Description
Product Overview
The ABB DSSS-171 3BSE005003R1 is a power voting unit designed for ABB Advant Master S100 I/O hardware. It supports installations using redundant 24 V DC supply paths, helping the system monitor supply availability and fault conditions. Unlike a conventional PLC digital input or output module, the DSSS 171 is part of the I/O rack’s power-distribution and supervision arrangement. Its function is closely tied to the power bus plane and associated voltage regulators.
In the documented arrangement, the DSSS 171 works with the DSBB 188 power bus plane and DSSR 170 voltage regulator units. The assembly handles supply paths identified as 24V_A and 24V_B, along with supervisory and distribution connections. It also provides status signals indicating supply availability and faults. ABB’s S100 I/O hardware documentation describes the DSSS 171 and DSBB 188 together, including supply inputs, protected outputs, fusing, and voltage-monitoring thresholds. These details make the original rack layout and terminal connections important when replacing the unit.
For maintenance and procurement teams, the critical issue is matching the complete part number and power-system configuration. A unit that fits the rack physically may still be unsuitable if the power bus, redundancy scheme, or connection layout differs. Before installing the ABB DSSS-171, compare the existing unit’s markings and connector arrangement, check the applicable S100 I/O manual, and verify the status wiring. When purchasing used or refurbished equipment, request photographs of the actual unit and evidence that its supply-monitoring and voting functions have been tested.
Product Introduction
Unexpected loss of a redundant DC supply can disrupt an entire I/O rack if the power-distribution and supervision arrangement is not configured correctly. The ABB DSSS-171 supports redundant 24 V DC supply monitoring in compatible Advant Master S100 I/O installations.
When sourcing a replacement, verify product ID 3BSE005003R1, the DSBB 188 interface, and the associated DSSR 170 regulator arrangement. Confirm the unit’s condition and test history rather than relying on the model label alone.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | DSSS 171 |
| Product ID | 3BSE005003R1 |
| Product type | Power voting unit |
| System family | Advant Master / S100 I/O |
| Associated power bus | DSBB 188 |
| Associated voltage regulator | DSSR 170 |
| Power system | Redundant 24 V DC supply arrangement |
| Maximum documented input voltage | 35 V DC |
| Supply paths | 24V_A and 24V_B |
| Other power connections | 24VS supervisory circuit and 24VF backup-power connection, depending on rack configuration |
| PBC bus output | 24 V DC |
| Supply-status outputs | LIVE24_A, LIVE24_B, FAIL24_A, FAIL24_B |
| Status-output current limit | 13 mA, as documented for the DSSS 171 and DSBB 188 arrangement |
| Voltage trip thresholds | 19.4 V rising; 18.4 V falling, per S100 I/O documentation |
| Dimensions | Approximately 234 × 99 × 45 mm |
| Net weight | Approximately 0.44 kg |
| Operating temperature | Confirm against the applicable ABB manual |
| Communication protocol | No independent fieldbus interface verified |
| Condition | Supplier confirmation required |
Electrical values above refer to the documented DSSS 171 and DSBB 188 power arrangement. Verify the original rack wiring and manual before installation.
DSSS-171.
Related Products
- ABB DSSR 170 — Voltage regulator used with the I/O power system. It performs the voltage-regulation function, whereas the DSSS 171 handles power voting and supervision.
- ABB DSBB 188 — Power bus plane associated with the DSSS 171 and DSSR 170. Check this component’s connections and fuse arrangement when troubleshooting rack power faults.
- ABB Advant I/O — The I/O hardware family in which the DSSS 171 is used. Confirm the installed rack generation and power configuration before selecting spares.
- ABB DSSR 170 redundancy configuration — A system arrangement using additional voltage-regulator capacity to provide N+1 redundancy. The number and placement of regulators must follow the rack design.
- ABB I/O power-bus assembly — The combined power-distribution and supervision arrangement, including bus connections, fuse protection, and status signals. Troubleshoot the assembly as a system rather than assuming every supply fault originates in the DSSS 171.
Frequently Asked Questions
Q1: What does the ABB DSSS-171 do?
It is a power voting unit used in compatible ABB Advant Master I/O systems. It supports redundant 24 V DC supply arrangements and provides power-status and fault indications.
Q2: Is DSSS-171 the same as DSSS 171 3BSE005003R1?
Yes, these are common formatting variations of the documented DSSS 171 designation. Confirm that the physical unit carries product ID 3BSE005003R1 before ordering.
Q3: Can I replace DSSS 171 with DSSR 170?
No, not as a direct substitution. The DSSS 171 is the power voting unit; the DSSR 170 is a voltage regulator. They perform different functions in the I/O power arrangement.
Q4: Can the DSSS 171 be hot-swapped?
Do not assume it can be replaced live. Although ABB documentation describes live replacement procedures for DSSR 170 regulators in a suitable redundant configuration, that does not establish that the DSSS 171 itself can be hot-swapped. Follow the applicable maintenance manual and plant isolation procedures.
Q5: What voltage thresholds does the unit monitor?
The I/O documentation gives thresholds of 19.4 V for a rising voltage and 18.4 V for a falling voltage in the documented power arrangement. These values should be checked against the applicable manual and measured under the specified test conditions.
Q6: What should I check if a power-failure signal is active?
Check both redundant supply paths, the relevant fuses, the DSBB 188 bus connections, and the DSSR 170 regulators. Then inspect the status wiring and confirm the voltage at the documented measurement points. Follow the equipment’s safety procedures before handling the power assembly.
Q7: What should I request when purchasing a replacement?
Request photographs of the actual unit and its complete product ID, confirmation of the condition, and evidence of functional testing. Verify the DSBB 188 connection arrangement and the site’s redundant-power configuration before installation.
