Product Description
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2021 KEB America, Inc.
3 Product Description
3.1 Scope of this Manual
The KEB COMBITRON 91 is a rectification unit designed exclusively for supplying energy
to electromechanical clutches and brakes. The unit employs a rectifier to convert
incoming AC into DC. The units utilize rectifiers configured as either full-wave or half-
wave circuits in order to match the supply voltage to the coil voltage. The units feature a
compact design which is small enough to fit inside most motor terminal boxes. The
rectifiers are rated for a wide temperature range to support use inside the motor terminal
box. The COMBITRON can be switched either on the AC (line) side or the DC (load) side
while internal MOVs offer protection for the switching contacts.
3.2 Rectifier Components
3.3 Model Numbers
COMBITRON model numbers take the following format:
