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Accessories and Options for Motors

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KS corrosion protection and OS surface protection
SEW‑EURODRIVE offers various optional protective measures which, when combined, provide optimal protection for the operation of motors and gearmotors under special ambient conditions.

KS corrosion protection
KS corrosion protection for motors comprises the following measures:

Surface protection
Instead of standard surface protection, motors and gear units are optionally available with OS2 or OS4 surface protection.

This makes the gearmotors well equipped for operation under various ambient conditions.

Detailed coatings options.

Brake options - BM / BMG / BR brakes
On request, SEW-EURODRIVE motors and gearmotors can be supplied with an integrated mechanical brake. The brake is a DC electromagnetic disc brake that is released electrically and applied with spring force. The brake is applied in case of a power failure.

It meets the basic safety requirements. The brake can also be released mechanically if equipped with manual brake release. For this purpose, the brake is supplied with either a hand lever with automatic reset or an adjustable setscrew. The brake is controlled with a brake control that is either installed in the motor wiring space or the control cabinet.

Additional options
Factory installed connector AFL/AFQ
Accessories and Options for Motors
Optional for DRN series AC motors and AC brake motors. The installed AFL/AFQ connectors are based on industry standard M22 (AFL) and M25 (AFQ) round power connectors. Prefabricated cable systems are available from a variety of suppliers to simplify installation and maintenance.
Incremental encoder type EH / ES / EV
Optional for DRN series AC motors and AC brake motors. SEW-EURODRIVE incremental encoders output 1024 signals/revolution. They have two signal tracks and one index signal track.
Incremental encoders are available as hollow shaft encoders, spreadshaft encoders and solid shaft encoders with coupling. Signal output: TTL or sin/cos.
Encoder mounting device for type ES / EV
Optional for DRN series AC motors and AC brake motors The motors can be equipped with various encoder attachment fittings for mounting devices from different manufacturers.
Mounting devices for encoders are intended for spreadshaft encoders with an 8 mm (0.3 in) or 10 mm (0.39 in) center bore and for solid shaft encoders (synchronous flange).
Absolute encoder type AV1Y / AV1H
SEW-EURODRIVE AV1Y and AV1H absolute encoders are combination encoders. They contain a multi-turn absolute encoder and a high-resolution sinusoidal encoder. You can choose between an SSI interface or a HIPERFACE® interface for data transmission of absolute values. The AV1H absolute encoder has an electronic nameplate.
Forced cooling fan type VR / VS / V
DRN series AC motors and AC brake motors can be equipped with a forced cooling fan on request. A forced cooling fan is usually not required for mains operated motors in continuous duty. SEW-EURODRIVE recommends a forced cooling fan for the following applications:
  • Drives with high starting frequency
  • Drives with additional flywheel mass Z (flywheel fan)
  • Inverter drives with a setting range ≥ 1:20
  • Inverter drives that must also generate rated torque at low speeds or even when stationary
Additional flywheel mass Z
DRN series AC motors and AC brake motors can be equipped with additional flywheel mass Z (flywheel fan) to facilitate smoother starting and braking response from mains-operated motors. The fan gives the motor an additional mass moment of inertia JZ. The flywheel fan replaces the normal fan and does not affect the external dimensions of the motor.
RS backstop
DRN series AC motors and AC brake motors can be equipped with a backstop if required. The backstop is used for protecting equipment against reverse movement when the motor is switched off.
Protection canopy C
Optional for DRN series AC motors and AC brake motors. Liquids and/or solid foreign objects can penetrate the air inlet openings of motors when motors are mounted vertically with their input shaft pointing downwards.

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