ewo1
SR. MEMBER - 99 Amtran RE DT466E HT 250HP-Md3060
J1587
In J1587/J1708 networks, terminating resistors are generally not required, unlike J1939 networks. J1587 utilizes a two-wire bus for communication, and proper wiring and testing are more crucial than terminating resistors.
In J1587/J1708 networks, terminating resistors are generally not required, unlike J1939 networks. J1587 utilizes a two-wire bus for communication, and proper wiring and testing are more crucial than terminating resistors.
- No Terminating Resistors:
Unlike J1939, which requires 120-ohm terminating resistors at the ends of the bus, J1587/J1708 does not typically need these. - Bus Termination:
Proper bus termination in J1587/J1708 is achieved through correct wiring, ensuring proper voltage levels and continuity checks. - Testing:
To verify proper bus termination, you should measure the voltage between the J1587+ and J1587- terminals relative to ground. The voltage should be within specific ranges (e.g., 6-11 VDC for J1587+ and 9-13.5 VDC for J1587-)
- Resistance Checks:
With the key off, you can also measure the resistance between the J1587+ and J1587- terminals, which should be between 3k and 18k Ohms, and between each terminal and ground, which should be more than 1k Ohms
Troubleshooting J1708/J1587 Connections