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IFM RMA300 Absolute multiturn encoder with hollow shaft


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SKU: RMA300 Categories: , Tag:


  • Absolute position traceability even when unpowered
  • Bearing operating time measurement for efficient maintenance planning
  • Freely programmable total resolution u
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Product characteristics
Resolution 65536 steps; 32768 revolutions; 31 bit
Communication interface IO-Link
Shaft design hollow shaft open to one side
Shaft diameter [mm] 12
Function principle absolute
Revolution type multiturn
Electrical data
Operating voltage [V] 18…30 DC; (to PELV)
Rated insulation voltage [V] 30
Current consumption [mA] < 75
Protection class III
Reverse polarity protection yes
Max. power-on delay time [ms] 1000
Max. revolution electrical [U/min] 12000
Short-circuit protection yes
Measuring/setting range
Resolution 65536 steps; 32768 revolutions; 31 bit
Accuracy / deviations
Accuracy [°] 0.1
Software / programming
Parameter setting options preset; zero point; direction of rotation; rotational speed
Communication interface IO-Link
Transmission type COM3 (230,4 kBaud)
IO-Link revision 1.1
SDCI standard IEC 61131-9 CDV
Profiles Identification and Diagnosis; Switching Signal Channel;
Measurement Data Channel (high resolution)
SIO mode no
Required master port type A
Min. process cycle time [ms] 2.3
IO-Link process data (cyclical)
function bit length
process value 96
device status 4
binary switching information 5
IO-Link functions (acyclical) application specific tag; operating hours counter; internal temperature; switching cycles counter
Supported DeviceIDs
Type of operation DeviceID
Default 1064
For further information please see the IODD PDF file under “Downloads”
Operating conditions
Ambient temperature [°C] -40…85
Storage temperature [°C] -40…85
Max. relative air humidity [%] 98; (condensation not permissible)
Protection IP 65; (on the housing: IP 67; on the shaft: IP 64)
Tests / approvals
DIN EN 61000-4-2 ESD 4 kV CD
DIN EN 61000-4-3 HF radiated 10 V/m
DIN EN 61000-4-4 Burst 2 kV
DIN EN 61000-4-6 HF conducted 10 V
Vibration resistance
DIN EN 60068-2-6 10 g / 10…1000 Hz half-sine
Shock resistance
DIN EN 60068-2-27 100 g 6 ms
Continuous shock resistance
DIN EN 60068-2-29 10 g / 16 ms half-sine
Vibration resistance
30 g (10…1000 Hz)
MTTF [years] 283
UL approval
power supply Class 2
Mechanical data
Weight [g] 244.9
Dimensions [mm] Ø 36 / L = 54.2
Materials flange: aluminium; housing: stainless steel (1.4521 / 444)
Max. starting torque [Nm] 1
Reference temperature torque [°C] 20
Shaft design hollow shaft open to one side
Shaft diameter [mm] 12
Shaft material
stainless steel
Max. shaft load axial (at the shaft end) [N] 40
Max. shaft load radial (at the shaft end) [N] 110
Installation depth of shaft [mm] 18
Max. axial shaft misalignment [mm] 0,5
Fixing flange clamping flange
Electrical connection – plug
Connector: 1 x M12; coding: A; Moulded body: stainless steel (1.4401 / 316)

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