NT31C-ST143-EV3 Omron, NT31C-ST143-EV3 Datasheet - Page 110

• Manufacturer Part Number: NT31C-ST143-EV3
• Description: 5.7 8-Color Dsp,STN,Ivory,Eng
• Manufacturer: Omron

Specifications of NT31C-ST143-EV3

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

5-1-5
Connecting to the Host’s RS-232C Port
Setting the Terminal Resistance for RS-422A/485
Communications
Note
Recommended connectors, cables and crimp terminals for RS-422A/485
Always use crimp terminals for wiring.
Examples of applicable terminals
The serial port B connector of the NT31/NT31C has a terminal resistance set-
ting 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 NT31/NT31C has a built-in terminal resistor, and whether or not the ter-
minal resistance is applied is set by the wiring at the terminal resistance set-
ting terminals (pins No. 9 and 10 of serial port B). The terminal resistance is
120 Ω . When carrying out RS-422A/485 communications using serial port B,
short between terminals No. 9 and 10 at the NT31/NT31C at the end of the
RS-422A/485 cable. Leave terminals No. 9 and 10 open at NT31/NT31C 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.
In order to set the terminal resistance, wiring work is required at the cable’s
connector: carry out the wiring correctly by referring to Appendix E Making the
Cable.
Connector
Connector
hood
Cable
Crimp
terminals
Name
The terminal screws of the NT-AL001 are M3 specification. When wiring,
use crimp terminals for M3 use. Tighten terminal screws with a tightening
torque of 0.5 N ⋅ m.
When making an RS-422A/485 connecting cable, as far as possible
use the recommended parts indicated in the table below. Some Units
come supplied with one connector and connector hood.
Check the required parts and prepare them in advance.
XM2A-2501
DB-25P F-N
XM2S-2511
DB-C2-J9
TKVVBS4P-03
1.25-N3A
(fork type)
Y1.25-3.5L
(fork type)
6.2 mm max.
Model
Fork type
25-pin type
Made by OMRON
25-pin type
Made by JAE
25-pin type
Made by OMRON
25-pin type
Made by JAE
Tachii Electric Wire
Co., Ltd.
Japan Solderless
Terminal MFG
Molex Inc.
Maker
6.2 mm max.
Delivered with the following Units:
C500-LK203
Delivered with the following Units:
3G2A6-LK201-EV1
3G2A5-LK201-EV1
Delivered with the following Units:
C500-LK203
Delivered with the following Units:
3G2A6-LK201-EV1
3G2A5-LK201-EV1
Recommended cable size:
AWG22 to 18
(0.3 to 0.75 mm
Round type
Remarks
2
)
Section 5-1
93