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MR430-1 Controller

FiSens Sensor Chain


Controller Module

The MR430-1 POF Controller Module is the active optical and electrical interface for the MR430 series ZapFREE® Fiber Optic Absolute Position Sensor System. The module incorporates multiple built-in interfaces for compatibility with PLCs, motor drives and other motion control systems.



The following is a summary of MR430-1 performance specifications when used to operate the MR431 Sensor. Consult separate MR430 Instruction Manual for detailed performance and interface information.

Position Measurement
Single Turn Resolution 13 bits (8192 counts, 0.044°)
Multi-Turn Tracking Up to 12 bits (4096 turns)
Electrical Interfaces
SSI Up to 25 bits (13 bits ST + 12 bits Multiturn), Programmable baudrate 25 kHz -250 kHz
RS485/Modbus RTU 56,200 Baud Default, Consult instruction manual for software protocol details
USB USB, Disables Modbus interface when used, Assigned Virtual Com Port
Current Output (I+/I-) Isolated 4-20mA (270V isolation maximum), Output scalable by user. Accuracy = +/- 0.08% Full Scale
Voltage Output (Vout) -10V to +10V, Output scalable by user, Accuracy = +/-0.25% Full Scale
Digital Output (OUT) 0-5V maximum, 5 mA Load, Programmable Set Point
Digital Inputs (HOME and AUXin) +24V logic
Power Supply +18 VDC to +32 VDC, 65 mA max at 24 VDC
Interface Update Rate
Angular Speed (É) 230 radians/second or 2200 RPM for accurate position reporting
Update Rate 1.17 kHz (850 μs)
Reporting Delay

SSI: Maximum 800 μs (time from actual position to SSI output)

Analog Outputs: Maximum 1.0 ms

Optical Interface
Interface Duplex, M-POF Assembly
Maximum Optical Link Length Up to 30 m (100 ft) with MR431 Sensor
Environmental Performance
Temperature/Humidity Operating: -5°C to +55°C (23°F to 131°F), Storage: -25°C to +65°C (-13°F to 149°F), 25-95% RH (non-condensing)
Ingress Protection IP40
Physical Attributes
Housing Dimensions 114 mm W x 89 mm D x 32 mm H, includes 35mm DIN rail mount
Unit Weight 230g (8.1 oz)

Specifications subject to change without notice


  • Absolute 0-360° position sensor with 13-bit resolution
  • Multi-turn tracking to 8192 turns
  • Sensor can be installed in any manner of hazardous location or explosive atmosphere – gas, dust or mines
  • Controller is installed outside the hazardous area
  • Interference-free transmission up to 30 meters


  • SSI Interface
  • USB interface
  • RS485/Modbus RTU serial interface
  • Programmable 4-20mA output
  • Programmable ±10V output
  • Programmable Digital Set Points
  • National Instruments LabVIEW™ drivers available


Call +1-805-389-6600 or email

Ordering Information

MR430-1 DIN rail mount controller
MR430-99-01 SSI/RS485 Interface (J2) Pigtail Assembly, L=1m

Quick Ship Configurations

MR430-1 DIN rail mount controller
MR430-99-01 SSI/RS485 Interface (J2) Pigtail Assembly, L=1m
MR431-A06 Sensor with 6mm OD Shaft
MR431-1101 Set of 3x synchro clamps and screws
MR439-P03 M-POF Sensor Cable, 3m
MR439-P05 M-POF Sensor Cable, 5m
MR439-P10 M-POF Sensor Cable, 10m

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