link module is equipped with a communications connection that utilizes CAN 1. The connection provides the following features:
Set point configuration
Allows core software and language text files to be "flashed"
Password protection for different levels of authorization
Same password strategy applies to the entire control
Provides communication with the engine control module (ECM) using the CAN protocol
Provides communication with automatic voltage regulators (AVR) using the CAN protocol when the AVR supports CAN protocol
Provides communication with on-package expansion thermocouple modules for use with engine temperatures
Provides communication with the Caterpillar Clean Emissions Module SystemThe Cat Digital Voltage Regulator (Cat DVR) is an example of an AVR that is supported by the CAN protocol.Primary CAN Communication Wires
The primary CAN communication wires are brought out of the EMCP 4 as part of the 120 pin connector. The pin designations for the EMCP 4 connector are shown in Table 1.
Table 1
Primary CAN Communication Wires
Pin # Name Description
43 CAN 1- Differential (-) for CAN
30 CAN 1 SH Shield for CAN
32 CAN 1+ Differential (+) for CAN The primary CAN