Product Description:

The 90.98.200-CE09 is a low-power rectifier module produced by KEB for its Combibox Clutch Brakes series. Classified by the manufacturer as a Combitron rectifier, the device supplies controlled DC to electromagnetic clutch-brake assemblies so they can engage and release on command in automated machinery. By converting alternating input lines into a current-limited direct output, it helps coordinate rapid start-stop cycles within conveyors, packaging equipment, and other motion axes that depend on precise torque transmission.

The module accepts an alternating supply between 180 V and 300 V AC, and the input may deviate by only ±0 %, so upstream power sources must stay inside that narrow band. Internally, a half-wave bridge performs rectification across the wider 80–300 VAC window specified for the circuit. For clutch engagement peaks the controller enables an overexcitation pulse lasting 350 ms, with a tolerance of ±10 %, raising coil current to 2.4 A when the ambient board temperature is held at 45 °C. After that interval it reverts to a continuous limit of 1.2 A to curb heating. The board supports both AC-side and DC-side switching, matching the requirements of the “180–300 VAC input variant” designation and allowing installers to wire the contactor on either side of the bridge.

A lightweight Plastic housing insulates the electronics and complies with the KEB Electromagnetic Technology product family guidelines. When the ambient rises to 75 °C the steady-state load is curtailed to 0.7 A, while the matching overexcitation plateau becomes 1.4 A to keep coil temperature within rating. The board remains operative down to -40 °C, so cold-start reliability is maintained in unheated warehouses, and it will withstand continuous duty up to the series maximum of 75 °C without derating the rectifier itself. Mechanical switching should not exceed 1 /min; this low rate prevents thermal cycling of the clutch pads and ensures the overexcitation capacitor recovers fully between operations.