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NX-series SSI Input Unit
NX-ECS@@@
CSM_NX-ECS____DS_E_3_5
Read position information from
encoders with Synchronous Serial
Interface (SSI).
• Process SSI encoder input data using the MC Function
Modules of the NJ-series Machine Automation Controller.
• Encoder data can be synchronised with the control cycle
and EtherCAT Distributed Clock.
Features
• SSI clock frequency is supported up to 2 MHz.
• High-speed remote I/O control with communications cycle as fast as 125 μs.*1
• Free-Run refreshing or Synchronous I/O refreshing, Task Period Prioritized refreshing *2, can be selected for refreshing with the NX-series
EtherCAT Coupler.
• When the MC Function Modules of the NJ/NX-series Machine Automation Controller are used, the encoder input can be used for motion control
instructions as an “axis”.
• Choice of SSI Coding Methods (No conversion, binary code, or gray code)
• Input edge time stamps
• Multi turn and single turn SSI encoders are supported.
• Data Refresh Status (Data refreshing can be checked on the host controller.)
• Maximum connecting SSI cable length:400m
*1. When using the NX-EC01@@ together with the NX701-@@@@ and NX-ECC203.
*2. Task Period Prioritized refreshing is available when the NX-ECC203 is used together.
System Configuration
Support Software (Sysmac Studio)
EtherCAT master (NJ/NX-series CPU Unit)
Connection to the peripheral USB port
or built-in EtherNet/IPTM port on an
NJ/NX-series CPU Unit
EtherCAT
communications cable
SSI Input Unit
EtherCAT Coupler Unit
I/O power
supply
SSI encoder
*
* The SSI encoder is supplied with 24-VDC power from the SSI Input Unit.
Sysmac is a trademark or registered trademark of OMRON Corporation in Japan and other countries for OMRON factory automation products.
EtherCAT® is a registered trademark of Beckhoff Automation GmbH for their patented technology. Other company names and product names in this document are the
trademarks or registered trademarks of their respective companies.
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NX-ECS@@@
Ordering Information
International Standards
• The standards are abbreviated as follows: U: UL, U1: UL(Class I Division 2 Products for Hazardous Locations), C: CSA, UC: cULus, UC1: cULus
(Class I Division 2 Products for Hazardous Locations), CU: cUL, N: NK, L: Lloyd, CE: EC Directives, and KC: KC Registration.
• Contact your OMRON representative for further details and applicable conditions for these standards.
Unit type
Product
Name
Specification
Number of
channels
SSI Input
Units
Input/Output
form
Maximum
data length
Encoder power
supply
Type of external
connections
Model
Standards
1
EIA standard
RS-422-A
32 bits
Screwless push-in
DC24V, 0.3A/CH terminal block
(12 terminals)
NX-ECS112
UC1, N, L, CE, KC
2
EIA standard
RS-422-A
32 bits
Screwless push-in
DC24V, 0.3A/CH terminal block
(12 terminals)
NX-ECS212
UC1, N, L, CE, KC
NX Series
Position
Interface Unit
Option
Product Name
Unit/Terminal Block
Coding Pins
Specification
For 10 Units
(Terminal Block: 30 pins, Unit: 30 pins)
Model
Standards
NX-AUX02
---
Model
Standards
Specification
Product Name
No. of terminals
Terminal Block
12
Terminal number
indications
A/B
Ground terminal
mark
None
Terminal current
capacity
10 A
NX-TBA122
---
Accessories
Not included.
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NX-ECS@@@
General Specification
Item
Enclosure
Grounding method
Operating
environment
Specification
Mounted in a panel
Ground to less than 100 Ω
Ambient operating temperature
0 to 55°C
Ambient operating humidity
10% to 95% (with no condensation or icing)
Atmosphere
Must be free from corrosive gases.
Ambient storage temperature
−25 to 70°C (with no condensation or icing)
Altitude
2,000 m max.
Pollution degree
Pollution degree 2 or less: Conforms to JIS B3502 and IEC 61131-2.
Noise immunity
Conforms to IEC61000-4-4, 2 kV (power supply line)
Overvoltage category
Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level
Zone B
Vibration resistance
Conforms to IEC 60068-2-6.
5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of 9.8 m/s2, 100 min each in X,
Y, and Z directions (10 sweeps of 10 min each = 100 min total)
Shock resistance
Conforms to IEC 60068-2-27. 147 m/s2, 3 times each in X, Y, and Z directions
Applicable standards
cULus: Listed UL508 and ANSI/ISA 12.12.01
EC: EN 61131-2 and C-Tick, KC Registration, NK, LR
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NX-ECS@@@
Specification
SSI Input Units 1 channel NX-ECS112
Unit name
SSI Input Units
Model
NX-ECS112
Number of channels
1 channel
Type of external
connections
Screwless push-in terminal block
(12 terminals)
I/O refreshing method
Free-Run refreshing, synchronous I/O refreshing or task period prioritized refreshing *1
Indicators
External inputs: 2 Data input (D+,D−)
External outputs: 2 Clock output (C+, C−)
Input signals
I/O interface
Synchronized serial interface (SSI)
Clock output
EIA standard RS-422-A line driver levels
Data input
EIA standard RS-422-A line receiver levels
Maximum data length
32 bits (The single-turn, multi-turn, and status data length can be set.)
Coding method
No conversion, binary code, or gray code
Baud Rate
100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 1.0 MHz, 1.5 MHz, or 2.0 MHz
Dimensions
12 × 100 × 71 mm (W×H×D)
Isolation method
Digital isolator
Insulation resistance
20 MΩ min. between isolated circuits (at
100 VDC)
Dielectric strength
510 VAC between isolated circuits for 1
minute with leakage current of 5 mA max.
I/O power supply source
Supplied from the NX bus.
Current capacity of I/O IOV: 0.3 A max. per terminal
20.4 to 28.8 VDC (24 VDC +20%/−15%) power supply terminals IOG: 0.3 A max. per terminal
Current consumption
from I/O power supply
NX Unit power consumption 0.85 W
Maximum transmission
distance *2
Weight
20 mA
Baud Rate
Maximum transmission distance
100 kHz
400 m
200 kHz
190 m
300 kHz
120 m
400 kHz
80 m
500 kHz
60 m
1.0 MHz
25 m
1.5 MHz
10 m
2.0 MHz
5m
65 g
SSI Clock Output and Data Input
C+
CNo isolation: 5 V
Isolation
circuit
Internal
circuits
Terminal block
D+
Circuit layout
D-
120 Ω
No isolation: 5 V GND
Nonisolated
power
supply
Left-side
NX bus
connector
Installation orientation
and restrictions
I/O power supply +
I/O power supply +
I/O power supply −
I/O power supply −
Right-side
NX bus
connector
Installation orientation: 6 possible orientations
Restrictions: There are no restrictions.
Terminal connection
diagram
Failure detection
No isolation: 5 V
No isolation: 5 V GND
None
C+
D+
C-
D-
IOV
IOV
IOG
IOG
NC
NC
NC
NC
Protection
Encoder
None
*1. The I/O refreshing method is automatically set according to the connected Communications Coupler Unit and CPU Unit.
Refer to information on the I/O refreshing methods in the W524 manual for the communications cycles for each model.
*2. The maximum transmission distance for an SSI Input Unit depends on the baud rate due to the delay that can result from the responsiveness
of the connected encoder and cable impedance. The maximum transmission distance is only a guideline. Review the specifications for the
cables and encoders in the system and evaluate the operation of the equipment before use.
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NX-ECS@@@
SSI Input Units 2 channel NX-ECS212
Unit name
Number of channels
I/O refreshing method
SSI Input Units
Model
NX-ECS212
Type of external
Screwless push-in terminal block
2 channels
connections
(12 terminals)
Free-Run refreshing, synchronous I/O refreshing or task period prioritized refreshing *1
Indicators
External inputs: 2 Data input (D+, D−)
External outputs: 2 Clock output (C+, C−)
Input signals
I/O interface
Clock output
Data input
Maximum data length
Coding method
Baud Rate
Dimensions
Synchronized serial interface (SSI)
EIA standard RS-422-A line driver levels
EIA standard RS-422-A line receiver levels
32 bits (The single-turn, multi-turn, and status data length can be set.)
No conversion, binary code, or gray code
100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 1.0 MHz, 1.5 MHz, or 2.0 MHz
12 × 100 × 71 mm (W×H×D)
Isolation method
Digital isolator
20 MΩ min. between isolated circuits (at
510 VAC between isolated circuits for 1
Insulation resistance
Dielectric strength
100 VDC)
minute with leakage current of 5 mA max.
Supplied from the NX bus.
Current capacity of I/O IOV: 0.3 A max. per terminal
I/O power supply source
20.4 to 28.8 VDC (24 VDC +20%/−15%) power supply terminals IOG: 0.3 A max. per terminal
Current consumption
NX Unit power consumption 0.9 W
30 mA
from I/O power supply
Baud Rate
Maximum transmission distance
100 kHz
400 m
200 kHz
190 m
300 kHz
120 m
Maximum transmission
400 kHz
80 m
*2
distance
500 kHz
60 m
1.0 MHz
25 m
1.5 MHz
10 m
2.0 MHz
5m
Weight
65 g
SSI Clock Output and Data Input
C1+, C2+
C1-, C2No isolation: 5 V
Terminal block
Isolation
circuit
Internal
circuits
D1+, D2+
Circuit layout
D1-, D2-
120 Ω
No isolation: 5 V GND
Nonisolated
power
supply
Left-side
NX bus
connector
Installation orientation
and restrictions
Terminal connection
diagram
No isolation: 5 V
No isolation: 5 V GND
I/O power supply +
I/O power supply +
I/O power supply −
I/O power supply −
Right-side
NX bus
connector
Installation orientation: 6 possible orientations
Restrictions: There are no restrictions.
Encoder
C1+
D1+
C1-
D1-
IOV
IOV
IOG
IOG
C2+
D2+
C2-
D2-
Encoder
Failure detection
None
Protection
None
*1. The I/O refreshing method is automatically set according to the connected Communications Coupler Unit and CPU Unit.
Refer to information on the I/O refreshing methods in the W524 manual for the communications cycles for each model.
*2. The maximum transmission distance for an SSI Input Unit depends on the baud rate due to the delay that can result from the responsiveness
of the connected encoder and cable impedance. The maximum transmission distance is only a guideline. Review the specifications for the
cables and encoders in the system and evaluate the operation of the equipment before use.
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NX-ECS@@@
Version Information
NX Units
Model
NX-ECS112
NX-ECS212
Corresponding unit versions/versions *
Unit Version
EtherCAT Coupler Units
NX-ECC20@
NJ/NX-series CPU Units
Ver.1.0
Ver.1.1
Ver.1.0
Sysmac Studio
Ver.1.06 or higher
Ver.1.0 or later
Ver.1.05 or later
Ver.1.08 or higher
Ver.1.06 or higher
Ver.1.1
Ver.1.08 or higher
* Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version, support is provided by the
oldest available version after the specified version. Refer to the user’s manuals for the specific Units for the relation between models and
versions.
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NX-ECS@@@
External Interface
SSI Input Unit
NX-ECS112/212
(B)
(C)
(A)
Letter
(A)
(B)
(C)
Item
NX bus connector
Indicators
Specification
This connector is used to connect to another Unit.
The indicators show the current operating status of the Unit.
The terminal block is used to connect to external devices.
The number of terminals depends on the Unit.
Terminal block
Terminal Blocks
(A)
(B)
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
A8
B8
(C)
12 mm wide
16 terminals
Letter
Item
(A)
Terminal number indication
(B)
(C)
Release hole
Terminal hole
Specification
The terminal number is identified by a column (A and B) and a row (1 through 8).
Therefore, terminal numbers are written as a combination of columns and rows, A1 through A8 and
B1 through B8.
The terminal number indication is the same regardless of the number of terminals on the terminal
block, as shown above.
A flat-blade screwdriver is inserted here to attach and remove the wiring.
The wires are inserted into these holes.
Applicable Terminal Blocks for Each Unit Model
Unit model
NX-ECS122
NX-ECS212
Model
NX-TBA122
NX-TBA122
No. of terminals
12
12
Terminal Blocks
Terminal number
indications
A/B
A/B
Ground terminal
mark
None
None
Terminal current
capacity
10 A
10 A
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NX-ECS@@@
Applicable Wires
Using Ferrules
If you use ferrules, attach the twisted wires to them.
Observe the application instructions for your ferrules for the wire stripping length when attaching ferrules.
Always use plated one-pin ferrules. Do not use unplated ferrules or two-pin ferrules.
The applicable ferrules, wires, and crimping tool are given in the following table.
Terminal types
Manufacturer
Terminals other
than ground
terminals
Phoenix
Contact
Ground
terminals
Terminals other
than ground
terminals
Weidmuller
Ferrule model
AI0,34-8
AI0,5-8
AI0,5-10
AI0,75-8
AI0,75-10
AI1,0-8
AI1,0-10
AI1,5-8
AI1,5-10
AI2,5-10
H0.14/12
H0.25/12
H0.34/12
H0.5/14
H0.5/16
H0.75/14
H0.75/16
H1.0/14
H1.0/16
H1.5/14
H1.5/16
Applicable wire
(mm2 (AWG))
0.34 (#22)
0.5 (#20)
Crimping tool
Phoenix Contact (The figure in parentheses is the applicable wire
size.)
CRIMPFOX 6 (0.25 to 6 mm2, AWG 24 to 10)
0.75 (#18)
1.0 (#18)
1.5 (#16)
2.0 *1
0.14 (#26)
0.25 (#24)
0.34 (#22)
0.5 (#20)
Weidmueller (The figure in parentheses is the applicable wire size.)
PZ6 Roto (0.14 to 6 mm2, AWG 26 to 10)
0.75 (#18)
1.0 (#18)
1.5 (#16)
*1. Some AWG 14 wires exceed 2.0 mm2 and cannot be used in the screwless clamping terminal block.
When you use any ferrules other than those in the above table, crimp them to the twisted wires so that the following processed dimensions are
achieved.
8 to 10 mm
1.6 mm max.
(Terminals other than ground terminals)
2.4 mm max.
(Terminals other than ground terminals)
2.7 mm max.
(Ground terminals)
2.0 mm max.
(Ground terminals)
Using Twisted Wires/Solid Wires
If you use the twisted wires or the solid wires, use the following table to determine the correct wire specifications.
Terminals
Classification
Current capacity
Wire type
Twisted wires
Plated
2 A max.
All terminals except
ground terminals
Ground terminals
Greater than
2 A and 4 A or less
Possible
Greater than
4A
Possible
*1
---
Possible
Solid wire
Unplated
Plated
Unplated
Possible
Possible
Possible
Not
Possible
Possible
Possible
*1
Not
Possible
Possible
*2
Not
Possible
Possible
*2
Wire size
Conductor length
(stripping length)
0.08 to 1.5 mm2
AWG28 to 16
8 to 10 mm
2.0 mm2
9 to 10 mm
*1 Secure wires to the screwless clamping terminal block. Refer to the Securing Wires in the USER'S MANUAL for how to secure wires.
*2 With the NX-TB@@@1 Terminal Block, use twisted wires to connect the ground terminal. Do not use a solid wire.
Conductor length (stripping length)
<Additional Information> If more than 2 A will flow on the wires, use plated wires or use ferrules.
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NX-ECS@@@
Dimensions
(Unit: mm)
SSI Input Unit
NX-ECS112/212
14.1
12.0
1.5
100
104.5
1.5
0.55
65.2
71
80.1
Related Manuals
Man. No
W524
Model
NX-EC0@@@
NX-ECS@@@
NX-PG0@@@
Manual
NX-series Position
Interface
Units User’s Manual
Application
Description
Learning how to use NX-series The hardware, setup methods, and
Position Interface
functions of the NX-series Incremental
Units
Encoder Input Units, SSI Input Units, and
Pulse Output Unit are described.
9
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Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses regarding the Products unless Omron’s analysis confirms that the Products
were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate
modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2016.4
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2016 All Right Reserved.
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