AMX ViewStat User Manual
Page 22
ViewStat Installation and Wiring
16
ViewStat Communicating Thermostat
Connecting to NetLinx Integrated Controllers via the RS232/422/485 (DB-9) Port
The table below lists the connector pins, signal types, and signal functions for RS-232/RS-422/RS- 485 DB-9
(male) connector on an NetLinx Integrated Controllers (i.e. NI-2000/3000/4000).
FIG. 9 shows the wiring configuration for NetLinx systems (using the DB-9 PROGRAM port).
DB-9 Pinouts
Wiring and Baud Configurations
Pin
Signal
Function
RS-232
RS-422
RS-485
1
RX-
Receive data
X
X (strap to pin 9)
2
RXD
Receive data
X
3
TXD
Transmit data
X
4
TX+
Transmit data
X
X (strap to pin 6)
5
GND
Signal ground
X
X
6
RX+
Receive data
X
X (strap to pin 4)
7
RTS
Request to send
X
8
CTS
Clear to send
X
9
TX-
Transmit data
X
X (strap to pin 1)
The X’s show where to terminate the wires on the DB-9 connector.
FIG. 10
Connecting the ViewStat to an NetLinx Integrated Control System via the RS232/422/485 (DB-9) port
ViewStat
(Communication
terminal)
RS232/422/485
Port