ABB DSQC345B & DSQC346C – Dual-Axis Drive Unit AAD | S4 / S4C Robot Controller Platform
Engineering Background
The DSQC345B (3HAB8101-2/07A) and DSQC346C (3HAB8101-7/10A) are ABB’s factory-matched dual-axis servo drive modules designed exclusively for the S4 and S4C controller cabinets. Introduced as part of ABB’s Advanced Axis Drive (AAD) architecture, these units manage closed-loop torque and velocity control for paired robot axes, delivering the microsecond-level response times demanded by high-throughput automotive, foundry, and precision-assembly lines.
Product Positioning
Konmask.com sources these drive units from decommissioned production lines and certified refurbishers, subjecting each unit to full functional verification before listing. Procurement engineers can specify either part number independently or as a matched pair — both are stocked and ship within 2 business days.
Complete Technical Specifications
- Part Numbers: DSQC345B / DSQC346C
- ABB Order Refs: 3HAB8101-2/07A (DSQC345B) | 3HAB8101-7/10A (DSQC346C)
- Function: Dual-Axis Advanced Axis Drive (AAD) — servo torque & velocity control
- Compatible Controllers: ABB S4, S4C, S4C+ cabinet series
- Compatible Robots: IRB 1400, IRB 2400, IRB 4400, IRB 6400 (axis-dependent; verify with robot BOM)
- Drive Architecture: IGBT-based PWM inverter, dual-channel
- Feedback Interface: Resolver / encoder via DSQC interface bus
- Communication Bus: Internal ABB drive bus (proprietary S4 backplane)
- Form Factor: Plug-in module, DIN-rail compatible within S4 cabinet
- Weight: 1,450 g (module only, excluding connectors)
- Country of Origin: Sweden
- Condition: Refurbished / Tested-Good (new-old-stock available on request)
Proven Application Environments
- Automotive Body-in-White: Spot welding and material handling with IRB 6400 cells requiring sustained high-cycle servo performance
- Foundry & Die-Casting: High-temperature ambient operation; drive’s thermal management validated for ≥40 °C cabinet environments
- Precision Assembly: IRB 2400 pick-and-place lines where axis synchronization tolerances are <0.1 mm
- Palletizing & Logistics: IRB 4400 high-payload cycles with continuous duty demand on axes 1–3
- Maintenance & Retrofit: Direct drop-in replacement for aging S4 cabinets; no firmware re-flash required when swapping same revision
Engineering Advantages
- Matched Pair Availability: DSQC345B + DSQC346C sourced as a verified pair — eliminates revision mismatch risk during cabinet rebuild
- Tested Under Load: Each unit bench-tested at rated current before dispatch; test report available on request
- Genuine ABB Hardware: OEM part numbers confirmed; no third-party clones or re-labeled units
- Immediate Availability: In-stock; avoids 8–20 week OEM lead times for new units
- Revision Traceability: Hardware revision stamped on PCB and label — /07A and /10A revisions confirmed compatible with S4C+ firmware ≥ V5.0
System Architecture & Signal Flow
Within the S4/S4C cabinet, the DSQC345B and DSQC346C occupy dedicated drive slots on the axis computer backplane. The main computer (DSQC236 / DSQC239) issues torque references via the internal drive bus; each AAD module independently executes current-loop control at ≥10 kHz, returning actual current and resolver position data. The dual-channel design means a single module governs two robot axes simultaneously, reducing cabinet footprint and inter-module latency compared to single-axis alternatives.
Sourcing & Quality Verification
- All units inspected for physical damage, connector integrity, and PCB condition upon receipt
- Functional test performed with matched ABB axis computer and motor load simulator
- Firmware revision verified and documented
- ESD-safe packaging; shipped with anti-static bag, foam insert, and outer carton
- 12-month warranty against defects in materials and workmanship (DOA replacement within 30 days)
Procurement Process
- Confirm compatibility: Provide your robot serial number or cabinet BOM — our engineers will verify axis slot assignment
- Request quote: Single unit or matched pair pricing available; volume discounts for MRO contracts
- Order & ship: Orders placed before 14:00 CST ship same day; DHL Express / FedEx IP available for urgent AOG situations
- Receive & install: Plug-in replacement; reference ABB Service Manual 3HAC026254-001 for installation torque and connector seating procedure
Technical FAQ
Q: Can DSQC345B and DSQC346C be used interchangeably?
A: No. Each part number is assigned to specific axis slots within the S4 cabinet. DSQC345B typically governs axes 1–2; DSQC346C governs axes 3–4 (robot-model dependent). Always cross-reference your cabinet wiring diagram.
Q: Are these compatible with S4C+ controllers?
A: Yes, provided the cabinet firmware is V5.0 or later. Earlier firmware versions may require a parameter file update — contact us for guidance.
Q: What is the difference between revision /07A and /10A?
A: The /07A (DSQC345B) and /10A (DSQC346C) revisions reflect incremental PCB changes by ABB; both are functionally equivalent within their respective axis slots and are cross-compatible with the same firmware baseline.
Q: Do you provide a test certificate?
A: Yes. A functional test report is included with every unit. Extended burn-in test reports are available for an additional fee.
Q: Can I return a unit if it does not resolve my fault?
A: Yes. We offer a 30-day no-fault return policy for units that do not resolve the diagnosed fault, provided the unit is returned in original condition.
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