RexrothHNC100 Single-Axis Digital NC Controller for Electro-Hydraulic Axes, 18–36 VDC, 8 Digital In / 8 Digital Out, Wall-Mount

Product Description

The HNC100 is a programmable digital NC axis controller built specifically for closed-loop control of hydraulic drives, with the option of controlling electrical drives as well. This is the single-axis version. It is not a robot controller and not a servo amplifier — it is the closed-loop controller that sits between a PLC and a servo, proportional or high-response valve, reads a position transducer and a pressure transducer, and executes an NC program.

What it actually controls

Configurable controller variants published for the HNC100 family include a position controller (PDT1), a pressure/force controller (PIDT1 with the I-component switchable in and out by window and its own scan rate), a velocity controller (PI), position-dependent braking, alternating position/pressure control, and synchronisation control for two axes. Monitoring covers dynamic following-error, electronic traversing limits, and cable-break detection for incremental, SSI and 4–20 mA transducers — on a fault the “no error” output resets and the controller is deactivated.

Why a dedicated hydraulic controller rather than a PLC loop:
A hydraulic axis is non-linear, compressible and asymmetric between extend and retract. That is why this controller offers direction-dependent gain adjustment, an “inflected” gain characteristic, zero-point error compensation, residual-voltage handling and command-value feedforward — features a generic PLC PID loop does not have, and the reason presses and transfer lines used these instead of scan-rate-limited ladder logic.

Verified from the unit itself

The housing is silk-screened HNC100. The power terminal is marked shield / GND / 18-36V, confirming the 18–36 VDC supply. The front panel carries OUT 1-8 and IN 1-8 terminal rows — i.e. the 8-digital-in / 8-digital-out variant, not the 16 or 24 I/O build — plus an encoder port, X5, COM 1, COM 2, a local CAN connection, and 5V/CPU/RUN status LEDs. Mounting flanges top and bottom indicate the wall-mount housing rather than the rack-mount version.

Programming

Configuration is done on a PC with Rexroth’s WIN-PED software — an NC editor with syntax check and compiler, machine-data dialogues, on-line parameter setting and four-channel process-variable recording. Data sets are downloaded over the serial interface. A hand-held control box (BB-3) or control panel (BF-1) can be used for quick data changes on the machine. Neither WIN-PED nor the interface cable is included with this item.

Series caution — read before you order

This unit is a component-series 1X build. The current published Rexroth data sheet (RE 30131) covers component series 2X, and its ordering code, dimensions, weight and pin assignments are stated for 2X only. Physical dimensions, weight and the exact meaning of the trailing /110 designation for the 1X series are therefore left blank rather than borrowed from the 2X data sheet. Confirm bus interface (Profibus DP, CANopen, INTERBUS-S, SERCOS or none) and the transducer configuration against the label on your unit — the interface option is part of the ordering code and is not interchangeable.

Applications and interchange

Machine tools, plastics processing machines, special machines, presses, transfer lines and rail-bound vehicles. Also written VT-HNC100-1-11/110, VT HNC100 1 11/110, VTHNC100111110, VT-HNC 100-1X/110, HNC100-1. The carton and record designation Mannesmann is retained: this product was sold as Mannesmann Rexroth before the Bosch Rexroth merger, and both designations are correct for the same part.

Source-data note: the previous description called this “an industrial robot part… for controlling the motion of industrial robots”. The HNC100 is an electro-hydraulic axis controller; that has been corrected. The brand field previously read “Mannesman” (single terminal n) and has been corrected to Bosch Rexroth with Mannesmann Rexroth retained as the legacy name.