Allen-Bradley 700-HN128 Relay Socket

Allen-Bradley 700-HN128 Relay Socket

Configured for mounting and field wiring of 4-pole plug-in relays, the Allen-Bradley 700-HN128 (700-HN128 Relay Socket) provides a 14-blade electrical interface with screw terminals for relay circuits.

Hardware Specifications

DIN-Rail Mounting and Relay Interface

The 700-HN128 provides a mechanical and electrical socket interface for plug-in relay assemblies. Its 14-blade arrangement supports four-pole relay configurations, while open-style screw terminals provide direct field wiring access.

The socket supports 35 mm DIN rail mounting and panel screw mounting. DIN-rail installation should maintain full mechanical engagement across the mounting profile and avoid lateral loading on the socket body.

The supplied data specifies a 10 A rating per pole and a 300 VAC socket voltage rating. Actual circuit loading must remain within the ratings of both the socket and installed relay.

Frequently Asked Questions

Q: Is the 700-HN128 an active relay or a relay socket?

A: The 700-HN128 is a passive relay socket and does not contain the relay switching element.

Q: What relay configuration does the 700-HN128 support?

A: The socket uses 14 blades and is specified for 4-pole / 4PDT plug-in relay configurations.

Q: Can the socket be installed on a DIN rail?

A: Yes. The supplied specifications identify 35 mm DIN rail mounting and panel screw mounting.

Field Installation Guidelines

Verify the relay model and blade arrangement before inserting the relay into the socket. Confirm that all terminals are correctly identified before field wiring.

Use conductors and protective devices appropriate for the connected circuit voltage and current. Do not exceed the specified 10 A per-pole socket rating or the installed relay rating.

Tighten screw terminals according to the applicable terminal and conductor requirements. Avoid excessive conductor stripping, exposed copper, or mechanical stress on terminal connections.

For DIN-rail installation, seat the socket fully against the rail and verify mechanical retention before wiring. For panel mounting, use suitable mounting hardware and maintain alignment between the socket and relay.

Route relay power wiring separately from low-level analog, communication, and sensitive instrumentation wiring where practical. Maintain adequate separation from high-noise switching conductors.

Where shielded signal wiring is present nearby, terminate shields according to the system grounding design rather than using the relay socket as a grounding point.

Inspect the socket, terminals, and relay blades for contamination, deformation, or loose connections before commissioning. Confirm electrical continuity and correct relay operation after installation.