American Dynamics ad2078 Operating Guide

To connect the AD2078 keyboard to a Matrix Switching
System, refer to the following text and to the Typical System
Connections illustrations at the end of this manual.

An 8-pin, modular RJ-45 port, located on the underside of the
keyboard, is used for all AD2078 connections, both RS-232
and power.  A 7-foot modular cable (JJ0007) and a wall-
mount, dual 8-pin Terminal Block (HP0082, Figure 2) are
provided for connecting this keyboard port to a Matrix
Switching System controller and a power source.  The pin
definitions for both the J1 (Keyboard) and J2 (System) sides of
this Terminal Block are shown in the following table.

Pin

Function

1

Transformer Power In

2

Shield/Ground

3

RS-422 T -

4

RS-232 RCD, RS-422 R +

5

RS-232 XMIT, RS-422 T +

6

RS-422 R -

7

GND (Ground)

8

Transformer Power In

For all Matrix Switching System connections, the AD2078
keyboard port is connected to the J1 jack of the HP0082
Terminal Block using the supplied JJ0007 modular cable.

For AD1650B, AD2050, AD2150, or AD2350 connections
where the cable distance is less than seven feet, both sides (J1
and J2) of the HP0082 Terminal Block are used.

1. Connect the Keyboard side of the HP0082 Terminal Block

to the System side, using the three supplied jumper wires.

a. Connect a jumper wire from pin 7, GND, from the J1

(Keyboard) side to pin 7, GND, on the J2 (System) side.

b. Connect a jumper wire from pin 4, RCD, from the J1

(Keyboard) side to pin 5, XMIT, on the J2 (System) side.

c. Connect a jumper wire from pin 5, XMIT, from the J1

(Keyboard) side to pin 4, RCD, on the J2 (System) side.

2. Connect the controller's JJ0007 cable from the J2 jack of

the HP0082 Terminal Block to an RS-232 port of the
AD1650B, the AD2050 controller (AD1996 CPU), the
AD2150, or the AD2350.

For AD1650B, AD2050, AD2150, or AD2350 connections
where the distance is over seven feet, only the J1 side of the
HP0082 Terminal Block is used.

1. Connect a three-wire, shielded, 18-AWG cable from the J1

side of the HP0082 Terminal Block to the controller's
HP0047 Terminal Block.

a. Connect GND, pin 7, from the J1 side of the HP0082

Terminal Block to GND, pin 7, on the controller HP0047
Terminal Block.

b. Connect RCD, pin 4, from the J1 side of the HP0082 to

XMIT, pin 5, on the controller HP0047 Terminal Block.

c. Connect XMIT, pin 5, from the J1 side of the HP0082 to

RCD, pin 4, on the controller HP0047 Terminal Block.

d. Connect the cable shield to the controller HP0047

Terminal Block only.

2. Connect the controller's JJ0007 cable from the controller

HP0047 Terminal Block to a controller RS-232 port.

For distances up to 1000 ft (330 m) between the keyboard and
system controller, a direct connection using cables and
Terminal Blocks, as described above, may be used.  For
distances over 1000 feet, a link using asynchronous line
drivers, short-haul modems, or dial-up modems is required.

The AD2078 is supplied with a wall transformer (TP8082 or
TP8129 for 120VAC, TP8193 for 230VAC) which must be
connected to the HP0082.  Connect the output leads from the
wall transformer to pins 1 and 8 on the J1 side of the Terminal
Block.  All AD2078 power is supplied from this connection.
The 230 VAC transformer is supplied with a Euro-style IEC
320 type inlet. A suitable, detachable cord should be connected
between the IEC 320 inlet and the power source. The cord
should conform to all national and local use code requirements.

2

Keyb oard

side 

System
side

J1

J2

5

4

6

3

2

7

1

8

5

4

6

3

2

7

1

8

Figure 2 - HP0082 Dual 8-pin Terminal Block

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