Discrete outputs, Rs232 serial communications interface, Table 1-5. computer com port pin outs – Hamilton Sundstrand Company ACT2000 User Manual
Page 24
18
ACT2000 USER GUIDE
Discrete Outputs
The discrete outputs are +24 VDC. They are electrically isolated up to 500
VAC. See Figure 1-12 for a typical discrete output alarm connection.
CONTROLLER DISCRETE INPUT
ACT2000 DISCRETE OUTPUT
Figure 1-12. Typical Discrete Output Alarm Connection
RS232 Serial Communications Interface
Signal levels for the serial communications input and output are per
RS232 standards. See Figure 1-13 for a typical RS232 serial interface
connection. See Table 1-5 for computer COM port pin-outs for RS232.
COM 1
Tx
Rx
RTN
[WHT/ORN/BLU]
Tx
[WHT/ORN/YEL]
Rx
[WHT/ORN/GRN]
RTN
Tranceiver
ACT2000 RS232 INPUT / OUTPUT
COMPUTER
Figure 1-13. Typical RS232 Serial Interface Connection
FUNCTION
Standard 9-Pin
COM Port
Standard 25-Pin
COM Port
Transmit (Tx).
Pin 3
Pin 2
Receive (Rx)
Pin 2
Pin 3
Ground (GND)
Pin 5
Pin 7
Table 1-5. Computer COM Port Pin Outs