Shield Connection Unit (Screwless Clamping Terminal Block, 12
mm W
idth)
Unit name Shield Connection Unit
Model NX-TBX01
External connection ter-
minals
Screwless clamping terminal block (16 terminals)
Number of shield termi-
nals
14 terminals (The following two terminals are functional ground terminals.)
Dimensions 12 (W) × 100 (H) × 71 (D)
Isolation method Isolation between the SHLD functional ground terminal, and internal circuit: No-isolation
Insulation resistance 20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength 510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
NX Unit power con-
sumption
• Connected to a CPU Unit or Communication Control Unit
0.85 W max.
• Connected to a Communications Coupler Unit
0.45 W max.
Current consumption
from I/O power supply
No consumption
Weight 65 g max.
Circuit layout
(Functional ground terminal)
(Functional ground terminal)
Internal circuits
NX bus
connector
(right)
NX bus
connector
(left)
NX Unit power supply +
NX Unit power supply −
I/O power supply +
I/O power supply −
NX Unit power supply +
NX Unit power supply −
I/O power supply +
I/O power supply −
DIN Track contact plate
(Unit back surface)
…
SHLD terminal
SHLD terminal
SHLD terminal
Terminal
block
Installation orientation
and restrictions
Installation orientation:
• Connected to a CPU Unit or Communication Control Unit
Possible in upright installation.
• Connected to a Communications Coupler Unit
Possible in 6 orientations.
Restrictions: No restrictions
Appendices
A-21
NX-series System Units User's Manual (W523)
A-1 Data Sheet
A
A-1-5 Shield Connection Unit
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