Johnson Controls York YHAU-C User Manual

Figure 44: Connection Detail for D-sub 9pin
Table 19: Cable Diagram (RS-422/RS-485)
Pin Connection RS-422/RS-485
Pin. No.
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)
93YHAU-C Single Effect Steam-Fired Absorption Chiller

Johnson Controls York YHAU-C Specifications

General

Brand	Johnson Controls
Model	York YHAU-C
Category	Chiller
Language	English