Members of CiA and Euromap have collaborated to develop CANopen profiles for extruder downstream devices, such as pullers, corrugators, saws, calibration tables, and co-extruders. These devices operate with NMT (network management) server functionality only, while the extruder manager provides both NMT manager and server roles, handling all heartbeat and EMCY (emergency) messages from the downstream devices.

The CiA 420 profile set enables seamless integration of downstream devices from different manufacturers. Euromap adds further specifications for local non-CANopen interfaces, covering emergency-stop wiring, a discrete measuring wheel interface, and non-CAN interfaces for saws.

The CiA 420 series defines CAN bit rates, connectors, cabling, and node-IDs. According to CiA 420, downstream devices receive control commands via RPDO (receive process data object) and send status responses via TPDO (transmit process data object). The PDOs also contain process setpoints and actual values, meaning extruder manager commands are confirmed at the application level. It also specifies PDO communication and mapping parameters for various downstream devices. All PDOs support synchronous transmission and reception, with a SYNC cycle time of 20 ms. Configuration parameters are written and read using the default SDO (service data object) channel.