Product Description:

The 0TB704.9 terminal block is manufactured by B&R Automation as part of the 0TB Terminal Blocks series. This component is a plug-in field wiring interface used to connect control signals and low-power supply lines inside machinery. By placing detachable contacts on a fixed pitch, the block allows connected wiring to be removed from a mating header without disturbing permanent panel wiring. This supports clear separation between field devices and cabinet electronics. The detachable format also keeps board-level wiring organized because grouped conductors can remain in one removable connection point.

Its conductor paths are fabricated from Copper, giving low resistive losses and compatibility with common tinned stranded or solid leads. The maximum contact resistance is ≤5 mΩ, so voltage drop remains low even when several blocks are used in the same assembly. Each position carries up to 10 A/contact, which is suitable for sensor feeds, pilot valves, and logic power rails. Insulation spacing supports a working level of 300 V, allowing installation on 240 VAC control networks with additional headroom. A center-to-center pin spacing of 5.08 mm matches standard Eurocard layouts, allowing densely packed terminal rows while maintaining creepage and clearance.

The PCB header has 4 pins, so one block serves four individual circuits in a removable plug. Those pins are arranged in 1 straight row, which simplifies labeling and avoids routing crossovers that are more common with staggered patterns. Wire retention uses a Screw Clamp mechanism; turning the screw presses the conductor against the copper bus bar and supports repeated retermination without special ferrules. The plug mates with devices supplied by B&R Automation, keeping it consistent with other components in the 0TB family. This arrangement also works well in compact control sections where organized terminations are needed in limited space.