Novotechnik RSC-2800 in India: Interfaces, Variants and How to Order

The RSC-2800 is one of the most frequently specified Novotechnik rotary sensors in India, and one of the most frequently mis-ordered. The reason is simple: RSC-2800 is not a product, it is a family. Six interface options, three protection bands, an unusually wide temperature range and optional redundancy mean that two units carrying the same series name can behave quite differently on the machine.

This guide walks through the decisions that set the ordering code, so that what arrives is what your control system expects.

What the RSC-2800 is

It is an absolute, non-contacting rotary sensor built on Novotechnik NOVOHALL magnetic technology. Absolute means it reports true shaft angle immediately at power-up, with no homing move and no reference run. Non-contacting means there is no wiper riding on a resistive track, which removes the dominant wear mechanism in traditional potentiometric rotary sensors.

That combination is why it turns up on mobile machinery, on automotive test rigs, and on plant equipment where a sensor failure means a shutdown rather than an inconvenience. There is no mechanical contact in the measuring path to wear out.

Decision one: the interface

This is the choice that most often goes wrong, because the series supports six and the label does not always make the difference obvious.

• Voltage output — the default assumption for most PLC analogue input cards. Simple, well understood, and sensitive to cable length and ground offset over long runs.
• Current output — the right answer whenever the cable run is long or the environment is electrically noisy. A current loop does not care about voltage drop down the cable, which in an Indian plant with a 40 metre run back to the panel is usually the deciding factor.
• Ratiometric — output scales with supply voltage rather than holding an absolute value. Correct when the receiving controller shares and measures the same supply, wrong when it does not. Worth checking carefully, because a ratiometric unit fed into a fixed-scale input reads plausibly but drifts with supply.
• SSI — synchronous serial, for absolute digital position without analogue conversion losses. Choose this when resolution matters and the controller supports it.
• Incremental — pulse output, for retrofits into counters and drives already built around incremental feedback.
• SPI — for direct integration into embedded electronics rather than a plant PLC.

If you are replacing an existing sensor, match the interface to what the controller is wired for, not to what seems technically better. An upgrade from voltage to SSI is a control system change, not a sensor swap.

Decision two: protection rating

The RSC-2800 is available from IP54 up through IP65 and IP67. The practical guidance:

• IP54 is adequate inside a reasonably clean enclosure, where the sensor sees dust but never direct water.
• IP65 handles hose-down and general plant wash.
• IP67 covers temporary immersion — the right choice for mobile machinery, outdoor installation, and anywhere monsoon exposure is realistic.

Specify by the worst case the unit will actually see, not the normal condition. The failure mode for an under-rated sensor is water ingress at the cable entry, and it typically appears months after commissioning.

Decision three: temperature range

The series covers from below minus 40 degrees Celsius up to above plus 85. Very few Indian applications need the cold end, but the hot end matters more than people allow for. A sensor mounted near a furnace, on a hydraulic power pack, or inside an unventilated panel in a Gujarat summer can sit far above the ambient air temperature. Measure at the mounting point in the worst month rather than taking the plant ambient figure.

Decision four: redundant outputs and E1 approval

Two options exist on this series that are worth knowing about before you need them.

Redundant outputs provide two independent measuring channels in one housing, so a controller can cross-check them and detect a fault rather than acting on a wrong reading. If the angle measurement feeds anything safety-related, raise this at the enquiry stage — retrofitting redundancy means changing the sensor.

European E1 type approval is available on this series. If you are building vehicles or mobile machinery for export, confirm whether your compliance route requires it before you order.

Mechanical fit

The RSC-2800 is a shaft-type design. The mating question is the coupling: a rigid coupling transfers any shaft misalignment straight into the sensor bearing and shortens its life, so a flexible or backlash-free coupling is normally the right choice. If you are replacing a blind hollow shaft unit, note that RSC-3200 is the hollow-shaft member of the same family. Novotechnik no longer recommends it for new designs, so treat it as a like-for-like replacement part rather than a specification for a new machine, and ask us for the current equivalent.

Ordering

Send us whichever of these you have and we will return the full ordering code with a price and a drawing:

• Measured angle range in degrees
• Output type, and the controller or input card it feeds
• Supply voltage available at the sensor
• Protection rating required, and whether washdown occurs
• Worst-case temperature at the mounting point
• Whether redundant outputs are needed
• The existing part number and a photograph of the label, if this is a replacement

Accent Controls is the sole authorised Novotechnik distributor for India and SAARC, so the quotation covers factory warranty and traceable supply. See also our guide to checking you are buying authorised Novotechnik stock, and the wider single-turn rotary sensor range.