Table 21 - Cable Diagram (Rs422/Rs485) - York YHAU-CW Manual

Double effect steam-fired absorption chiller
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SECTION 4 - TECHNICAL DATA

TABLE 21 - CABLE DIAGRAM (RS422/RS485)

PIN CONNECTION
1
2
5
3
9
4
5
6
1
6
7
8
LD20598
9
Shell
88
PIN.
NO.
SIGNAL NAME
RDA
RDB
SDA
ERA
SG
CSB
SDB
CSA
ERB
FG
RS-422/RS-485
DIRECTION
Input
Input
Output
Output
Data Terminal Ready A (+)
Input
Output
Input
Output
Data Terminal Ready B (-)
Frame Ground (Common with SG)
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
MEANING
Receive Data A (+)
Receive Data B (-)
Send Data A (+)
Signal Ground
Send Possible B (-)
Send Data B (-)
Send Possible A (+)
JOHNSON CONTROLS

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