SiemensSimodrive 210 DC Feed Drive Closed-Loop Analogue Control PCB, 3 Axes, Drawing 462 110.9070.21

Product Description

What this part is

A Siemens 6RB2100-0NA21 — the closed-loop analogue control PCB for a Simodrive 210 DC feed drive, in the three-axis configuration. It carries the speed and current regulators for the feed axes: it takes the analogue speed command from the CNC, closes the loop against tachometer feedback and issues the firing commands to the DC power section. It is a regulator board, not a power stage and not a power supply.

Decoding the order code

6RB2 — Siemens Simodrive 210 DC feed drive family.

100 — control electronics (Funktionsbaugruppe / control PCB) group.

0NA21 — closed-loop analogue regulation, three axes.

462 110.9070.21 — the Siemens internal board drawing number silkscreened on the PCB.

Published specifications

Type: feed-drive closed-loop control PCB (regulator board).

Drive family: Simodrive 210, DC feed drive.

Axes served: 3.

Control method: analogue closed loop — speed regulation against tachogenerator feedback, with current/torque limit.

Command interface: analogue speed setpoint from the CNC.

Internal drawing number: 462 110.9070.21.

Form: plug-in / rack-mounted PCB within the Simodrive drive chassis.

Origin: Germany (Siemens nameplate).

What these specs mean in practice

Three axes on one board means one board failure takes three feed axes with it — and equally, one board covers three axes, so you need fewer spares than an axis-per-card architecture suggests. Because the loop is analogue and closed on a tachogenerator, drift and gain faults show up as axis hunting or following error rather than as a hard alarm; the regulator trim pots on this generation of board are set to the machine.

What is not included

Control PCB only. The listing title notes “no module” — there is no power module, no drive chassis or rack, no power supply or voltage-clamping module, no pulsed (braking) resistor, no motor, no tachogenerator, no ribbon or signal cables, no connector kits or terminal boards, and no documentation.

Quantity and configuration

Sold as one control board.

Interchange guidance

6RB2100-0NA21, 6RB21000NA21 and 6RB2100 0NA21 are the same board. 6RB2100-0NA01 is a different configuration within the same DC family. The similarly numbered 6SC6100-0NA21 (drawing 462 010.9070.21) is the AC Simodrive 610 analogue control board — a genuinely different part despite the near-identical tail, and the commonest mis-order on this product. Related sizes and configurations exist for one- and two-axis service; those are different boards, not equivalents.