Power Bus Module Selection Guide
The “thin‑type” module itself stands 118 mm tall, with a thickness of 12.5 mm; its mounting height is 119 mm (with the mounting rail at 7.5 mm high). The overall width is 108 mm (with an eccentricity of 2 mm). The housing is made of polyamide PA6.6, rated UL94‑V2 for flame retardancy, and can withstand a fire exposure of 85°C for 30 seconds.
2025-06-06
The “thin‑type” module itself stands 118 mm tall, with a thickness of 12.5 mm; its installation height is 119 mm (with the mounting rail at 7.5 mm high). The overall width is 108 mm (with an eccentricity of 2 mm). The housing is made of polyamide PA6.6, rated UL94‑V2 for flame retardancy, and can withstand a fire exposure of 85°C for 30 seconds.
The module’s top‑side terminals are rated for 300 V AC/DC, with a current rating of 20 A, a pitch of 5 mm, and screw‑type connections suitable for flexible conductors ranging from 0.2 to 2.5 mm². The screws are M3 slotted type, with a tightening torque of 0.5–0.6 Nm, and the module supports cold‑plug insertion. For detailed specifications, please refer to the individual model descriptions.
Bus-Powered Terminal Description
The module’s bus‑powered terminal has a rated voltage of 150 V, a rated current of 8 A, a pitch of 3.81 mm, and accepts flexible wires with cross‑sections ranging from 0.2 to 1.5 mm². The plug uses M2 slotted screws with a tightening torque of 0.2 Nm.
Bus-powered wiring method one Power is supplied via the upper power terminals of the first module in each group, while the remaining modules are connected in series through their lower bus terminals. This configuration eliminates the need for auxiliary bus‑terminal side‑mount connectors.
Bus-powered wiring method two , connect the power supply using the wiring from the plug-in connectors on both sides of the bus terminal block; the module is powered via the bottom‑side bus terminal.
The busbar terminals are mounted directly and closely side by side on a 35 mm-wide DIN rail, with their upper ends connected to the bottom mating connectors of modules measuring 12.5–17.5 mm in width. It is recommended that each group of terminals comprise no more than 16 units. If the second power-supply configuration is used, male and female busbar terminal plugs must be installed at both ends of the terminal strip to facilitate wiring or serve as termination mounting points.
Module and bus‑powered terminal installation method: First, secure the bus terminal’s retaining tabs onto the mounting rail. When installing the module, align the rounded locating slot at the lower side of the module with the corresponding key on the bus terminal; insert the side where the arc’s center lies first into the rail, ensuring that the module’s edge engages with the rail’s groove. In the 12.5–17.5 mm thickness direction, center the terminal’s retaining tabs within the corresponding module recess. Then, using the rail’s edge as an axis, rotate the module to press it firmly into place, achieving a tight, secure connection between the module and the bus‑powered terminal. If male and female connector leads are used, the overall module width increases to 19.9 mm: 8.5 mm (male connector side) + 18 – 6.6 mm (11.4 mm female connector side). When no female connector leads are employed, only the female connector side features a bus terminal that protrudes 6.6 mm from the module’s face, while the opposite side’s bus terminal is flush with the module’s surface. For power supply via bus terminals, please contact our sales team.
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