MR361 Series
Fiber Optic Transmission Link
For Incremental Encoders
Data Sheet and User Guide
Doc No: 98-0361-01
Revision B, Released 5/5/2015
Camarillo, CA 93012 USA Tel
For Sales & Support in Europe:
MICRONOR INC.
900 Calle Plano
+1-805-389-6600
Fax +1-805-389-6605
sales@micronor.com
www.micronor.com
MICRONOR AG
Pumpwerkstrasse 32
CH-8105 Regensdorf
Switzerland
Tel +41-44-843-4020
Fax +41-44-843-4039
sales@micronor.ch
www.micronor.ch
Notice of Proprietary Rights
The design concepts and engineering details embodied in this manual, which are the property of
MICRONOR INC., are to be maintained in strict confidence; no element or detail of this manual is to
be spuriously used, nor disclosed, without the express written permission of MICRONOR INC. All
rights are reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, without prior written permission from MICRONOR INC.
© Copyright 2014-2015, Micronor Inc.
Camarillo, CA USA
MICRONOR
Revision History
Revision
Date
Notes
A
8/11/2014
Original Release (English), Author: DNH/Micronor Inc.
B
5/5/2015
Part Number Correction
File Name
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98-0361-01_MR361_Instruction_Manual_revB_Released_150505.docx
9770.30.170 should be 9770.30.160
Page 2 of 19
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Table of Contents
1. Product Description ................................................................ 4
1.1. Fiber Optic Transmission Link for Incremental Encoders ................................................ 4
1.2. Fields of Application ........................................................................................................... 4
1.3. Features .............................................................................................................................. 5
2. Ordering Information ............................................................... 6
3. Standard Contents ................................................................... 6
4. Installation and Operation ...................................................... 7
4.1. Mounting Modules on DIN Rail.......................................................................................... 7
4.2. Fiber Optic Connections to the Modules .......................................................................... 8
4.3. Electrical Connections to the Module ............................................................................... 9
4.4. System Start-Up & Performance Check .......................................................................... 10
5. Troubleshooting .................................................................... 12
5.1. Potential Issues & Solutions ............................................................................................ 12
5.1.1. XMTR Power Green LED not ON when controller powered .................................... 12
5.1.2. RCVR Link Status LED not ON when controller powered ....................................... 12
5.1.3. RCVR Link Status LED Blinks ................................................................................... 12
5.1.4. RCVR Encoder Outputs not working but both LEDs On .......................................... 12
5.2. Damaged In Shipment ..................................................................................................... 13
6. Warranty Information ............................................................ 14
7. Specifications ........................................................................ 15
8. Theory of Operation .............................................................. 17
9. Applications ........................................................................... 18
9.1. Using unused XMTR inputs for signaling inputs. ............................................................ 18
10. Mechanical Reference Drawing ............................................ 19
Table of Figures
Figure 1. MR361 Series Fiber Optic Link shown in use with 24 VDC HTL/Push-Pull
Incremental Encoder and Medium Voltage Drive ................................................. 4
Figure 2. Modules mount on standard 35mm DIN rail ............................................... 7
Figure 3. Close up of DIN rail adapter on module ....................................................... 7
Figure 4. ST Optical Interface on Module ..................................................................... 8
Figure 5. Module shown with supplied Phoenix Combicon® Wiring Plugs ................ 8
Figure 6. How to terminate XMTR inputs or RCVR outputs ....................................... 10
Figure 7. Meaning of Status LED on XMTR and RCVR Modules ............................... 11
Figure 8. Theory of Operation of MR361 Fiber Optic Encoder Link System ............ 17
Figure 9. How to use unused XMTR inputs for signaling inputs ............................... 18
Page 3 of 19
1. Product Description
1.1. Fiber Optic Transmission Link for Incremental Encoders
1.2. Fields of Application
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Figure 1. MR361 Series Fiber Optic Link shown in use with 24 VDC HTL/Push-Pull
Incremental Encoder and Medium Voltage Drive
The MR361 series Fiber Optic Tr ansmission Link System increases the reach of conventional electronicsbased rotary and linear incremental encoders up to distances of 2000 meters via a fiber optic link. This
solution allows clean optical transmission of sensitive encoder signals over long distances, through noisy
electrical areas or when routed in parallel with noisy VFD or High Voltage motor drive lines. The system
works with both optical and magnetic encoders and operates with complete transparency to the motion
control or motor drive system.
The system consists of a fiber optic transmitter (XMTR) and fiber optic receiver (RCVR) module. The
XMTR module multiplexes the user’s encoder’s quadrature output signals of the encoder into a light
signal. A simplex multimode fiber optic link transports the optical signal to the RCVR module which then
demultiplexes the optical signal back into the individual quadrature signals for connection to the encoder
input of the motor drive or motion control system.
• Long distance extension of encoder link through noisy environments
• Interference-free feedback for VFD and Medium/High Voltage drive systems
• Industrial: Oil & gas, mining/extracting, refining, steel mills
• Medical
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1.3. Features
• DIN rail mount XMTR and RVCR modules
• Models for +5 VDC or +10-30 VDC Encoders
• Models for RS422 (TTL) or HTL/Push-Pull line drive circuits
• EMI/RFI immune fiber optic transmission link
• Encoder Link can reach up to 2 km
• Wide System Loss Budget
• Can support 2 encoders if Index not used
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Page 5 of 19
2. Ordering Information
XMTR
RCVR
Encoder Type 1
A+/A-/B+/B-/C+/C-/D+/D-
Encoder Type 2
A+/A-/B+/B-/C+/C-/D+/D-
Encoder Type 3
A+/A-/B+/B-/C+/C-/D+/D-
3. Standard Contents
Encoder Types
Module P/N
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Module P/N
+5 VDC Input Power
RS422 Differential Line Driver Outputs
Up to 4 Channels
+10-30 VDC Input Power
RS422 Differential Line Driver Outputs
Up to 4 Channels
+10-30 VDC Input Power
HTL or Push-Pull Differential Line Driver Outputs
Up to 4 Channels
9770.30.100 9770.30.200
9770.30.140 9770.30.210
9770.30.160 9770.30.220
Note: The XMTR and RCVR modules do not have to be for the same encoder type. Specifying
a different RCVR module allows adapting signals to mismatched equipment/encoder
interfaces. This is not a recommended practice but is a solution for those applications where
the actual Encoder is incompatible with the downstream Encoder Interface on the motor
drive.
Industrial grade ST-to-ST simplex cable assemblies may be specified using the ordering code
MR320-M06Txx where xx is the length in meters.
For a complete transmission system, be sure to order both XMTR and RCVR modules:
• XMTR module as ordered
• RCVR module as ordered
• MR321A 2.5mm fiber optic cleaning kit (one per order)
• Instruction Manual (this document, one hard copy per order)
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4. Installation and Operation
4.1. Mounting Modules on DIN Rail
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Figure 2. Modules mount on standard 35mm DIN rail
Per Figure 4, first clip the fixed (white side) mount into one side of DIN rail. Then snap the
black, spring-loaded end into place.
Figure 3. Close up of DIN rail adapter on module
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4.2. Fiber Optic Connections to the Modules
Figure 4. ST Optical Interface on Module
Figure 5. Module shown with supplied Phoenix Combicon® Wiring Plugs
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The MR361 modules feature a bayonet-style ST-PC optical interface. Be sure that the ST plug
end face is clean before being installed into the ST receptacle. Be sure to align the key on the
plug with the slot on the receptacle before beginning to insert the connector.
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4.3. Electrical Connections to the Module
Connector
Pin
XMTR Module
RCVR Module
J1
1
Ground (Input)
Ground (Input)
2
+Uin Supply (Input, same as Vin))
+Uin Supply (Input)
J2
1
Ground (To Encoder)
Ground (To Drive)
2
+Ub Supply (To Encoder, sam e as +Vb)
+Ub Supply (Optional use, same as +Ub)
3
Channel A+ (From Encoder)
Channel A+ (To Drive)
4
Channel A- (From Encoder)
Channel A- (To Drive)
5
Channel B+ (From Encoder)
Channel B+ (To Drive)
6
Channel B- (From Encoder)
Channel B- (To Drive)
7
Channel C+/Index+ (From Encoder)
Channel C+/Index+ (To Drive, if used )
8
Channel C-/Index- (From Encoder)
Channel C-/Index- (To Drive, if used)
9
Channel D+ (From Encoder, if used)
Channel D+ (To Drive, if used))
10
Channel D- (From Encoder, if used)
Channel D- (To Drive, if used)
11
Cable Shield
Cable Shield
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As shown in Figure 5, both the XMTR and RCVR modules feature modular Phoenix Combicon®
screw-type wiring plugs for making electrical connections to the XMTR/RCVR module and
encoder. Two plugs (J1 and J2) are supplied with each module:
• J1, 2C plug for power connection to module (Phoenix 1840366)
• J2, 11C plug for encoder connections (encoder power and quadrature outputs,
Phoenix 1840450)
The following table shows wiring connections to both XMTR and RCVR modules:
Signal Description
Signal Description
NOTE: In Germany, U is the abbreviation for voltage whereas the USA and others use V
Hence, Uin=Vin (external power input) and Ub=Vb (encoder power input)
IMPORTANT NOTE: Inputs and outputs should be terminated as shown in Figure 6.
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4.4. System Start-Up & Performance Check
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Figure 6. How to terminate XMTR inputs or RCVR outputs
With all optical and electrical connections made to both XMTR and RCVR modules, the green
LED on the front of each module displays status. Figure 7 illustrates the meaning of the
status LED for both XMTR and RCVR modules.
The status LEDs do not indicate if encoder signals are active. The system transmits exactly
what it sees at the inputs of the XMTR module. Best encoder wiring and cabling practices
must be followed to make sure that the encoder signal inputs are clean and properly
grounded. Signal integrity should be verified with an oscilloscope.
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Figure 7. Meaning of Status LED on XMTR and RCVR Modules
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5. Troubleshooting
5.1. Potential Issues & Solutions
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The following are potential issues and recommended solutions when troubleshooting the
MR361 Fiber Optic Encoder Link system. For issues not listed, please contact Micronor Sales.
5.1.1. XMTR Power Green LED not ON when controller powered
• Verify solid electrical connection between wires and screw terminal for both +Uin/+Vin
and GND.
• Verify that external power supply is rated correctly for the encoder being used and
connected
• Contact Micronor Sales for further assistance.
5.1.2. RCVR Link Status LED not ON when controller powered
• Verify solid electrical connection between wires and screw terminal for both +Uin/+Vin
and GND.
• Verify that external power supply is rated correctly for the drive inputs.
• Contact Micronor Sales for further assistance.
5.1.3. RCVR Link Status LED Blinks
• Verify optical link cabling is properly connected and undamaged. A visual fault finder
is an inexpensive tool for verifying continuity.
• Measure RCVR end of link with an optical power meter. Should read at least -24 dBm.
• Verify that the entire fiber optic system does not exceed system loss margin
specifications. Use either an optical power meter or OTDR to trace the link.
• Clean all fiber optic connector surfaces using appropriate cleaning materials.
• Contact Micronor Sales for further assistance.
5.1.4. RCVR Encoder Outputs not working but both LEDs On
• If accessible, verify outputs of Encoder using oscilloscope
• Verify A/B/C/D inputs to XMTR module using oscilloscope
• Verify A/B/C/D outputs of RCVR module using oscilloscope
• Contact Micronor Sales for further assistance.
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5.2. Damaged In Shipment
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In the event of a damaged instrument, write or call your nearest MICRONOR office in the USA or
Europe. A. Please retain the shipping container in case reshipment is required for any reason.
If you receive a damaged instrument you should:
1) Report the damage to your shipper immediately.
2) Inform MICRONOR
3) Save all shipping cartons.
Failure to follow this procedure may affect your claim for compensation.
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6. Warranty Information
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Warranty
MICRONOR warrants this product to be free from defects in material and workmanship for a
period of 1 (one) year from date of shipment. During the warranty period we will, at our option,
either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local MICRONOR representative or contact
MICRONOR headquarters. You will be given prompt assistance and return instructions. Send
the instrument, transportation prepaid, to the indicated service facility. Repairs will be made
and the instrument returned transportation prepaid. Repaired products are warranted for the
balance of the original warranty period, or at least 90 days.
Limitations of Warranty
This warranty does not apply to defects resulting from unauthorized modification or misuse of
any product or part. This warranty also does not apply to Fiber Optic Connector interfaces,
fuses, power supplies or AC line cords. This warranty is in lieu of all other warranties,
expressed or implied, including any implied warranty of merchantability of fitness for a
particular use. MICRONOR. shall not be liable for any indirect, special or consequent
damages.
Contact Information:
For North and South America:
Micronor Inc. Phone +1-805-499-0114
750 Mitchell Road Fax +1-805-499-6585
Newbury Park, CA 91320 USA Email sales@micronor,com
USA URL www.micronor.com
For Europe, Middle East, Asia, Africa:
Micronor AG Phone +41-44-843-4020
Pumpwerkstrasse 32 Phone +41-44-843-4039
CH-8015 Regensdorf Email sales@micronor.ch
SWITZERLAND URL www.micronor.ch
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7. Specifications
XMTR
RCVR
Encoder Type 1
A+/A-/B+/B-/C+/C-/D+/D-
Encoder Type 2
A+/A-/B+/B-/C+/C-/D+/D-
Encoder Type 3
A+/A-/B+/B-/C+/C-/D+/D-
Fiber Optic Interface
ST-PC
Fiber Optic Cabling
OM1, 62.5/125µm Graded Index MMF
Link Distance
Lesser of 6 dB or 2 km
Optical Transmitter
850nm LED
Input Sampling Rate (Per Channel)
2 MHz
Electrical Interface
Phoenix Combicon MC 3.5mm Screw Terminal Plugs
Power Supply Requirements
+10-30V RCVR Module
110 mA + Line Termination Consumption
Encoder Connections
Encoder Types/Part Numbers
Module P/N
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Module P/N
+5 VDC Input Power
RS422 Differential Line Driver Outputs
Up to 4 Channels
+10-30 VDC Input Power
RS422 Differential Line Driver Outputs
Up to 4 Channels
+10-30 VDC Input Power
HTL or Push-Pull Differential Line Driver Outputs
Up to 4 Channels
Optical Specifications Specification
9770.30.100 9770.30.200
9770.30.140 9770.30.210
9770.30.160 9770.30.220
Electrical Specifications Specification
Module Power (J1)
Encoder Connections (J2)
+5V XMTR Module
+5V RCVR Module
+10-30V XMTR Module
Quadrature Outputs
One each supplied with each module:
J1: 2C Plug, Phoenix P/N 1840366
J2: 11C Plug, Phoenix P/N 140450
160 mA + Encoder Power Consumption
160 mA + Line Termination Consumption
110 mA + Encoder Power Consumption
Up to 4 channels (A/B/C/D),
RS422/TTL, HTL/Push-Pull Differential or Unipolar,
Depending on Model
These terminals are directly connected
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Encoder Power
to J1 Module Power Input
Environmental Specifications Specification
Temperature Range
-10° C to +65°C (-14° F to +149° F)
Humidity
0% to 90% RH (non-condensing)
Ingress Protection
IP40
Mounting
35mm DIN Rail
Housing
18 x 111 x 88 mm
(0.70 x 4.37 x 3.47 inches)
Weight
65 g (2.25 oz)
Physical Specifications Specification
Specifications subject to change without notice
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8. Theory of Operation
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A functional block diagram in shown in Error! Reference source not found., showing the Encoder,
XMTR module, optical link, RCVR module and Remote Motor Drive encoder input connections.
The system can accommodate up to 4 channels (A/B/C/D) although most systems use just
A/B or A/B/Index for encoder feedback. In addition, 2 encoders can be served by one link if
only A/A’/B/B’ signals are used.
The Encoder connections to the XMTR module are electrically multiplexed and then
transmitted optically over a simplex fiber optic link. The optical input signal to the RCVR is
then converted back to the electrical domain and demultiplexed back into same 4-channel
encoder signals. The RCVR outputs are then connected to the encoder inputs of the Motor
Drive (or similar motion control system interface).
The end-to-end conversion and optical transmission process is completely transparent to the
Remote Motor Drive. The MR361 system simply extends the reach of the Encoder using fiber
optic transmission techniques.
Figure 8. Theory of Operation of MR361 Fiber Optic Encoder Link System
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9. Applications
9.1. Using unused XMTR inputs for signaling inputs.
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Traditional encoders have only A/B or A/B/Index outputs. That leaves 1 (D) or 2 (C & D)
unused input channels that could be used for routing additional signaling inputs as shown in
the example of Figure 9 .
Figure 9. How to use unused XMTR inputs for signaling inputs
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10. Mechanical Reference Drawing
The XMTR and RCVR modules are the same size and dimensions.
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Dimensions in mm
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