RS-232C Connections
One 8-pin Terminal Box (part number HP0047, see Figure 1-3)
and one 7-foot modular cable (part number JJ0007) is supplied
for each 1996R CPU control port for RS-232 connections.
A compatible RS-232 device (such as the 2096 Alarm
Interface Unit or 1985A Standby Switch) can be connected
directly to a 1996R CPU control port using the supplied
modular cable (JJ0007) if the connection distance between the
1996R and the device is less than seven feet.
Note: American Dynamics keyboards cannot be connected
directly to a control port using the JJ0007 cable. AD
keyboards are supplied with a separate power supply and
a Terminal Box for RS-232 connections.
If the connection distance exceeds seven feet, or if the
connection is to a keyboard, the RS-232 device is connected to
a 1996R control port using the supplied 8-pin Terminal Box
(HP0047, Figure 1-3). The Terminal Box is connected to a
1996R CPU control port with the supplied JJ0007 cable.
The pin definitions for the HP0047 Terminal Box are provided
in the following table.
Terminal
Box
RS-232
Box
Box
Wire
Signal
Signal
Pin #
Color
Code
No Connection
1
Blue
NC
Shield
2
Orange
NC
No Connection
3
Black
NC
Receive Data
4
Red
RCD
Transmit Data
5
Green
XMIT
No Connection
6
Yellow
NC
Ground
7
Brown
GND
No Connection
8
Gray
NC
The maximum cable length between the 1996R Terminal Box
and any external device is 1000 ft. (330 m) using 18-AWG,
shielded cable (Belden 8770 or equivalent). Where the
connection distance between the 1996R CPU and the RS-232
device is over 1000 feet, RS-232 connections require a link
using either asynchronous line drivers over dedicated cables,
short-haul modems over dedicated phone lines, or dial-up
modems over conventional telephone lines.
Terminal Box Wiring:
For proper RS-232 communication, both the pin definitions
and the DTE (Data Terminal Equipment) or DCE (Data
Control Equipment) configuration of each connected RS-232
device must be observed. All American Dynamics equipment,
including the 1996R CPU, are configured as DTE devices.
For DTE-to-DTE communications between an RS-232 device
and a 1996R CPU control port Terminal Box:
• Connect the Transmit (XMIT) pin of the RS-232 device to
the Receive (RCD) pin of the 1996R port Terminal Box.
• Connect the Receive (RCD) pin of the RS-232 device to
the Transmit (XMIT) pin of the 1996R port Terminal Box.
• Connect the Ground (GND) of the RS-232 device to the
Ground (GND) pin of the 1996R port Terminal Box.
RS-232 cable shield connections are made at the connectors or
Terminal Boxes attached to the 1996R controller only.
Consult the installation manual of the RS-232 device for its pin
and signal definitions.
Refer to the Appendix for illustrations of typical RS-232
connections between the 1996R CPU and American Dynamics
keyboards and other RS-232 devices.
1-4
SYSTEM INSTALLATION
PIN 4
PIN 5
PIN 6
PIN 7
PIN 8
PIN 3
PIN 2
PIN 1
Figure 1-3 - 8-Pin Modular Terminal Box HP0047