Omron SYSMAC CS Series Operation Manual page 806

Connecting to the RS-232C Port on the CPU Unit
Connection Example to Programmable Terminal (PT)
Direct Connection from RS-232C to RS-232C
• Communications Mode: Host Link (unit number 0 only for Host Link)
• OMRON Cables with Connectors:
XW2Z-200T-1: 2 m
XW2Z-500T-1: 5 m
Recommended Wiring Methods
We recommend the following wiring methods for RS-232C, especially in environment prone to noise.
1. Use shielded twisted-pair cable for communications cables. The following RS-232C cables are
recommended.
UL2464 AWG28×5P IFS-RVV-SB (UL approved)
AWG28×5P IFVV-SB (not UL approved)
UL2464-SB (MA) 5P×28AWG (7/0.127) (UL approved)
CO-MA-VV-SB 5P×28AWG (7/0.127) (not UL approved)
2. Use a twisted-pair cable for each signal line and SG (signal ground) to connect the CPU Unit to a
communications partner. Also, bundle all the SG lines at the Board/Unit and at the other device and
connect them together.
3. Connect the shield line of the communications cable to the hood (FG) of the RS-232C connector at the
Board/Unit. Also, ground the protective earth (GR) terminal of the Power Supply Units on the CPU Rack
and the CS-series Expansion Racks to a resistance of 100 Ω or less. The following example shows
connecting SD-SG, RD-SG, RS-SG, and CS-SG for Serial Communications Mode using a twisted-pair
cable using the peripheral bus.
768
PT
RS-232C
Host Link or NT Link (1:N)
CPU Unit
Pin
Signal
name No.
Shell
FG
FG 1
SD 2
RD 3
RS-232C
interface
RS 4
CS 5
5V 6
DR 7
ER 8
SG 9
D-Sub, 9-pin (male
connector on cable)
NT Link (1:N, N = 1 Unit only)
Model
RS-232C port
PT
Pin Signal
name
No.
Shell
FG
1 –
2 SD
RS-232C
3 RD
interface
4 RS
5 CS
6 5V
7 –
8 –
9 SG
D-Sub, 9-pin (male
connector on cable)
Appendix E
Manufacturer
Fujikura Ltd.
Hitachi Cable, Ltd.