Operating Manual
7186.5260 / 7186.5261 and 7186.5280 / 7186.5281
Pulse splitters for incremental encoders - with simple or complete potential separation
Available devices:
7186.5260: Pulse splitter with 8 outputs, short circuit proof encoder supply, potential separation
between input and outputs and a temperature range of -20 to + 60 °C / -4° to 140 °F .
7186.5261: Pulse splitter with 4 outputs, short circuit proof encoder supply, potential separation
between input and outputs and a temperature range of -20 to + 60 °C / -4 ° to 140 °F.
7186.5280: Pulse splitter with 8 outputs, short circuit proof encoder supply, complete potential
separation (input, power supply, outputs) and a temperature range of -20 to + 60 °C / -4° to 140 °F.
7186.5281: Pulse splitter with 4 outputs, short circuit proof encoder supply, complete potential
separation (input, power supply, outputs) and a temperature range of -20 to + 60 °C / -4°F to 140 °F.
Product features:
Power supply from 10 up to 30 VDC
1 encoder input for channels A, /A, B, /B, Z, /Z
Input levels selectable between RS422, TTL and HTL
Types with 4 or 8 outputs available (see below)
Selectable output levels (RS422 / TTL / HTL)
Auxiliary 5.5 VDC encoder supply output
Easy cascading of further devices possible (incl. select function)
motrona GmbH, Zeppelinstraße 16, DE - 78244 Gottmadingen, Tel. +49 (0) 7731 9332-0, Fax +49 (0) 7731 9332-30, info@motrona.com, www.motrona.com
Version:
Description:
7186.5280_01a/Jan09/af-hk
Original edition
7186.5280_02a/Jan09/af-hk
Supplements for model 7186.5260
7186.5280_02b_oi/Sep-15/ag
“Safety Instructions”, “Technical Specifications” and design updated
Legal notices:
All contents included in this manual are protected by the terms of use and copyrights of motrona GmbH. Any reproduction,
modification, usage or publication in other electronic and printed media as well as in the internet requires prior written
authorization by motrona GmbH.
Table of Contents
1. Safety Instructions and Responsibility 3
1.1 General Safety Instructions 3
1.2 Use according to the intended purpose 3
1.3 Installation 4
1.4 Cleaning, Maintenance and Service Notes 4
2. Introduction and Block Diagram 5
2.1. Block diagram 7186.5260 and 7186.5261 6
2.2. Block diagram 7186.5280 and 7176.5281 7
3. Electrical Connections and LED Function 8
3.1. Power Supply and LEDs 8
3.2. Auxiliary Encoder Supply 8
3.3. Impulse Inputs 9
3.3.1. Encoders with differential output (valid for output levels TTL/ 5 volts and for HTL / 10 - 30
VDC as well) 9
3.3.2. Encoders with single-ended output, without inverted signals (acceptable only with HTL
level 10 - 30 VDC) 9
3.3.3. Differential signals from an encoder simulation (TTL level with remarkable noise) 9
3.3.4. Differential signals for encoder channels A and B, but single-ended marker pulse from
proximity switch or photocell 10
3.4. The Outputs 11
3.5. Cascading of Several Units and Encoder Select Function 11
4. Technical Specifications 13
5. Dimensions 14
7186_5280_02b_oi_e.doc / Feb-21 Page 2 / 14
1. Safety Instructions and Responsibility
1.1 General Safety Instructions
This operation manual is a significant component of the unit and includes important rules and
hints about the installation, function and usage. Non-observance can result in damage and/or
impairment of the functions to the unit or the machine or even in injury to persons using the
equipment!
Please read the following instructions carefully before operating the device and observe all
safety and warning instructions! Keep the manual for later use.
A pertinent qualification of the respective staff is a fundamental requirement in order to use
these manual. The unit must be installed, connected and put into operation by a qualified
electrician.
Liability exclusion: The manufacturer is not liable for personal injury and/or damage to property
and for consequential damage, due to incorrect handling, installation and operation. Further
claims, due to errors in the operation manual as well as misinterpretations are excluded from
liability.
In addition the manufacturer reserve the right to modify the hardware, software or operation
manual at any time and without prior notice. Therefore, there might be minor differences
between the unit and the descriptions in operation manual.
The raiser respectively positioner is exclusively responsible for the safety of the system and
equipment where the unit will be integrated.
During installation or maintenance all general and also all country- and application-specific
safety rules and standards must be observed.
If the device is used in processes, where a failure or faulty operation could damage the system
or injure persons, appropriate precautions to avoid such consequences must be taken.
1.2 Use according to the intended purpose
The unit is intended exclusively for use in industrial machines, constructions and systems. Nonconforming usage does not correspond to the provisions and lies within the sole responsibility
of the user. The manufacturer is not liable for damages which has arisen through unsuitable
and improper use.
Please note that device may only be installed in proper form and used in a technically perfect
condition - in accordance to the Technical Specifications (see chapter 2). The device is not
suitable for operation in explosion-proof areas or areas which are excluded by the EN 61010-1
standard.
7186_5280_02b_oi_e.doc / Feb-21 Page 3 / 14
1.3 Installation
The device is only allowed to be installed and operated within the permissible temperature
range. Please ensure an adequate ventilation and avoid all direct contact between the device
and hot or aggressive gases and liquids.
Before installation or maintenance, the unit must be disconnected from all voltage-sources.
Further it must be ensured that no danger can arise by touching the disconnected voltagesources.
Devices which are supplied by AC-voltages, must be connected exclusively by switches,
respectively circuit-breakers with the low voltage network. The switch or circuit-breaker must
be placed as near as possible to the device and further indicated as separator.
Incoming as well as outgoing wires and wires for extra low voltages (ELV) must be separated
from dangerous electrical cables (SELV circuits) by using a double resp. increased isolation.
All selected wires and isolations must be conform to the provided voltage- and temperatureranges. Further all country- and application-specific standards, which are relevant for structure,
form and quality of the wires, must be ensured. Indications about the permissible wire crosssections for wiring are described in the Technical Specifications (see chapter 2).
Before first start-up it must be ensured that all connections and wires are firmly seated and
secured in the screw terminals. All (inclusively unused) terminals must be fastened by turning
the relevant screws clockwise up to the stop.
Overvoltages at the connections must be limited to values in accordance to the overvoltage
category II.
For placement, wiring, environmental conditions as well as shielding and earthing/grounding of
the supply lines the general standards of industrial automation industry and the specific
shielding instructions of the manufacturer are valid. Please find all respective hints and rules on
www.motrona.com/download.html --> “[General EMC Rules for Wiring, Screening and
Earthing]”.
1.4 Cleaning, Maintenance and Service Notes
To clean the front of the unit please use only a slightly damp (not wet!), soft cloth. For the rear
no cleaning is necessary. For an unscheduled, individual cleaning of the rear the maintenance
staff or assembler is self-responsible.
During normal operation no maintenance is necessary. In case of unexpected problems, failures
or malfunctions the device must be shipped for back to the manufacturer for checking,
adjustment and reparation (if necessary). Unauthorized opening and repairing can have
negative effects or failures to the protection-measures of the unit.
7186_5280_02b_oi_e.doc / Feb-21 Page 4 / 14
2. Introduction and Block Diagram
7186.5260, 7186.5261, 7186.5280 and 7186.5281 represent a series of incremental encoder
splitters with a most compact, space-saving design and with most versatile technical features.
All models are fully identical except for the number of output channels (4 or 8 channels) and the
system of potential separation.
Models 7186.5260 and 7186.5261 are lower in price but provide only a 2-circuit potential
separation between the input on one side and the outputs with power supply on the other side.
Models 7186.5280 and 7186.5281 provide total galvanic separation between inputs, the power
supply and all outputs one against each other. This feature, in general, can be most
advantageous with impulse distribution among expanded production lines with adverse
conditions of
EMC / grounding / potential shift etc.
The encoder input is switch-selectable for operation with either standard RS422 signals, with
differential TTL or HTL signals or with single-ended HTL encoder signals. All encoder outputs
provide fully isolated push-pull drivers with individual assignment of the output level for each
of the output channels.
Separate cascading ports provide easy cascading of multiple units without loss of regular
encoder outputs. Furthermore, cascaded units allow selection and commutation between
different encoder inputs.
The adjoining block diagrams clearly explain the principle of operation and the potential
conditions between all circuits. For simplification the illustrations show only two of the outputs,
since all other outputs are fully identical.
All units of this series provide an extended range of ambient temperatures for use under
difficult environmental conditions (see chapter 2 “Technical Specifications”).
7186_5280_02b_oi_e.doc / Feb-21 Page 5 / 14
2.1. Block diagram 7186.5260 and 7186.5261
1 2 3 4 5 6 7 8
1
2
3
4
5
6
7
8
A /A B /B Z /Z
1 2 3
-
+
Power
1 2 3 4 5 6 7 8
G
N
D
Stab
+5,5V
8
2
5
3
1
+Vref
4 67
GNDIN
A
/A
B
/B
Z
/Z
+
V
C
C
+
V
C
C
I
N
1
2
3
4
5
6
7
8
GND
0 V
+Lev.
0 V
+Lev.
G
N
D
Select
CASC in
CASC out
GND
A B Z
A
/A
B
/B
Z
/Z
Sel=Lo
Sel=Hi
3
1
5
7
B
Z
A
3
1
5
B
Z
A
7
A
B
Z
A
B
Z
+VCC
GND
+VCC
+VCC = 5,5 V
7186_5280_02b_oi_e.doc / Feb-21 Page 6 / 14
2.2. Block diagram 7186.5280 and 7176.5281
1 2 3 4 5 6 7 8
1
2
3
4
5
6
7
8
A /A B /B Z /Z
1 2 3
-
+
Power
1 2 3 4 5 6 7 8
G
N
D
Stab
+5,5V
8
2
5
3
1
+Vref
4 67
GNDIN
A
/A
B
/B
Z
/Z
+
V
C
C
+
V
C
C
I
N
1
2
3
4
5
6
7
8
GNDO1
VCCO1
0 V
+Lev.
GNDO2
VCCO2
0 V
+Lev.
G
N
D
Select
CASC in
CASC out
GND
A B Z
A
/A
B
/B
Z
/Z
Sel=Lo
Sel=Hi
3
1
5
7
B
Z
A
3
1
5
B
Z
A
7
A
B
Z
A
B
Z
7186_5280_02b_oi_e.doc / Feb-21 Page 7 / 14
-
+
Select
ON
A
B
Z
When the built-in 5.5 volts power should be used to supply the encoder,
position 8 of the DIL switch has to be set to "ON".
This action will suspend the galvanic separation between input and the unit
power supply.
With models 7186.5280 and 7186.5281, also in this case full isolation to all
outputs will be maintained.
3. Electrical Connections and LED Function
3.1. Power Supply and LEDs
The unit provides a 3-position screw terminal strip for supply from a 10 - 30 VDC power unit.
The current consumption is approx. 40 mA (no-load operation). The “Select” input terminal
provides selection of the desired source encoder. Details will be described later.
The upper LED (green) signals that power is applied to the unit.
The lower LEDs (yellow, red, orange) signal the actual logical states of the input channels A, B
and Z. With very low input frequencies it is possible to visually check the input pulses, the
phase displacement A/B and the index pulse function of an encoder.
3.2. Auxiliary Encoder Supply
The input encoder must be connected to the 8-position input terminal strip.
Depending on the application and the encoder type, one of the following options will apply for
the power supply of the encoder:
a) Remote supply via separate source
b) Same power source that also supplies the 7186.5280 unit (10 - 30 VDC)
c) Use of the built-in auxiliary 5.5 volts power supply (terminal 2 of the input connector)
7186_5280_02b_oi_e.doc / Feb-21 Page 8 / 14
3.3. Impulse Inputs
Terminal Connections
DIL Switch Setting
A
/A
B
/B
Z
/Z
0V
1 2 3 4 5 6 7 8
ON
A B Z
Terminal Connections
DIL Switch Setting
A B Z
0V
1 2 3 4 5 6 7 8
ON
Terminal Connections
DIL Switch Setting
A
/A
B
/B
Z
/Z
1 2 3 4 5 6 7 8
ON
The 8-position DIL switch on the front side provides setting of the desired signal formats and
levels. These settings are separately for each of the channels A / B / Z (see block diagram).
For simplification, a short form of the four most common applications is shown below, with the
encoder supply omitted:
3.3.1. Encoders with differential output
(valid for output levels TTL/ 5 volts and for HTL / 10 - 30 VDC as well)
3.3.2. Encoders with single-ended output, without inverted signals
(acceptable only with HTL level 10 - 30 VDC)
3.3.3. Differential signals from an encoder simulation
(TTL level with remarkable noise)
Basically, signals generated by the encoder simulation of a drive can be treated similarly to a
TTL encoder as described in section 3.3.1 (see above). If however there should come up
problems with the quality of the output signals (caused by awkward environmental conditions),
the following mode of connection may remarkably improve the situation. This is a pure
differential operation with fully floating potential, without any reference point.
It is important to leave terminal 1 unconnected.
7186_5280_02b_oi_e.doc / Feb-21 Page 9 / 14
3.3.4. Differential signals for encoder channels A and B,
Terminal Connections
DIL Switch Setting
A
/A
B
/B Z
0V
+24 V
Proximity Switch
\___ TTL ___/
HTL
1 2 3 4 5 6 7 8
ON
The normal encoder input terminal will not accept any single-ended signals
with TTL level, i.e. single-ended signals have to provide HTL level
Nevertheless, in special cases, the cascading inputs of the unit can be used to
apply single-ended TTL signals (CMOS, Low <0.8 V, High >3.5 V). This however
assumes proper EMC conditions and environment as well as short cables on
the input side.
The input terminal strip provides a codification to avoid accidental mix-up with
the other connectors of the unit
but single-ended marker pulse from proximity switch or photocell
Besides the most common standard configurations shown before, the unit allows setting of any
other input configuration (e.g. differential encoder inputs on channels A, /A, B, /B, but singleended index signal on input Z (from a proximity switch, photocell or similar)
The block diagram shows which of the DIL switch positions is responsible for each of the
channels. It is easy to figure out other settings from the examples given in this manual.
7186_5280_02b_oi_e.doc / Feb-21 Page 10 / 14
*) With models 7186.5260 and 7186.5261, terminals 2 (+Lev.) of all outputs are already
connected to the internal +5 V power supply by diodes. This means, where 5 volts
TTL signals are needed, it is not really necessary to apply any remote voltage to the
(+Lev.) terminal.
With models 7186.5280 and 7186.5281 these diodes are missing, therefore a remote
voltage must be applied at any time to make the outputs work.
FK470
3.4. The Outputs
All outputs provide the non-inverted and the inverted signals at any time, even when on the
input side the inverted signals are not available.
The potential situation between the outputs and other circuits is clearly explained by the block
diagrams in chapter 1. On terminal 1 (0V) and terminal 2 (+Lev.) a remote voltage has to be
applied to each output stage, which at the same time also determines the signal level on the
corresponding output*). The permitted range is from 5 to 30 volts and the signal swing will be
about 0.7 volts less than the remote voltage applied. All output lines are permanently shortcircuit-proof and the maximum output current is 30 mA per line.
The terminal assignment can be found in the block diagram and is also printed to the front plate
of the unit. All output terminal strips have the same codification, since it is fully unimportant to
which of the outputs a terminal strip is connected (only the external voltage applied to the
"Lev." input of the mating connector is responsible for the output level).
3.5. Cascading of Several Units and Encoder Select Function
The unit can be cascaded very easily to any number of output channels, without loss of regular
encoder outputs. For cascading, pins 1, 3, 5 and 7 of the cascading output of the first unit must
be connected to the corresponding pins of the cascading input of the follower unit.
An appropriate ribbon cable connection is available under motrona part # FK470
Cascading lines use the same common GND potential as the power supply of the unit. This
however does not mean any disadvantage in terms of galvanic isolation etc. since cascading
units are always mounted alongside and are also supplied from the same power source.
7186_5280_02b_oi_e.doc / Feb-21 Page 11 / 14
Cascaded units allow selection of the active source encoder via the encoder select input on the
Where only one common encoder is used, the select input of the first unit
remains unconnected. The select inputs of all follower units are advantageously
connected to the +pole of the power supply located next to the select input.
3-position power connector (see also block diagram):
LOW (or open): outputs refer to the encoder input of the same unit
HIGH (10 - 30 VDC): outputs refer to the encoder input of the preceding unit
It is possible at any time to switch over from one to the other source encoder during operation.
7186_5280_02b_oi_e.doc / Feb-21 Page 12 / 14
4. Technical Specifications
Power supply:
Input voltage:
Protection circuit:
Ripple:
Consumption:
Connections:
10 … 30 VDC
reverse polarity protection
≤ 10 % at 24 VDC
approx. 40 mA (with an unloaded encoder supply)
screw terminal, 1.5 mm² / AWG 16
Encoder supply:
Description:
Output voltage:
Output current:
Protection:
Connections:
Further possibilities:
switchable auxiliary voltage for 5 V encoders
5.5 VDC
max. 200 mA, galvanically connected with the power supply
short circuit proof
screw terminal, 1.5 mm² / AWG 16
a) encoder supply by using a separate voltage source or
b) use the 10 … 30 V power source that already supplies the unit
Incremental input:
Signal levels (selectable):
Channels:
Frequency:
Connections:
RS422 / TTL (differential voltage > 0.5 V),
HTL (asymmetrical): LOW 0 … 10 V, HIGH 15 … 30 V LOW or
HTL (symmetrical): 10 … 30 V
asymmetrical A, B, Z or symmetrical A, /A, B, /B, Z, /Z
max. 500 kHz at RS422 / TTL resp. max. 200 kHz at HTL
coded screw terminal, 1.5 mm² / AWG 16
Select input:
Signal levels:
Connections:
HIGH >15 V, LOW < 10 V
screw terminal, 1.5 mm² / AWG 16
Cascading in / out:
Signal levels:
Channels:
Signal delay time:
Connections:
5 V (CMOS, Low < 0.8 V, High >3.5 V)
A, B, Z
100 ns per further cascade
optional flat-ribbon cable FK470 / 9-pin female D-SUB connector
Incremental outputs:
Number of outputs:
Output logic:
Signal levels:
Signal delay time:
Output current:
Protection:
Connections:
4 (GV471) resp. 8 (GV470)
push-pull
5 … 30 V
400 ns
max. 30 mA
shot circuit proof
screw terminal, 1.5 mm² / AWG 14
Potential separation:
in / out:
potential separation between input and the outputs
Indicators:
Number of indicators:
Function:
4 LEDs
1 x green for “ready to operate” state and each
1 x yellow, red and orange for logical conditions of inputs A, B, Z
Housing:
Material:
Mounting:
Dimensions:
Protection:
Weight:
plastic
mounting rail (DIN, 35 mm C-Profile)
72 x 144 x 60.5 mm / 2.83 x 4.89 x 2.38 inches (w x h x d)
without connectors and mounting kit
72 x 144 x 90.5 mm / 2.83 x 4.89 x 3.56 inches (w x h x d)
inclusive connectors and mounting kit
IP20
approx. 400 g
Ambient temperature:
Operation:
Storage:
-20 °C … +60 °C / -4 °F … +140 °F (not condensing)
-30 °C … +75 °C / -22 °F … +167 °F (not condensing)
Failure rate:
MTBF in years:
7186.5260: 79.1 a / 7186.5261: 102.9 a / 7186.5280: 64.2 a / 7186.5281: 89.4
a
(long-term usage at 60 °C / 140 °F )
Conformity & standards:
EMC 2004/108/EC:
Guideline 2011/65/EU:
EN 61000-6-2, EN 61000-6-3, EN 61000-6-4
RoHS-conform
7186_5280_02b_oi_e.doc / Feb-21 Page 13 / 14
5. Dimensions
72 mm (2.835'')
1
4
4
m
m
(
5
.
6
6
9
'
'
)
60,5 mm (2.382'')
70,0 mm (2.756'')
8 mm (0.315'')
7186_5280_02b_oi_e.doc / Feb-21 Page 14 / 14
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