Allen Bradley 800H-2HA7P Push Button Station

The Allen Bradley 800H-2HA7P is a heavy‑duty push button station from the 800H series. Designed for demanding industrial environments, it features two push button operators (maintained or momentary depending on configuration) housed in a Type 4/13 (IP66) enclosure. The 800H series is known for robust construction, large 30 mm operators, and reliable contact blocks. This station is typically used for machine start/stop control, emergency stop (if configured), or other operator interface functions.

Technical Specifications

The 800H-2HA7P consists of a die‑cast aluminum enclosure (RAL 7035 light grey) with two 30 mm push button holes. The enclosure size is approximately 150 mm H x 100 mm W x 80 mm D. It includes two 800H series push button operators, each with a N.O. and N.C. contact block (standard configuration). The operator type can be either momentary or maintained; the -2HA7P suffix typically indicates two green push buttons (momentary) with standard contacts. Contact ratings: 10 A at 120 V AC, 5 A at 240 V AC, 0.5 A at 125 V DC. The enclosure provides Type 4/13 (indoor/outdoor) protection, suitable for hose‑down and corrosion‑resistant applications. Operating temperature -25°C to +70°C. The station includes three 3/4‑inch NPT conduit entries (one on each side and bottom).

Key Features

• Two 30 mm push button operators (momentary, green)

• One N.O. and one N.C. contact per button (total 4 contacts)

• Heavy‑duty die‑cast aluminum enclosure

• Type 4/13 (IP66) – watertight, dust‑tight, corrosion resistant

• Suitable for outdoor and washdown environments

• Large engraved legends (optional, not included)

• Conduit entries with 3/4‑inch NPT threads

• Maintained or momentary configurations available (model dependent)

Construction and Operation

The enclosure features a hinged cover with a quarter‑turn latch and a padlockable hasp to prevent unauthorized access. The push button operators are assembled on the cover, with sealed boots to prevent moisture ingress. Contact blocks snap onto the back of the operator and are easily replaceable without tools. The terminal screws accept up to 12 AWG wire. The station is designed for wall or panel mounting via four mounting holes on the back. The ground terminal inside the enclosure bonds the enclosure to the system ground.

Contact Configurations

The standard 800H-2HA7P includes two contact blocks per button: one normally open (N.O.) and one normally closed (N.C.). The N.C. contact is designed as a force‑guided (safety) type for critical applications (e.g., emergency stop). However, for a start/stop station, the N.C. contact is typically used for the stop button and the N.O. for the start button. The contacts are silver‑cadmium oxide with a low‑energy rating (suitable for PLC inputs). The station can be rewired to other configurations by changing the contact blocks.

Applications

Typical use includes:

• Machine start/stop control panels

• Conveyor control stations

• Pump and motor control

• Emergency stop applications (if configured with red button and twist release)

• Operator stations for outdoor machinery (e.g., cranes, lifts)

Installation

Mount the station on a flat surface using four M4 screws (not supplied). Conduit connections should be made to the bottom or side entries. Use NPT fittings for tight sealing. Wire the contact blocks according to the schematic (normally, the stop button is wired in series with the motor contactor coil, and the start button in parallel with the seal‑in contact). The enclosure must be properly grounded to the safety ground. After wiring, close the cover and secure the latch. Optionally padlock the hasp to prevent tampering.

Standards and Certifications

The 800H-2HA7P is UL Listed (UL 508), CSA Certified (C22.2 No. 14), and CE marked. It meets NEMA Type 4, 4X, 13 and IEC IP66 requirements. It is also compliant with RoHS. The contact blocks are rated for AC‑15 and DC‑13 utilization categories.

Maintenance

Periodically inspect the gasket for damage. Clean the enclosure with mild soap and water. Check that the push button boots are intact. Replace worn contact blocks as needed. The operator mechanism is rated for 1 million mechanical operations.

Conclusion

The Allen Bradley 800H-2HA7P push button station provides a rugged, reliable operator interface for industrial machinery. Its heavy‑duty construction and environmental sealing make it suitable for both indoor and outdoor applications where durability is required.