Yaskawa SGD7S-1R6A00A Sigma-7 SERVOPACK 200W Servo Amplifier

Analog and Pulse Train Servo Amplifier for Yaskawa Sigma-7 Axes

Specifications

Industrial Applications

• Conventional PLC-based motion control — position axes driven by pulse train output and speed or torque axes driven by an analog voltage, with no motion network on the machine.
• Electronics and semiconductor equipment — placement heads, dispensing valves, wafer handling stages and inspection axes.
• Packaging and converting machinery — film feed, sealing, cutting and labelling axes on machines that do not use a servo network.
• Small engraving machines, precision X-Y stages and test rigs in the 200 W class.
• Machine tools and metalworking equipment — auxiliary axes, indexers, tool changers and feed drives.
• Like-for-like replacement on existing Sigma-7 machines: swapping a single failed amplifier where the controller already issues pulse and analog commands.

Tell us the machine, the axis and the controller type and we confirm whether this rating and command interface are the right match before you order.

Design Purpose

The SGD7S SERVOPACK is the amplifier stage between the controller and the servomotor. On this analog voltage / pulse train model the host controller issues commands directly — a pulse train for position, an analog voltage for speed or torque — rather than sending them over a motion network. The amplifier converts those commands into precisely regulated motor current using IGBT-based PWM with sine-wave current drive, and closes the loop with serial encoder feedback coming back from the motor. The job is not simply to vary speed; it is to hold position, regulate speed and limit torque accurately and repeatedly. That is the fundamental difference from the variable-frequency drives in this catalog: a VFD varies the speed of an induction motor for fans, pumps and conveyors, while this servo amplifier closes a high-resolution loop around a servomotor for motion control.

The interface code is what defines this variant. Within the same 1.6 A rating, order code 00 is the analog voltage / pulse train model, 10 is the MECHATROLINK-II model, 20 is the MECHATROLINK-III model and A0 the EtherCAT model. All four drive the same class of motor at the same power, but only one matches the way your controller talks to the axis — so the amplifier must be chosen on the command interface, not on the power rating. This is the model for machines where a PLC or positioning module issues the commands directly.

Performance comes from the Sigma-7 platform: a 3.1 kHz speed frequency response, ripple compensation and vibration suppression for stable settling, and safe torque off rated SIL 3 / PL-e Cat 3 built into the standard product, with SS1, SS2 and SLS available for machines that need controlled stopping and speed limiting.

One design point matters when planning the installation. This rating has no built-in regenerative resistor, and none is supplied with the amplifier. Axes with high inertia, vertical loads or frequent emergency stops need an external regenerative resistor, and the minimum allowable external resistance is 40 Ω.

Common Failure Modes

• Overvoltage or regenerative overload alarm — frequent emergency stops, vertical axes and high-inertia loads push regenerated energy back into the DC bus. Because this rating has no built-in regenerative resistor, a correctly sized external resistor is usually the fix.
• Overcurrent alarm — a shorted motor or encoder cable, a grounded motor winding or a mechanically jammed load drives protective shutdown.
• Axis does not move or drifts on pulse command — wrong pulse output format on the controller, disturbed pulse wiring or incorrect analog scaling on speed and torque commands.
• Feedback or encoder alarm — damaged encoder wiring, contamination or electrical noise interrupts the closed loop, leaving the axis unable to hold position.
• Servo not ready with no alarm cleared — the safe torque off circuit is open or the EDM wiring is incorrect, so the amplifier refuses to enable.
• Main-circuit supply error or undervoltage alarm — supply dips, loose terminals or a failed contactor drop the bus below the amplifier's threshold.
• Thermal fault / overheating — blocked ventilation, high ambient temperature or a heatsink loaded with dust raises internal temperature.
• Parameter loss after replacement — cleared or corrupted parameters leave the amplifier unable to run the axis.

If your amplifier displays a specific alarm code, send us the exact code together with the servomotor model, the controller type and the load description — we will help diagnose the fault and quote the matched replacement.

Why Choose Us

• Specialised in industrial robot and motion spare parts for ABB, FANUC, KUKA and YASKAWA.
• We supply the exact Yaskawa unit SGD7S-1R6A00A (Sigma-7 SERVOPACK, 0.2 kW / 1.6 A, analog voltage / pulse train, design revision A), matching the number in your equipment records.
• We check the command interface before quoting, so you do not receive a network model when your controller issues pulses, or a pulse model when your controller runs MECHATROLINK.
• We flag the parts that are not in the box — the external regenerative resistor in particular — so your installation is not held up waiting for a second shipment.
• Each unit is inspected and functionally checked, then packed to protect the terminals and housing, with full order tracking from Shanghai.
• Technical support for drive selection, commissioning guidance and alarm diagnosis; repair service offered for defective units.
• Quote-based service — send your inquiry with the motor model, controller type, command interface, load description and required condition for a matched offer.

Related Products

• SGM7J-02A7C6S — Yaskawa Sigma-7 rotary servomotor, 200 W, 3000 rpm, 0.637 N·m, absolute encoder; the standard motor pairing supplied with this amplifier rating. Send us your motor nameplate so we can confirm the exact match.
• SGD7S-1R6A10A — the same 0.2 kW / 1.6 A rating with the MECHATROLINK-II communications interface; the direct comparison when your controller drives the axis over a motion network.
• SGD7S-1R6A20A — the same rating with the MECHATROLINK-III communications interface for high-speed networked motion control.
• SGD7S-2R8A00A — Sigma-7 SERVOPACK one rating up at 0.4 kW / 2.8 A, same analog voltage / pulse train interface when your axis needs more current.
• SGD7S-1R6A00A002 — the same amplifier with the varnished hardware option, for humid, dusty or mildly corrosive cabinets.
• External regenerative resistor for SGD7S-1R6A ratings — required where regenerated energy exceeds the permissible value, minimum allowable resistance 40 Ω, and not supplied with the amplifier. Send us your load inertia and duty cycle and we size and quote the resistor with the drive.