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Appendices
A - 18
NX-series Position Interface Units User’s Manual (W524)
NX-ECS112
Unit name
SSI Input Units
Model
NX-ECS112
Number of channels
1 channel
Type of external con-
nections
Screwless clamping terminal block
(12 terminals)
I/O refreshing
method
*1
Free-Run refreshing, synchronous I/O refreshing, or task period prioritized refreshing
Indicators
Refer to
7-9.
I/O signals
SSI inputs: 2, Data input (D+, D-)
SSI 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 M
Ω
min. between isolated cir-
cuits (at 100 VDC)
Dielectric strength
510 VAC between isolated circuits
for 1 minute with leakage current of
5 mA max.
I/O power supply
method
Supplied from the NX bus.
20.4 to 28.8 VDC (24 VDC
+20%,
−
15%)
Current capacity of
I/O power supply ter-
minals
IOV: 0.3 A max. per terminal
IOG: 0.3 A max. per terminal
NX Unit power con-
sumption
0.85 W max.
Current consump-
tion from I/O power
supply
20 mA max.
Maximum transmis-
sion distance
*2
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
5 m
Weight
65 g max.
Circuit layout
SSI Clock Output and Data Input
Installation orientation
and restrictions
Installation orientation: 6 possible orientations
Restrictions: There are no restrictions.
120
Ω
No isolation: 5 V GND
No isolation: 5 V
No isolation: 5 V GND
Terminal block
No isolation: 5 V
I/O power
I/O power supply
−
I/O power
I/O power supply
−
Left-side
NX bus
connector
Right-side
NX bus
connector
D+
D-
C+
C-
IOV
IOG
Isola-
tion
cir-
cuit
Inter-
nal
cir-
cuits
Non-
isolated
power
supply
Summary of Contents for NX-EC0112
Page 13: ...11 Manual Structure NX series Position Interface Units User s Manual W524...
Page 34: ...Revision History 32 NX series Position Interface Units User s Manual W524...
Page 36: ...Sections in this Manual 34 NX series Position Interface Units User s Manual W524...
Page 78: ...3 Part Names and Functions 3 8 NX series Position Interface Units User s Manual W524...
Page 108: ...4 Installation and Wiring 4 30 NX series Position Interface Units User s Manual W524 Unit...
Page 114: ...4 Installation and Wiring 4 36 NX series Position Interface Units User s Manual W524...
Page 126: ...5 I O Refreshing Methods 5 12 NX series Position Interface Units User s Manual W524...
Page 340: ...8 Pulse Output Units 8 76 NX series Position Interface Units User s Manual W524...
Page 462: ...Appendices A 74 NX series Position Interface Units User s Manual W524...
Page 463: ...I 1 I NX series Position Interface Units User s Manual W524 Index...
Page 466: ...I 4 NX series Position Interface Units User s Manual W524 Index...