Omron K3HB - MANUAL 2 Manual page 25

Communications Method
B1 or B3
100- to 125-Ω
Terminator
(1/2 W)
B2 or B4
RS-232C
A B
1
2
RS-232C
3
4
5
6
1-4
Converter Example: RS-232C/RS-485 Converter
K32-23209
Adapter
RS-232C
D-sub, 9-pin
(Straight)
B1 or B3
(B)
(A)
B2 or B4
K3HB
(No. 0)
C D E
1
2
3
4
5
6
• Use terminals B1 through B3 to communicate with the host.
• Wiring is configured 1:1.
• The maximum cable length is 15 m. Use OMRON's Z3RN RS-232C Opti-
cal Interface to extend the wiring path.
• Use shielded, twisted-pair wires of at least AWG28 to AWG16 for all
cables. (Same wire used for RS-485 cable.)
Host computer
RS-232C
25-pin 9-pin
1 ---
2 3
3 2
4 7
5 8
6 6
20 4
7 5
K3SC-10
RS-232C/RS485
Converter
+ -
B1 or B3
(B)
(A)
K3HB
B2 or B4
(No. 1)
B
FG
SD
RD
RS
CS
DR
ER
SG
Shield
Section 1-1
100- to 125-Ω
(B)
Terminator
(A)
(1/2 W)
K3-HB
(No. 31)
SD
RD RS-232C
SG
K3HB
RS-232C
No.
1 SD
2 RD
3 SG