The order that works is protocol, then pin map, then code, then contact count, then housing. A-coded bodies cover sensor, power, and CAN-style branches; D-coded bodies cover four-wire industrial Ethernet links; the contact count has to match the conductors your trunk already carries. Ximeconn Waterproof Connectors offers this CAN BUS 3-way M12 distributor in A-coding and D-coding, with 2, 3, 4, 5, 8, and 12 pos customization, one input and three outputs, thread locking, IP67 protection, and conformity to IEC 61076-2-101 and IEC 61076-2-104. Send your protocol, port list, and pin requirements to request the drawing and sample support before the order goes in.

FAQ

Q: How do A-coded and D-coded M12 distributors differ in PLC fieldbus wiring?

A: A-coding uses a contact block for sensor leads, 24 V auxiliary power, and CAN-based segments such as DeviceNet, where five contacts can carry V+, V−, CAN_H, CAN_L, and drain. D-coding uses four contacts with a different keyway for 100 Mbit industrial Ethernet links such as PROFINET or EtherCAT. The keyway offset means an A-coded plug cannot seat in a D-coded port, which keeps power and Ethernet circuits apart on the same machine.

Q: Which M12 pin count should I check for a 5-pin DeviceNet or CAN BUS branch?

A: Check for a five-contact A-coded body when the trunk is a 5-pin DeviceNet or CAN BUS cable, so V+, V−, CAN_H, CAN_L, and the drain all pass through to each output. Confirm on the drawing that every output mirrors those five signals and that the shield path continues. Four contacts would drop the drain; eight contacts help only if the extra positions have a function you need.

Q: What pin mapping and termination questions should I resolve before ordering an M12 fieldbus distributor?

A: Ask which port is the input and which are outputs, whether each output mirrors the input pin for pin, and how the shield and drain reach the shell. Ask whether a 120 Ω terminator is fitted inside the body and on which positions, since a CAN segment needs termination at each physical end. Also confirm the mating port types on the PLC side and get the approved drawing in writing with the order.

Sources / References

IEC 61076-4-001:1996

DeviceNet Communication Network - ODVA Technologies

NXP Application Note: Controller Area Network Physical Layer Requirements

Related Examples

Ximeconn CAN BUS 3-way M12 distributor specifications