Siemens 6SE7090-0XX84-0AD1 SIMOVERT MASTERDRIVES CUMC Control Unit
The CUMC control unit for SIMOVERT MASTERDRIVES Motion Control compact and chassis units.
Overview
Siemens 6SE7090-0XX84-0AD1 is the CUMC control unit used in SIMOVERT MASTERDRIVES Motion Control compact and chassis equipment. The AD1 hardware level is part of the article identity and must remain visible in replacement planning.
Siemens identifies CUPM 6SE7090-0XX84-0AD5 as the Performance 2 successor. The newer control unit uses a faster main processor, DSP architecture and larger memory, so migration requires parameter, option-board and project compatibility checks.
Engineering Data
Functions
The AD1-and-later control hardware supports two encoder evaluation boards at the same time.
With one encoder board, Siemens specifies slot C; the motor-temperature signal is always evaluated by the encoder board in slot C.
External encoders can be used with the documented SBM2 or SBP evaluation options.
The successor CUPM architecture changes processor and memory capability, making controlled migration necessary.
Applications
- Maintenance of Motion Control MASTERDRIVES equipped with the CUMC AD1 execution.
- Multi-encoder configurations using approved encoder evaluation boards.
- Legacy drive systems preparing a documented conversion from CUMC to CUPM.
- Controlled repair work where option boards, parameters and machine safety functions are recorded.
Lifecycle & Service
- Back up the complete parameter set and option-board configuration before removal.
- De-energize both the 24 V control supply and DC link before connecting or disconnecting encoder cables.
- Record the encoder-board slots, motor-temperature path and every external feedback connection.
- After replacement, validate feedback direction, commutation, limits, diagnostics and the machine safety sequence at reduced risk.
FAQ
Q01Can 6SE7090-0XX84-0AD1 use two encoder evaluation boards?+
Yes. Siemens states that CUMC hardware revision AD1 and later can operate two encoder evaluation boards simultaneously.
Q02Which encoder slot matters for motor-temperature evaluation on 6SE7090-0XX84-0AD1?+
Slot C is the defined path. The motor-temperature signal is evaluated by the encoder board installed in slot C.
Q03Is CUPM 6SE7090-0XX84-0AD5 a blind plug-in replacement for this CUMC?+
No. It is the documented Performance 2 successor, but processor, memory, parameters and option-board support must be reviewed for the installed project.
Q04Why must encoder plugs remain disconnected until both supplies are safe?+
Siemens warns that connecting or disconnecting feedback hardware while the 24 V supply or DC link is energized can damage equipment and lead to uncontrolled movement.
Q05What records reduce risk during a CUMC control-unit exchange?+
Retain the parameter archive, firmware and hardware labels, option-board map, encoder assignments, motor data, communication settings and final acceptance results.
