User`s manual

Chapter 2 - Specifications
GP-477R/577R Series User's Manual 2-9
SIO
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Recommended Connector: Dsub25pin plug XM2A-2501<made by OMRON Corp.>
Recommended Cover : Dsub25pin cover XM2S-2511<made by OMRON Corp.>
Jack Screws XM2Z-0071<made by OMRON Corp.>
Use rough metric type M2.6x0.45p threads used to secure the cable's set screws.
Recommended Cable:
CO-MA-VV-SB5Px 28AWG <made by HITACHI Cable Ltd.>
To determine your PLC's connection: PLC Connection Manual
When creating your own cable, follow the instructions listed below:
For RS-422
(The following pairs of pin #'s must be connected to each other)
#18 (CSB) <—> #19 (ERB)
#21 (CSA) <—> #22 (ERA)
• When connecting the RS-422 cable and the #9 (TRMX) and #10 (RDA) points, a
termination resistance of 100W added between RDA and RDB.
• When making a cable and using a Memory Link type connection, be sure to create a
4-wire System.
For RS-232C
• Do not use the following pins: 9 (TRMX), 10 (RDA), 11 (SDA), 15 (SDB), 16 (RDB),
18 (CSB), 19 (ERB), 21 (CSA), 22 (ERA).
• Since Pin#14(VCC) is unprotected, be sure to keep the output cur-
rent in the rated range.
• Be sure to connect this unit's SG/GND (Signal Ground) terminal to
the other unit's Signal Ground Terminal.
Note:
!!
!!
!
Important
3. Serial Interface
Reference
Pin Connection Pin # Signal Name Condition
1 FG Frame ground
2 SD Transmit Data (RS-232C)
3 RD Receive Data (RS-232C)
4 RS Request To Send (RS-232C)
5 CS Clear To Send (RS-232C)
6 NC Not Connected
7 SG Signal Ground
8 CD Carrier Detect (RS-232C)
9 TRMX Termination (RS-422)
10 RDA Receive Data A(RS-422)
11 SDA Transmit Data A (RS-422)
12 NC Not Connected
13 NC Not Connected
14 VCC 5V±0.5 output 0.25A
15 SDB Transmit Data B (RS-422)
16 RDB Receive Data B (RS-422)
17 NC Not Connected
18 CSB Clear To Send B (RS-422)
19 ERB Enable To Receive B (RS-422)
20 ER Enable To Receive (RS-232C)
21 CSA Clear To Send A (RS-422)
22 ERA Enable To Receive A (RS-422)
23 RESERVED Reserved For Future Use
24 NC Not Connected
25 RESERVED Reserved For Future Use