TC-40G

The Aiphone TC-40G is a 40-call add-on selector unit for TC-M Series internal telephone intercom systems, expanding master station capacity from 10/20 calls to up to 60 total substations by plugging directly into the TC-10M or TC-20M back panel.
It features individual station-select buttons with call-in LEDs that remain lit until answered, supporting selective calling, group calls, and transfer functions between TB-SE handset substations.
Key Specifications
Feature
Specification
Capacity
40 additional TB-SE substations ​
Power
18V DC via PS-18C/E from master station ​
Mounting
Desktop/side placement next to master ​
Indicators
Call-in LEDs per button (red, steady until answered) ​
Connections
Plug-in connector to TC-M back panel ​
Compatibility
TC-10M, TC-20M masters; chainable with TC-20G ​
Dimensions
Approx. 405 × 230 × 97 mm (16" × 9" × 3-13/16") ​
Wiring
Inherits from master station (2-conductor to TB-SE) ​