NT631C-ST153-EV3 Omron, NT631C-ST153-EV3 Datasheet - Page 141

• Manufacturer Part Number: NT631C-ST153-EV3
• Description: 10.48-ColrDisplay,TFT,Ivy,Eng
• Manufacturer: Omron

Specifications of NT631C-ST153-EV3

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Connecting to the Host’s RS-422A/485 Port
5-2-7
124
Setting the Terminal Resistance for RS-422A/485
Communications
Note
*1
The terminal screws of the NT631/NT631C are M3.5 specification. When wir-
ing, use crimp terminals for M3.5 use. Tighten terminal screws with a tighten-
ing torque of 0.8 N ⋅ m.
The terminal screws of the RS-422A adaptor (CPM1-CIF11) are M3 specifica-
tion. When wiring, use crimp terminals for M3 use. Tighten terminal screws
with a tightening torque of 0.5 N ⋅ m.
1. Make sure to tighten screws at the connectors after cable connection.
2. Always use crimp terminals for wiring at terminal blocks.
Examples of Applicable Terminals
The serial port B connector of the NT631/NT631C has a terminal resistance
setting terminal (TRM).
In RS-422A/485 communications, a terminal resistor must be set at the device
at the end of the communications cable, but not at any other device.
The NT631/NT631C has a built-in terminal resistor, and whether or not the
terminal resistance is applied is set by shorting or opening the terminal resis-
tance setting terminals (TRM). The terminal resistance is 120 Ω .
When carrying out RS-422A/485 communications using serial port B, short
between terminals at the NT631/NT631C at the end of the RS-422A/485
cable. Leave these terminals open at NT631/NT631C PTs other than the one
at the end of the cable.
When not using RS-422A/485 communications, the terminal resistance set-
ting is ineffective.
Crimp ter-
minals
Crimp terminals of common use for M3 and M3.5
• For M3.5
• For M3
Name
7 mm max.
6.2 mm max.
1.25-N3A
(fork type) *1
Y1.25-3.5L (fork
type) *1
Fork type
Fork type
Model
Japan Solderless
Terminal MFG
Molex Inc.
Short-circuit tool
6.2 mm max.
7 mm max.
Maker
Round type
Round type
RDA
TRM
RDB
SDA
Recommended cable size:
AWG22 to 18
(0.3 to 0.75 mm
Remarks
2
)
Section 5-2