Schneider Electric (Barber Colman) AT-602 Subbase

The Schneider Electric (Barber Colman) AT-602 Subbase is a professional-grade solution for commercial and industrial HVAC control systems. This single unit thermostat subbase features a high-performance 1 DP4T switch (Double Pole, 4 Throw), providing extensive flexibility for multi-stage applications. Designed for seamless field installation, the unit accommodates various switching functions such as heating to cooling and day to night control transitions. The rugged one-piece molded beige housing is engineered for durability on the job site, fitting standard flush or surface switch boxes. With coded screw terminals rated for up to two No. 14 gauge wire connections, the AT-602 subbase ensures secure electrical pathways for room thermostats and building automation systems. It is fully compatible with most single electric room thermostats, though technicians should note it is not intended for use with TC-114 or TA-121 models. This thermostat selector switch can also be configured as a two or three-position switch using specific legend plates to limit switch travel.

• Universal Compatibility: Works with a broad range of Schneider Electric and Barber Colman electric room thermostats for easier inventory management.
• Flexible Multi-Position Switching: The DP4T switch configuration allows for 4-position control, adaptable to 3-position or 2-position requirements with available travel-limiting plates.
• Industrial-Grade Termination: Features coded screw terminals that simplify wiring and support heavy-gauge field wiring up to 14 AWG.
• Durable Construction: One-piece molded plastic housing resists environmental wear in mechanical rooms and high-traffic areas.
• Standardized Mounting: Easily installs on standard electrical switch boxes or directly to surfaces for 24V applications.

Is the AT-602 suitable for all Barber Colman thermostats?
The AT-602 subbase is compatible with the majority of single electric room thermostats. However, it specifically cannot be used with TC-114, TA-121, HS-8X01, TP-810X, or TP812X models.

Can I use this subbase for sensor switching?
Technicians should not use these selector switches for sensor circuits. The unit is designed for power-carrying control circuits and should be wired according to Class I or Class II standards as required by local codes.

How do I limit the switch positions?
The DP4T slide switch travel can be modified by installing specific switch legend plates (ordered separately), which effectively convert the mechanism into a DPDT or DP3T function depending on the application needs.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.