Allen-Bradley 700-HLT1U1 Bulletin 700-HL Terminal Block Relay

Allen-Bradley 700-HLT1U1 Bulletin 700-HL Terminal Block Relay

Configured for control signal interfacing, the Allen-Bradley 700-HLT1U1 (700-HLT1U1 Terminal Block Relay) provides relay isolation between logic circuits and load devices. The unit uses an SPDT contact arrangement, screw clamp terminals, a replaceable relay module, and a built-in LED indicator.

Hardware Specifications

Industrial Control and Relay Interface Characteristics

The 700-HLT1U1 uses an SPDT contact arrangement with one normally open and one normally closed contact. The relay provides a 6 A contact rating at 250 VAC or 30 VDC, while AgSnO2 contact material supports the specified switching interface.

Its 6.2 mm housing width permits high-density installation on 35 mm DIN rail assemblies. Screw clamp terminals provide the field wiring interface, while detachable clamps allow relay replacement without disturbing connected field conductors.

The built-in LED indicates coil status at the terminal block. A retaining clip secures the assembly during installation, and the replaceable relay module separates relay replacement from permanent field wiring.

The supplied data also identifies coil surge protection, although its electrical protection limits are not specified. Therefore, external suppression requirements should follow the installed control circuit design.

Frequently Asked Questions

Q: Can the relay module be replaced without disconnecting the field wiring?
A: Yes. The supplied specifications identify a replaceable relay module and detachable screw clamp terminals.

Q: What contact configuration does the 700-HLT1U1 provide?
A: It provides an SPDT, 1 Form C arrangement with one normally open and one normally closed contact.

Q: Is the relay force-guided?
A: No. The supplied specification explicitly identifies the force-guided contact option as not provided.

Field Installation Guidelines

Install the terminal block relay on a compatible 35 mm DIN rail and verify mechanical engagement before wiring.

Route coil conductors separately from high-energy switching conductors where practical to reduce unwanted electrical coupling.

Terminate conductors using the specified screw clamp terminals and verify conductor seating before energizing the circuit.

Connect the relay contacts according to the required normally open or normally closed switching function.

Confirm that the connected load remains within the stated 6 A contact rating and specified voltage limits.

Maintain protective separation between control wiring and circuits operating at substantially different voltage levels.

For shielded signal wiring, terminate shields according to the cabinet grounding scheme and avoid unintended ground loops.

Verify the LED status indication after applying the coil supply and confirm the corresponding contact state with suitable test equipment.