Sanyo Denki PMA Series Stepping Motor Drivers — PMAPA1S6B01

Technical Dossier

Product Details And Specifications

Sanyo Denki PMA Series: Comprehensive Stepping Motor Driver Range and Technical Overview

The Sanyo Denki PMA Series stepping motor drivers are deployed across heavy industrial sectors including chemical processing plants, nuclear facility auxiliary systems, petroleum refining equipment, and precision semiconductor manufacturing lines. Manufactured in Japan under Sanyo Denki's SANMOTION motion control platform, the PMA Series occupies a well-established position in closed-loop and open-loop stepping drive applications where compact form factor, high torque density, and deterministic pulse-input control are required. The series is widely integrated into legacy DCS (Distributed Control System) architectures and standalone machine axes where servo-class feedback is not mandated but positional repeatability is critical.

The Evolution of PMA Series Architecture

The PMA Series was developed as part of Sanyo Denki's SANMOTION stepping product line, which traces its commercial deployment to the late 1990s. Early variants used analog current control with fixed microstepping resolution, typically 500 or 1000 pulses/rev. Subsequent revisions introduced selectable microstep division (up to 10,000 pulses/rev on later units), improved thermal management via aluminum heat-sink extrusion bodies, and expanded input voltage tolerance from single-phase 100VAC to 200VAC ranges.

The PMA Series model numbering encodes key electrical parameters: the digit following PA indicates phase count (1 = single-axis, 2 = dual-axis), the S prefix in the current rating segment denotes standard current class, and the trailing suffix (A01, B01, B02) identifies hardware revision and connector configuration. Compatibility between A-suffix and B-suffix units is not guaranteed at the connector level; wiring harnesses must be verified before substitution. Units with the B02 suffix introduced enhanced EMC filtering compliant with CE Directive requirements, making them the preferred replacement in European-export machinery.

As of 2026, the PMA Series is in the mature-to-end-of-life phase. Sanyo Denki has transitioned new design-ins to the SANMOTION F and SANMOTION R servo platforms. However, installed base volume in legacy equipment ensures continued demand for PMA Series spare parts through at least 2030. DriveKNMS maintains stock and sourcing channels specifically for this lifecycle phase.

PMA Series Full Catalog and Functionalities (SKU List)

The following SKUs represent the verified PMA Series product range. Each unit is a standalone stepping motor driver accepting pulse/direction or CW/CCW input signals.

PMAPA1S6B01: Single-axis driver, 6A rated output current, B01 hardware revision, 100–200VAC input, standard connector.
PMAPA2S6B01: Dual-axis driver, 6A per axis, B01 revision, shared power supply bus, compact dual-drive chassis.
PMAPA1S4B01: Single-axis driver, 4A rated output, B01 revision, suited for smaller frame stepping motors (NEMA 23 class).
PMAPA2S4B01: Dual-axis, 4A per axis, B01 revision, reduced heat dissipation requirement vs. 6A variant.
PMAPA1S6B02: Single-axis, 6A, B02 revision with enhanced EMC filtering; CE-compliant replacement for B01 in export machinery.
PMAPA2S6B02: Dual-axis, 6A per axis, B02 revision, CE-compliant, preferred for European OEM retrofits.
PMAPA1S4B02: Single-axis, 4A, B02 revision, CE-compliant, drop-in for PMAPA1S4B01 with harness verification.
PMAPA2S4B02: Dual-axis, 4A per axis, B02 revision, CE-compliant dual-axis configuration.
PMAPA1S6A01: Single-axis, 6A, A01 first-generation revision; analog current control, fixed microstep resolution.
PMAPA2S6A01: Dual-axis, 6A per axis, A01 revision; early production unit, limited microstep selection.
PMAPA1S4A01: Single-axis, 4A, A01 revision; original hardware platform, no EMC filtering stage.
PMAPA2S4A01: Dual-axis, 4A per axis, A01 revision; legacy dual-drive for early SANMOTION-integrated machines.
PMAPA1S2B01: Single-axis, 2A rated output, B01 revision; designed for small-frame motors in light-load positioning axes.
PMAPA2S2B01: Dual-axis, 2A per axis, B01 revision; compact footprint for multi-axis light-duty applications.
PMAPA1S2A01: Single-axis, 2A, A01 revision; earliest low-current variant, now fully obsolete.
PMAPA2S2A01: Dual-axis, 2A per axis, A01 revision; obsolete, sourced exclusively through aftermarket channels.

Sourcing Hard-to-Find and Obsolete PMA Series Parts

DriveKNMS operates a dedicated procurement channel for Sanyo Denki PMA Series units that have been discontinued or removed from the active Sanyo Denki catalog. For A01-suffix variants in particular, new-old-stock (NOS) inventory is the primary sourcing route, as factory production ceased prior to 2015. DriveKNMS maintains relationships with industrial surplus distributors and decommissioned equipment processors across Japan, Southeast Asia, and Europe to sustain availability of these units.

For customers operating legacy machinery with PMA Series drives embedded in multi-axis gantry systems or rotary indexing tables, DriveKNMS offers cross-reference analysis to identify compatible B-series replacements where A-series units are no longer obtainable. All cross-reference recommendations are validated against published Sanyo Denki compatibility matrices and customer-supplied wiring documentation before confirmation.

Quality Control for the PMA Series Range

PMA Series drivers incorporate a multi-layer PCB backplane with integrated current sense resistors and gate driver ICs that require function-specific test procedures. DriveKNMS applies the following verification protocol to all PMA Series units processed through its facility:

1. Visual and mechanical inspection: Connector pin integrity, heat-sink mounting torque, capacitor ESR visual check.
2. Power-on current draw baseline: No-load input current measured against factory specification at rated input voltage.
3. Pulse-input response test: Step pulse injected at 1kHz and 10kHz; output phase current waveform verified on oscilloscope for correct microstepping profile.
4. Thermal cycling: Unit operated at 80% rated current for 30 minutes; thermal imaging confirms no abnormal hotspot on power stage MOSFETs.
5. Alarm output verification: Overcurrent and overvoltage alarm outputs tested by controlled fault injection.
6. Final functional sign-off: Unit paired with a reference Sanyo Denki stepping motor and run through a 500-cycle positioning sequence; position error logged and compared to specification tolerance.