NEMA TS-2 Controller Assemblies: Cabinet and Interface Checks

Introduction

NEMA TS-2 distinguishes Type 1 and Type 2 controller assemblies. Type 1 uses an SDLC link to communicate with cabinet equipment; Type 2 also provides legacy parallel interfaces. Confirm the specified type, standard edition, cabinet wiring and controller documentation. Do not describe all TS-2 interfaces as one 37-pin connector or assume central-system integration is identical for every product.

NEMA TS-2 Standard Scope

TS-2 was published by NEMA in 1992 and updated in 2003. It defines:

• Cabinet size (P-base, Type 1, Type 2, Type 3)
• Approved controller-to-cabinet connector pinout
• Operating voltage (120V AC nominal)
• Temperature range (-30 to +74°C operating)
• Humidity (95% non-condensing)
• Vibration and shock
• Documentation requirements

Standardized interfaces can support interchangeability, but replacement is conditional. Verify the exact controller and cabinet types, standard editions, connectors, I/O mapping, electrical ratings, monitoring, firmware and communications. Obtain documented compatibility and complete acceptance testing before treating a different manufacturer’s unit as a drop-in replacement.

Controller-to-Cabinet Interface Checks

Confirm the rear connector type, pin count, part number and signal assignments from the selected controller’s approved interface drawing before wiring:

• Power: 120V AC and ground
• Logic: 24V DC for controller electronics
• Inputs to confirm: detector channels, preemption channels and priority channels, including supported quantities and electrical interfaces for the selected model.
• Outputs to confirm: vehicle-signal, pedestrian-signal and overlap functions, their independently switched circuits and electrical load limits. Phase count and output count must be checked separately against the selected model and approved signal plan.
• Serial: 2 RS-232 ports for central communication

Controller and cabinet compatibility depends on the actual connector pinout, electrical interfaces, bus and configuration, not only the TS-2 or ATC label. Check approved drawings and complete interface tests before connection.

Cabinet Sizes

NEMA TS-2 defines four cabinet sizes:

• P-base: pole-mount, small intersections
• Type 1: base-mount, 1-2 phase intersections
• Type 2: base-mount, 2-4 phase intersections
• Example base-mounted cabinet: phase capacity depends on the installed controller, I/O configuration and approved design.

The cabinet contains the controller, the conflict monitor, the detector rack, the power supply and the output panel.

Environmental Specs

NEMA TS-2 specifies:

• Temperature: -30 to +74°C operating, -40 to +85°C storage
• Humidity: 95% non-condensing at 38°C
• Vibration: 1g at 5-30 Hz, per NEMA test method
• Shock: 10g peak, 11 ms half-sine

Confirm each applicable TS-2 requirement against the selected model’s documentation. Availability and scope of independent test reports must be verified before they are included in a quotation or acceptance plan.

Featured Products

GAOQIAO supplies TS-2 compatible controllers for North American projects. See the NEMA TS-2 vs ATC comparison and compatibility checklist.

Conclusion

NEMA TS-2 is a North American traffic control equipment standard. For replacement or ATC integration, provide the existing cabinet details and confirm the selected model’s interfaces, conformity documents and required modifications.

Get a Quote

Email: sky-sale@njgq.net
WhatsApp/Phone: +86-18805173545
Tel: +86-25-84471080

Frequently Asked Questions

Can I use a TS-2 controller in an ATC cabinet?

No, the connector pinout is different. A TS-2 controller needs a TS-2 cabinet, and an ATC controller needs an ATC cabinet.

What is the maximum number of phases for a TS-2 cabinet?

Up to 8 phases in a Type 3 cabinet. Larger intersections use multiple cabinets or upgrade to ATC.

Is TS-2 still the right choice for new installations?

Select controller and cabinet standards from the authority’s requirements and the existing installation. For new work, specify the approved editions and required functions rather than assuming one architecture is universally preferred. For replacements, verify electrical, mechanical, software and communications compatibility. Confirm GAOQIAO’s offered configuration and supporting documents in the project quotation.

Relevant GAOQIAO products

These public GAOQIAO catalogue pages are related to the guide. Open them for the representative description, then confirm the latest drawing and configuration before ordering.

• Traffic signal controllersWired and solar controllers with 6, 22, 44 and 56 output options.
• LED traffic signal heads200mm, 300mm and 400mm signal heads with MUTCD, EN12368, GB14886 compliance.
• Signal polesVertical, signal arm and double-arm poles for any intersection geometry.
• Spare parts and accessoriesSpare LED modules, lenses, visors, surge arrestors and anchor bolts.

Related buyer resources

• Traffic Signal Controller Cabinet Guide
• Traffic Light Wiring Diagram Guide
• Traffic Light IP Ratings Guide
• Traffic Signal Head Specification Guide
• Solar Traffic Signal Site Survey
• Contact GAOQIAO

Request a NEMA TS-2 Cabinet Standard quotation