York YK Style H Operation Manual page 200

Table 184: RS-232 pin assignments (DB25 PC
signal set) (older desktops only)
Pin
Received line Signal Detector
Pin 8
(Data Carrier Detect)
Pin 20 Data Terminal Ready
Pin 22 Ring Indicator
The connector on the PC has Male pins, therefore the mating cable needs to terminate in a DB25/F
(Female pin) connector.
Table 185: RS-232 pin assignments (DB9 PC
signal set) (most laptops)
Pin Connection
Received line Signal Detector
Pin 1
(Data Carrier Detect)
Pin 2 Recieved Data
Pin 3 Transmit Data
Pin 4 Data Terminal Ready
Pin 5 Signal Ground
Pin 6 Data Set Ready
Pin 7 Request To Send
Pin 8 Clear To Send
Pin 9 Ring Indicator
The connector on the PC has male pins; therefore, the mating cable needs to terminate DB9/F
(female pin) connector.
Figure 85: Communications block diagram
200
Connection
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center