RSM-2800 Analog 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 analog multiturn encoder. True-Power-On multiturn sensor.

True-Power-On multi-turn rotary sensor, magnetic and contactless (GMR magnetoresistive technology), Ø 28 mm. Measuring range of 2 to 16 turns. Absolute position; detects turns without power or backup battery.

Key points

Magnetic, contactless
Measuring range from 720° to 5760° in 360° steps (2 to 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 %
Single and multi-channel versions

Technical Frequently Asked Questions

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

The order code has 6 fields: mechanical version, turns, Ub, parameters, characteristic, and connection. For example, RSM-2832-010-211-202 is the version with a 6 mm diameter shaft with a flat surface, IP65 rating, 10-turn output characteristic, Ub = 5 VDC, 0.25 … 4.75 V ratiometric output, clockwise increments, and a 1 m long, 4-pole 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 analog multi-turn encoder operate?

Operating temperature: -40 … +85 °C (M12 connector: -25 °C). Protection: IP54 / IP65 / IP67.

Properties

Feature	Specification
Measurement data
Measuring range	0 … 720° to 0 … 5760° (360° steps)
Resolution	16 bits
Repeatability	≤ ±0.5°
Hysteresis	≤ ±1°
Start-up time	typical 10 ms
Response time	max. 2 ms
Common data
No-load current consumption	typical 30 mA
Reverse polarity protection	Yes (power lines and outlets)
Short circuit protection	Yes (in front of GND and Ub)
Insulation resistance (500 VDC)	≥ 10 MΩ
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
Noise radiation, EN 55011	Class B
General data and environment
Working temperature	-40 … +85 °C (M12 connector: -25 °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)
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	4 x 0.5 mm² (AWG 20) TPE cable, shielded, or M12x1 connector with 0.15 m cable
Preferred rates
Box	Preferred shares
Mechanical version	2832 · 2841
Turns of the characteristic	003 · 006 · 010 · 016
Supply voltage Ub	1 · 2
Preferred rates
Box	Preferred shares
Parameters	1 (voltage and ratiometric) · 2 (current)
Output characteristic	1 · 3
Electrical connection	202 · 206 · 501

Option	Meaning
Example: RSM-2832-010-211-202 = Ø 6 mm shaft with flat surface, IP65, 10-turn output characteristic, Ub = 5 VDC, ratiometric output of 0.25 … 4.75 V, clockwise increasing, 4-pole shielded cable, 1 m.
1 · Mechanical version
2801 · 2831 · 2861	Shaft Ø 6 mm with marking, IP54 · IP65 · IP67 (*)
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
002 … 016	From 2 to 16 turns, in steps of 1 turn: X turns correspond to an angle of measurement of X · 360°
003 · 006 · 010 · 016	3, 6, 10 and 16 laps
3 · Supply voltage Ub
2	5 VDC (ratiometric)
1	24 VDC (voltage and current)
4 · Interface parameters
1	Ub = 5 V: 5 … 95 % ratiometric. Ub = 24 V: 0.1 … 10 V
2	Ub = 5 V: 10 … 90 % ratiometric. Ub = 24 V: 4 … 20 mA
5 · Output characteristic
1	Clockwise increasing
2	Crescent in a counterclockwise direction
3	Cross outputs, channel 1 increasing clockwise (not current)
6. Electrical connection
201 · 202 · 206 · 210 · 220	Shielded 4-pole cable: 0.5 · 1 · 3 · 5 · 10 m
501	M12x1 4-pin connector with 0.15m shielded 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.