Features:
- ABB product ID 48970001-A for exact installed-unit identification
- Exchange reference EXC48970001-A for legacy service handling
- 24 VDC output rated at 25 A for the connected load
ABB DSSS170 48970001-A combines the DSSS170 type designation with product ID 48970001-A as one complete equipment identity.
The 25 A rating defines the downstream load boundary for the installed 24 VDC circuit and must be retained when the unit is renewed.
DSSS170 and DSSS171 belong to different power-system arrangements, so the complete cabinet topology must be identified before selecting a spare.
The ABB DSSS170 48970001-A Diode Unit may remain available through Apter Power for legacy Advant Master maintenance and official-documentation support.
ABB DSSS170 48970001-A Diode Unit Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Source and load connections
- Supply A: The first unregulated 24 VDC source enters the diode-voting path.
- Supply B: The second 24 VDC source provides the redundant feed.
- Isolation: The diode stage prevents one source from back-feeding the other.
- Sensor branch: The selected supply feeds the isolated field-instrument circuit.
Advant power-system placement
- AC 450: DSSS170 serves the isolated sensor-power branch in the controller cabinet.
- AC 410: The unit appears in redundant field-power packages for Advant Controller 410.
- S100 I/O: It supports field-power arrangements associated with S100 I/O equipment.
- Regulator topology: DSSS170 is assigned to the single-regulator arrangement rather than redundant regulator voting.
Supply supervision behavior
- Status LED: The onboard indication reports a fault affecting an unregulated source.
- Upstream check: Both 24 VDC feeds and their protection should be inspected when the indication changes.
- Branch distinction: A source-path alarm does not by itself prove that a downstream instrument has failed.
- Maintenance use: The indication helps isolate a supply-side problem before cabinet hardware is removed.
Documented cabinet uses
- AC field power: The unit participates in redundant alternating-current-derived supply arrangements.
- DC field power: It is also documented in direct-current field-power configurations.
- Isolated sensors: The output branch supplies instrumentation kept separate from the S100 I/O regulator path.
- Legacy maintenance: Complete product and exchange identifiers support cabinet-level service planning.