Allen-Bradley 700-HA33A1 General Purpose Relay

Allen-Bradley 700-HA33A1 General Purpose Relay

Configured for switching and manual testing of control circuits, the Allen-Bradley 700-HA33A1 (700-HA33A1 General Purpose Relay) provides three changeover contacts through an 11-pin octal socket interface. The relay uses a 120 V AC coil and includes mechanical status indication and manual test functions.

Hardware Specifications

Bulletin 700-HA Relay Interface and Manual Control

The 700-HA33A1 provides three Form C changeover contact sets for control circuit switching. Its 11-pin octal interface separates coil and contact connections through a socket-mounted installation arrangement.

The mechanical flag indicator provides a local visual indication of relay state. The push-to-test button permits manual actuation during circuit verification, while the lockable hold-down lever supports manual contact retention when required by the control circuit.

The specified 120 V AC coil operates at either 50 Hz or 60 Hz. Contact ratings are specified for resistive loads at 277 V AC and 28 V DC, while horsepower ratings define additional motor-load application limits.

Frequently Asked Questions

Q: Does the 700-HA33A1 use a direct terminal block connection?

A: No. The supplied data identifies an 11-pin octal tube base and socket-mounted connection arrangement.

Q: Can the relay contacts be manually actuated during commissioning?

A: Yes. The relay incorporates a push-to-test button and a lockable hold-down lever for manual actuation and circuit testing.

Q: What environmental operating range is specified for this relay?

A: The supplied specification identifies an operating temperature range from -40 deg C to +55 deg C.

Field Installation Guidelines

Install the relay into a compatible 11-pin octal socket before connecting field wiring. Confirm the socket terminal arrangement against the applicable Allen-Bradley wiring documentation before energization.

Verify the coil supply is 120 V AC at the intended operating frequency before applying power. Keep coil wiring physically separated from low-level analog or instrumentation signal wiring where practical.

Route switched contact conductors according to the voltage and current requirements of the connected circuit. Use conductors, terminals, and protective devices appropriate for the connected load.

For control panels containing low-level signals, maintain appropriate separation between relay wiring and sensitive signal cables. Avoid routing relay contact conductors parallel to instrumentation wiring over long distances.

Ensure the relay socket is mechanically secured to the DIN rail or panel mounting surface. Inspect the relay body, socket contacts, and terminal connections before commissioning.

Use the mechanical flag indicator and push-to-test function during functional verification where permitted by the control circuit design. Do not use the manual hold-down mechanism in a manner that defeats required control or safety interlocks.