7TB712.91 B & R Automation
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The B & R Automation 7TB712.91 is part of the 0TB Terminal Blocks series and features a cage clamp for copper conductors. This single-row terminal block supports a nominal current of 10 Amps per contact, holds 12 pins, and operates at 300 Volts. It includes two ejection levers and a mechanical removal aid, with a wire size of 1.5 mm² and a pitch of 3.5 mm.
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Product Description:
The 7TB712.91 terminal block is produced by B & R Automation within the 0TB Terminal Blocks series. Designed for cabinet integration, this component provides a detachable interface for field wiring, allowing sensors, actuators, or entire subassemblies to be replaced without disturbing fixed backplane conductors. The detachable connection confines wiring changes to the terminal interface and supports reliable distribution of control signals and auxiliary power in automated production equipment. Its compact form also helps conserve space in densely populated control cabinets.
The block contains 12 pins arranged at a 3.5 mm pitch, providing close contact spacing for high-density assemblies while accommodating ferruled leads. Every contact is rated for 10 A per contact, allowing the block to carry typical 24 V DC solenoid or relay loads without overheating. The insulation system withstands up to 300 V, covering common control and signal levels in machinery panels. A spring-loaded cage clamp securely grips each inserted conductor and avoids the periodic retorquing associated with screw terminals. Two molded ejection levers and a mechanical removal aid allow the plug to disengage from its header without prying tools. This removal mechanism also reduces stress on the header and surrounding wiring during disconnection.
The contacts use copper conductors to maintain electrical continuity and keep resistance at ≤4.2 mΩ, minimizing thermal rise under maximum load. The block accepts stranded or solid wires up to 1.5 mm², making it compatible with common control-circuit wire sizes. Its single-row layout keeps all connection points visible on one plane, while the pair of ejection levers stabilizes the row during disengagement. The compact contact arrangement supports installation where available panel space is limited. Ferruled conductors can be inserted into the clamp terminals without relying on screw pressure, which helps maintain consistent contact force during repeated operating cycles.
