The KEYMILE COZBU 110 106/1 (hardware revision R1A) is the POSUS power supply/converter unit for the Keymile UMUX 1200/900 multi-service access platform. Confirmed directly via Keymile's official Technical Description manual (which uses this exact part number and label as its reference example for units without software), POSUS is a legacy/earlier-generation power unit — Keymile's own Release Note documentation explicitly lists POSUS as an "obsolete function unit," having been succeeded by the newer POSUM power unit in later UMUX 1200 core configurations. Like POSUM, POSUS converts the subrack's DC input into the regulated voltages required by the system to power traffic and control units. This part is also sold under the ABB brand, reflecting ABB's 2017 acquisition of Keymile. UMUX is a carrier-grade multiplexer platform used by dedicated network operators such as utilities, railways, and airports. Keymile was acquired by ABB in 2017 and the UMUX range was later discontinued; this unit is now sourced mainly as a refurbished or pulled spare part.
Key Features:
- Power supply/converter unit for UMUX 1200 and UMUX 900 subracks
- Functional designation POSUS — legacy/obsolete power unit variant (superseded by POSUM)
- Cross-branded: sold under both Keymile and ABB
- Manufacturer identification label follows Keymile's standard format (MFR ID, S/N, part number, build date)
Technical Specifications:
- Manufacturer Part Number: COZBU 110 106/1
- Hardware Revision: R1A (also seen as R1A/C)
- Manufacturer ID: 214414
- Functional Unit Type: POSUS (obsolete function unit, per Keymile Release Note)
- Manufacturer: KEYMILE AG, Bern-Liebefeld, Switzerland
- Platform Compatibility: UMUX 1200, UMUX 900
- Form Factor: Single mechanical slot, standard UMUX 1200/900 plug-in unit
- Status: Legacy/obsolete — superseded by the POSUM power unit in current UMUX 1200 core configurations
- Note: Exact input/output voltage ranges were not found in a standalone public datasheet — recommend verifying with Keymile/DZS legacy documentation if precise electrical specs are needed.
