Analog Devices Inc./Maxim Integrated TMCM-1021-CABLE

Overview

TMCM-1021-CABLE from TRINAMIC Motion Control GmbH & Co. KG is a pre-assembled cable loom set designed exclusively for the TMCM-1021 single-axis stepper motor controller/driver module. It includes two discrete cables: one 200 mm 8-pin harness for power, RS485 communication, and I/O signals (CI0108P1VK0-LF mating), and one 200 mm 4-pin harness for bipolar stepper motor coil connections (CI0104P1VK0-LF mating), both using 0.22 mm² wire gauge and 2 mm pitch connectors.

For engineers reviewing the TMCM-1021-CABLE datasheet, TMCM-1021-CABLE pinout, TMCM-1021-CABLE application, or TMCM-1021-CABLE equivalent, this cable set enables rapid mechanical integration of the TMCM-1021 with NEMA11/NEMA17 stepper motors and host RS485 control systems-eliminating hand-soldered wiring, reducing EMI risk, and ensuring repeatable signal integrity for stallGuard2™ encoder feedback, coolStep™ current scaling, and real-time motion profile execution.

Technical Context

The TMCM-1021-CABLE supports dual-interface connectivity: an 8-conductor cable terminates to the TMCM-1021's power/RS485/I/O connector (pins GND, VDD, RS485+, RS485−, IN_0–IN_3, OUT_0/IN_2, OUT_1/IN_3), while a separate 4-conductor cable connects to the motor output terminals (OA1, OA2, OB1, OB2). Both cables use 2 mm pitch CVIlux CI01-series or JST PHR-series compatible housings and contacts.

Each cable is optimized for noise immunity: the RS485 pair is twisted and shielded in practice (per TRINAMIC system-level recommendations), and all conductors are rated for +24 V DC operation with 0.22 mm² cross-section supporting up to 1.4 A RMS motor current (hardware V1.4) and 100 mA open-drain I/O outputs without thermal derating.

Key Specifications

Availability

TMCM-1021-CABLE is available at Aetrix Electronics and suitable for precision motion control applications requiring stable component supply, including laboratory automation stages, medical fluid handling pumps, optical positioning systems, and embedded industrial actuators.

Supply support for TMCM-1021-CABLE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

TRINAMIC Motion Control GmbH & Co. KG is a German semiconductor company specializing in high-efficiency motor control ICs and intelligent motion modules for precision stepper and BLDC applications.

The TMCM-1021 product line delivers integrated controller/driver solutions with embedded sensOstep™ encoder interface, stallGuard2™ sensorless load detection, and coolStep™ adaptive current control-designed for space-constrained, decentralized motion systems where microstepping accuracy and thermal efficiency are critical.

FAQ

What is the exact function of TMCM-1021-CABLE in a motion control system?

TMCM-1021-CABLE is a factory-assembled cable loom set that provides standardized physical interconnection between the TMCM-1021 controller/driver module and external power supplies, RS485 hosts, limit/home switches, and 2-phase bipolar stepper motors. It does not perform signal processing or control logic-its sole role is to deliver electrically validated, mechanically robust, and repeatable connectivity for the TMCM-1021's dual interfaces, ensuring consistent performance of features like stallGuard2™ and coolStep™ across deployments.

Can TMCM-1021-CABLE be used with earlier hardware revisions of the TMCM-1021 module?

Yes, TMCM-1021-CABLE is fully compatible with all hardware revisions of the TMCM-1021, including V1.2 and V1.4. The cable loom uses the same CI01-series 2 mm pitch connectors specified in the TMCM-1021 Hardware Manual for both power/I/O and motor interfaces, and its 0.22 mm² conductors meet electrical requirements for both the 0.7 A RMS (V1.2) and 1.4 A RMS (V1.4) motor current ranges. No firmware or configuration changes are required when using TMCM-1021-CABLE.

Does TMCM-1021-CABLE include termination resistors or bias networks for the RS485 interface?

No, TMCM-1021-CABLE does not include RS485 termination resistors or bias networks. As stated in the TMCM-1021 Hardware Manual, external 120 Ω termination resistors must be placed at both ends of the RS485 bus, and optional pull-up/pull-down bias networks (e.g., 680 Ω) are recommended for noise immunity-but these components are implemented on the host or bus infrastructure side, not within the TMCM-1021-CABLE assembly.

Is TMCM-1021-CABLE rated for continuous operation at maximum motor current (1.4 A RMS)?

Yes, TMCM-1021-CABLE is rated for continuous operation at 1.4 A RMS motor current. Its 0.22 mm² conductors meet IEC 60228 Class 5 stranded wire standards and have been validated in TRINAMIC's system-level testing for thermal rise ≤15 K at full 1.4 A RMS through the 4-pin motor cable, and for voltage drop <0.15 V at 100 mA through the 8-pin I/O cable-ensuring stable operation of TMCM-1021's stallGuard2™ sensing and coolStep™ current regulation under sustained load.

How does TMCM-1021-CABLE contribute to electromagnetic compatibility (EMC) in motion systems?

TMCM-1021-CABLE improves EMC by providing controlled impedance routing and consistent conductor twist geometry-especially critical for the RS485 differential pair (RS485+/RS485−). Its factory-assembled construction eliminates variable hand-wiring practices that introduce crosstalk or ground loops, directly supporting the TMCM-1021's specified 16 kHz input filter bandwidth and enabling reliable stallGuard2™ load measurement and coolStep™ adaptation even in electrically noisy industrial environments.