Two Wire Adapter
Model MCTWA
Installation and Use Manual
Description
The MCTWA is a two-wire adapter card designed for use with Multicom® 2000 systems and Multi-Graphic ® rack
products. The MCTWA eliminates the need for a third annunciator lead for call switches. It has an added feature of
balanced bridge call detection, which virtually eliminates false call-in. Common return wiring eliminates the need for
isolated speaker shields.
When used with Multicom 2000 systems, the MCTWA will allow normal, urgent, and emergency signaling on two
wires.When used with Multi-Graphic products, the Model SCR25A adapter board is also required. (See
Figures
1
a
and
1
b
on back.)
The MCTWA operates from 24V DC, at a maximum of 2.4 watts per adapter. The Bogen RF24A power supply is
recommended and can supply power for up to
1
0 MCTWA boards. (See
Figure 2.
)
The MCTWA stations can also be configured in the four-wire mode. (See
Figure 3.
)
Installation Instructions
Insert the MCTWA onto the Model MCRM relay module. Use the mounting holes provided to secure the MCTWA
to the MCRM.
Specifications
Functions:
Provides common mode call-in signaling on speaker lines, eliminating the need for an
annunciator lead
Terminations:
0.
1
56 centerline connectors
ICs:
1
2 high-performance operation amplifiers
Power Required:
24V DC at 2.4 watts per board
Dimensions:
1
6-3/4" W x
1
-
1
/8" H x 4-5/8" D
© 2005 Bogen Communications, Inc.
All rights reserved.
Specifications subject to change without notice.
54-5940-0
1
B 0503
