Bogen SI35A - Manual (Page 16)

TWK351 Wire Converter
The model TWK351 is an adapter used in instances where there is existing 3-wire (2-conductor + shield)
room wiring. The TWK351 cannot be used with the SCR25A module. If 3-wire operation using the
TWK351 wire converter is desired, CA10A call switches must be used (CA11A Call-In switches will not
work in this application).
To install the TWK351, simply insert it between the 9-pin connector labeled TO SWITCHBANK on the
rear panel of the MCP35A and the 9-pin control cable on the first SBA225 panel. Only one TWK351 is
required per system.
1/8 watt
1/4 watt
1/2 watt
1 watt
2 watts
4 watts
Common
Various wattage taps
Line-Matching
Transformer
8-ohm sec.
8-ohm spkr.
PRESS
TO CALL
MODEL
CA10A
BLK
RED
SBA225
OR
SBA325
S
S
A
G
ANNUNCIATOR
LINE
SPEAKER LINES
WIRING DIAGRAM SHOWING
2-WIRE CALL-IN USING THE
TWK351
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