RSM-2800 SPI Contactless Magnetic Multi-Turn Encoder

Manufacturer: Novotechnik
Category: Displacement, Encoder, Absolute Encoder, Multi-turn Absolute Encoder, Absolute Magnetic Encoder, Angular displacement sensor, SENSORS

Novotechnik RSM-2800 SPI magnetic multiturn encoder. True-Power-On multiturn sensor.

Sensor rotativo multivuelta True-Power-On, magnético y sin contacto (tecnología magnetorresistiva GMR), Ø 28 mm. Rango de medida de 2 a 16 vueltas. Posición absoluta; detecta las vueltas sin alimentación ni batería de respaldo.

Key points

Magnético, sin contacto
Measuring range of 5040° or 5760° (14 or 16 turns)
True-Power-On System: Counts laps without power; no gears or batteries
With press-fit coupling or with marked shaft
IP54 to IP67 protection
16-bit resolution; linearity up to ±0.03 %

Technical Frequently Asked Questions

What can be connected to the RSM-2800 SPI magnetic multi-turn encoder?

It can be connected to Novotechnik M12 connectors and cables and Novotechnik rotary sensor couplings and accessories.

How do I order the RSM-2800 SPI magnetic multi-turn encoder?

The order code has 5 fields: mechanical version, turns, Ub, parameters, and connection. For example, RSM-2832-214-281-302 is the version with a 6 mm diameter shaft with a flat surface, IP65 rating, 14 turns (5040°, controlled range), Ub = 5 VDC, 16-bit SPI in binary code, clockwise increments, and a 5-pole, 1 m shielded cable. All the options for each field are available in the order code configurator on this page.

Under what conditions does the RSM-2800 SPI magnetic multi-turn encoder operate?

Operating temperature: -40 … +85 °C. Protection: IP54 / IP65 / IP67.

Properties

Feature	Specification
Measurement data
Measuring range	14 turns (5040°, controlled range) or 16 turns (5760°, uncontrolled range)
Protocol	SPI
Code	Binary
Resolution	16 bits across the entire measurement range
Absolute linearity, 14 turns	≤ ±0.036 % FS
Absolute linearity, 16 turns	≤ ±0.031 % FS
Repeatability	≤ ±0.5°
Hysteresis	≤ ±1°
Electrical data
Level	TTL (see «Multiturn SPI Detail» manual)
Update frequency (internal)	1 kHz
Temperature error	±0.1 % FS
Supply voltage Ub	5 VDC (4.5 … 5.5 VDC)
No-load current consumption	typical 25 mA
Reverse polarity protection	Yes (power lines and outlets)
Short circuit protection	Yes (in front of GND and Ub)
Maximum clock frequency	100 kHz
Insulation resistance (500 VDC)	≥ 10 MΩ
MTTF (IEC 60050)	193 years
General data and environment
Working temperature	-40 … +85 °C
Maximum working speed	800 rpm
Vibration IEC 60068-2-6	20 g, 5 … 2000 Hz, Amax = 0.75 mm
IEC 60068-2-27 Shock	50 g, 6 ms
DIN EN 60529 protection	IP54 / IP65 / IP67
Insensitivity to DC magnetic fields	< 15 mT
Life	> 50 million movements (mechanically)
Electromagnetic compatibility
ESD, EN 61000-4-2 (contact and air discharge)	4 kV, 8 kV
Electromagnetic fields (RFI), EN 61000-4-3	10 V/m
Rapid transients (burst), EN 61000-4-4	1 kV
Conducted disturbances (HF fields), EN 61000-4-6	10 V ef.
Magnetic fields, EN 61000-4-8	30 A/m
Radiated disturbances, EN 55016-2-3	Industrial and residential area
Mechanical data
Housing	PPS-GF40/SF50 temperature resistant plastic
Axis	Stainless steel X8CrNiS18-9 (No. 1.4305)
Fixation	2 M4 screws with washers; max. tightening torque 180 Ncm
Bearing	Sintered bronze bushing
Mechanical tour	Continuous
Allowable load on the shaft (static or dynamic), axial and radial	20 N
Starting torque	0.15 Ncm (IP54), 0.5 Ncm (IP65), 1.0 Ncm (IP67)
Weight	approx. 50 g
Electrical connection	5 x 0.14 mm² (AWG 26) PUR cable, shielded
Connection assignment
Sign	Cable 3..
Supply voltage Ub	GN
GND	BN
MISO	YE
SCLK	GY
/SS (slave selection)	WH
Preferred rates
Box	Preferred shares
Mechanical version	2832 · 2841
Turns of the characteristic	214
Supply voltage Ub	2
Preferred rates
Box	Preferred shares
SPI parameters	81
Electrical connection	302

Option	Meaning
Example: RSM-2832-214-281-302 = Ø 6 mm shaft with flat, IP65, 14 turns (5040°, controlled range), Ub = 5 VDC, 16-bit SPI in binary code, clockwise increasing and 5-pole 1 m shielded cable.
1 · Mechanical version
2802 · 2832 · 2862	Shaft Ø 6 mm with flat surface, IP54 · IP65 · IP67
2821 · 2841 · 2871	Pressure coupling, IP54 · IP65 · IP67
2 · Turns of the output characteristic
214	14 turns (5040°), controlled measuring range
216	16 turns (5760°), uncontrolled measuring range
3 · Supply voltage Ub
2	5 VDC
4 · SPI parameters
81	16-bit SPI, binary code, clockwise increasing
82	16-bit SPI, binary code, increasing counterclockwise
5 · Electrical connection
302	1m shielded 5-pole cable
The code is formed using one option from each field, in the order shown in the example. Contact us and we will confirm the exact reference.