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.
8-ohm sec.
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