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NX-ECS[][][]

NX-series SSI Input Unit

NX-ECS[][][]

Read position information from encoders with Synchronous Serial Interface (SSI).

General Specification

Item Specification
Enclosure Mounted in a panel
Grounding method Ground to less than 100 Ω
Operating
environment
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) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01,
EU: EN 61131-2, C-Tick or RCM, KC Registration, NK, LR

* Ask your OMRON representative for the most recent applicable standards for each model.

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 3191_sp_2_1 Input signals External inputs: 2 Data input (D+, D-)
External outputs: 2 Clock output (C+,
C-)
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.
20.4 to 28.8 VDC
(24 VDC +20%/-15%)
Current capacity
of I/O power
supply terminals
IOV: 0.3 A max. per terminal
IOG: 0.3 A max. per terminal
NX Unit power
consumption
• Connected to a CPU Unit
1.20 W max.
• Connected to a Commu-
nications Coupler Unit
0.85 W max.
Current
consumption from
I/O power supply
20mA
Maximum transmission
distance *2
Baud Rate Maximum transmission distance
100 kHz 400m
200 kHz 190m
300 kHz 120m
400 kHz 80m
500 kHz 60m
1.0 MHz 25m
1.5 MHz 10m
2.0 MHz 5m
Weight 65g
Circuit layout 3191_sp_2_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3191_sp_2_3
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.

SSI Input Units 2 channel NX-ECS212

Unit name SSI Input Units Model NX-ECS212
Number of channels 2 channels 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 3191_sp_3_1 Input signals External inputs: 2 Data input (D+, D-)
External outputs: 2 Clock output (C+,
C-)
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.
20.4 to 28.8 VDC
(24 VDC +20%/-15%)
Current capacity
of I/O power
supply terminals
IOV: 0.3 A max. per terminal
IOG: 0.3 A max. per terminal
NX Unit power
consumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Commu-
nications Coupler Unit
0.9 W max.
Current
consumption from
I/O power supply
30mA
Maximum transmission
distance *2
Baud Rate Maximum transmission distance
100 kHz 400m
200 kHz 190m
300 kHz 120m
400 kHz 80m
500 kHz 60m
1.0 MHz 25m
1.5 MHz 10m
2.0 MHz 5m
Weight 65g
Circuit layout 3191_sp_3_2
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
3191_sp_3_3
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.

Version Information

Connecting with CPU Units

Refer to the user's manual for the CPU Unit for the CPU Unit to which NX Units can be connected.

NX Unit Corresponding versions *
Model Unit version CPU Unit Sysmac Studio
NX-ECS112 Ver.1.0 Ver.1.13 or later Ver.1.17 or higher
Ver.1.1
Ver.1.2
NX-ECS212 Ver.1.0
Ver.1.1
Ver.1.2

* 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.

Connecting with Coupler Units

NX Unit Corresponding versions *1
Model Unit version EtherCAT
Communications
Coupler Unit
NJ/NX-series
CPU Units or
NY-series
Industrial PCs
Sysmac Studio
NX-ECS112 Ver.1.0 Ver.1.1 or later *2 Ver.1.06 or later *2 Ver.1.07 or higher
Ver.1.1 Ver.1.08 or higher
Ver.1.2 Ver.1.3 or later *3 *4 Ver.1.13 or higher
NX-ECS212 Ver.1.0 Ver.1.1 or later *2 Ver.1.07 or higher
Ver.1.1 Ver.1.08 or higher
Ver.1.2 Ver.1.3 or later *3 *4 Ver.1.13 or higher

NX Unit Corresponding versions *1
Model Unit version EtherNet/IP
Communications
Coupler Unit
Sysmac Studio
NX-ECS112 Ver.1.0 Ver.1.0 or later Ver.1.10 or higher
Ver.1.1
Ver.1.2 Ver.1.13 or higher
NX-ECS212 Ver.1.0 Ver.1.10 or higher
Ver.1.1
Ver.1.2 Ver.1.13 or higher

*1. 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.
*2. You can use the following versions if time stamp refreshing is not used.
      EtherCAT Coupler Unit: Version 1.0
      NJ-series CPU Unit: Version 1.05
*3. To use task period prioritized refreshing, you must use the NX-ECC203.
*4. If you do not use task period prioritized refreshing, you can use EtherCAT Coupler Units which support Position
      Interface Units with unit version 1.1 or earlier.