AMX ViewStat - Manual (Page 20)

ViewStat Installation and Wiring
14 ViewStat Communicating Thermostat
Connecting to an Axcess Control System (via AXC-232++, AXB-EM232,
or Axcent3/PRO)
To connect the ViewStat to an Axcess control system via an Axcess Cardframe (cardframe must be equipped
with an AXC-232 232/422/485 Control Card), AXB-EM232 Enhanced Master, or Axcent3(PRO) Controller,
refer to the card-edge pinout information below:
FIG. 8 shows the wiring configuration for Axcess systems:
It is important that the correct pairing is observed. Transmit, Receive, and Mic
need to be on twisted pairs. Splitting pairs (e.g., using a white/green wire with a blue/
white wire for transmit) will result in increased crosstalk, and may result in bus failure
or noise on the intercom.
Axcess System Card Edge Pinouts
Pin Signal Function
1 GND Ground (RS-232)
2 RX Receive data (RS-232)
3 TX Transmit data (RS-232)
4 +12V Power
5 RX - Receive data (RS-422)
6 RX + Receive data (RS-422)
7 TX - Transmit data (RS-422)
8 TX + Transmit data (RS-422)
9 GND Ground
10 CTS Clear-to-send (hardware handshaking)
11 RTS Ready-to-send (hardware handshaking)
12-16 not used
FIG. 8 Connecting the ViewStat to an Axcess Control System
ViewStat
(Communication
terminal) Axcess
Control
System AXC-232(++)
or
AXB-232(++)