JOHNSON CONTROLS
73
SECTION 4 - TECHNICAL DATA
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
4
TABLE 26 -
CABLE DIAGRAM (RS-422/RS485)
PIN CONNECTION
PIN.
NO.
RS-422/RS-485
5
1
9
6
LD20598
SIGNAL NAME
DIRECTION
MEANING
1
RDA
Input
Receive Data A (+)
2
RDB
Input
Receive Data B (-)
3
SDA
Output
Send Data A (+)
4
ERA
Output
Data Terminal Ready A (+)
5
SG
Signal Ground
6
CSB
Input
Send Possible B (-)
7
SDB
Output
Send Data B (-)
8
CSA
Input
Send Possible A (+)
9
ERB
Output
Data Terminal Ready B (-)
Shell
FG
Frame Ground (Common with SG)
2-Wire Type Cable Diagrams
The following is a sample cable diagram for a 2-wire
type connection. It uses a GP4000 series (COM2).
LD20599
LD20599
FIGURE 22 -
2-WIRE 1:1 CONNECTION
WITH USER-CREATED CABLE
