NX-ECS[][][] – NX-series SSI Input Unit – Omron Position Interface Units

$ 507.32 – $ 589.82

SKU: N/A

Position Interface: SSI Input Units

Product
name		 Specification Model
Number
of
channels		 Input/
Output
form		 Maximum
data
length		 Encoder
power
supply		 Type of
external
connections
SSI Input
Units
3191_lu_1_1		 1 EIA standard
RS-422-A		 32 bits 24 VDC,
0.3 A/CH		 Screwless push-
in terminal block
(12 terminals)		 NX-ECS112
2 EIA standard
RS-422-A		 32 bits 24 VDC,
0.3 A/CH		 Screwless push-
in terminal block
(12 terminals)		 NX-ECS212

 

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: Meets IEC 61010-2-201.
Noise immunity Conforms to IEC61000-4-4, 2 kV (power supply line)
Overvoltage category Category II: Meets IEC 61010-2-201.
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.

 

 

SSI Input Unit Specifications

SSI Input Unit 1 channel NX-ECS112

Unit name SSI Input Unit 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 Unit 2 channel NX-ECS212

Unit name SSI Input Unit 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.

 

Weight N/A
Dimensions N/A
Model

NX-ECS112, NX-ECS212

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