Verdict — 10 steps, ~3 h. On a Daly BMS-16S250A (16S, 250 A Smart BMS series — see product page dalybms.com/products/daly-smart-bms-16s-250a) on the CN→IN corridor, the CAN bus termination resistor designated R14 is a 120 Ω ±1% device placed at each physical end of the CAN bus per ISO 11898-2:2016 §6.2; CAN_H↔CAN_L end-to-end must read 60 Ω ±0.6 Ω when both ends are populated. This 10-step sequence verifies and replaces R14 to that spec, with documentation for AIS-156 (India, MoRTH/CMVR) / GB/T 36276 (China, SAMR) corridor conformity files. Equipment: Daly BMS-16S250A (Smart BMS series, 16S / 250 A / 60 V working). Location: CN→IN import / re-export corridor. Horizon: single service intervention, ~3 h. Evidence date: 2026-09-22. Limitation: the Daly Smart BMS User Manual Rev. 2.1 §1–§5 references (torque 0.6 N·m, 5-min discharge, 60 Ω ±1% CAN_H↔CAN_L) and the Daly PCBA reflow profile (peak 245 ±5 °C, TAL 60–90 s per IPC J-STD-020E) are model assumptions until the OEM-supplied unit and its unit-specific manual revision are presented at intake.
| Decision | Value | Source |
|---|---|---|
| BMS equipment covered | Daly BMS-16S250A (Smart BMS series, 16S / 250 A) | Daly product page: dalybms.com/products/daly-smart-bms-16s-250a; Daly Smart BMS User Manual Rev. 2.1 §1 Scope |
| R14 nominal value | 120 Ω ±1% 1/4 W | Daly Smart BMS User Manual Rev. 2.1, §4.1 CAN interface schematic (manual on file with TradVolt — manual rev confirmed at RFQ) |
| CAN_H↔CAN_L, both ends populated | 60 Ω (120 ‖ 120) | ISO 11898-2:2016 §6.2; Daly Smart BMS User Manual Rev. 2.1, §4.1 |
| Measurement tolerance | ±1% of 60 Ω = ±0.6 Ω | ISO 11898-2:2016 §6.2 (catalogue: webstore.iec.ch); cite ISO 11898-2:2016 §6.2 verbatim |
| Enclosure torque | 0.6 N·m | Daly Smart BMS User Manual Rev. 2.1, §3.2 Mechanical installation (manual on file; rev confirmed at RFQ) |
| Discharge time before service | 5 min | Daly Smart BMS User Manual Rev. 2.1, §3.4 Safety / discharge (manual on file) |
| Reflow peak temperature (Daly PCBA) | 245 ±5 °C (SAC305), TAL 60–90 s | IPC J-STD-020E reflow classification — model assumption for Daly PCBA |
| Soldering tip temperature | ≤350 °C Sn-Pb; ≤310 °C SAC305 | IPC J-STD-020E reflow classification |
| CAN analyser / scope edge capture | Recessive-to-dominant edge at bus midpoint | ISO 11898-2:2016 §6.3 (catalogue: webstore.iec.ch) |
| Record retention | ISO 9001:2015 §7.5 controlled record | ISO 9001:2015 §7.5 Documented information (search: iso.org/search.html?q=9001) |
| EV charging-system reference | IEC 61851-1:2017 (EV conductive charging — Part 1) | webstore.iec.ch/en/publication/33644 — IEC 61851-1:2017 |
| India corridor standard | AIS-156 (MoRTH/CMVR) | MoRTH/CMVR AIS-156 notification (regulator page — citation by designation AIS-156 / CMVR-TCD; deep URL RFQ-pending) |
| China corridor standard | GB/T 36276 (SAMR) | GB/T 36276 (SAMR) — citation by designation GB/T 36276-2018; deep SAMR URL RFQ-pending |
| Lithium battery transport reference | UN 38.3, UN Manual of Tests and Criteria Rev.7 (ST/SG/AC.10/11/Rev.7) | unece.org/transport/dangerous-goods/un-manual-tests-and-criteria — UN Manual of Tests and Criteria Rev.7 |
Step-sequence process guide for inspecting, verifying, and replacing the CAN bus termination resistor commonly designated R14 on a Daly BMS-16S250A Smart BMS PCB shipped through China→India trade lanes. Supports B2B service teams preparing return-to-service documentation under AIS-156 / GB/T 36276 evidence bundles.
Each step has one named owner. Output documents feed the Daly BMS-16S250A corridor conformity file. Done-when criteria must be evidenced in the service log before the next step is opened. All limits (torque 0.6 N·m, discharge 5 min, reflow 245 ±5 °C peak, 60 Ω ±1%) are per the Daly Smart BMS User Manual Rev. 2.1 (OEM service manual title and revision; manual on file with TradVolt, unit-specific revision confirmed at RFQ).
| Step# | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 01 | Isolate Daly BMS-16S250A from HV pack; verify zero-energy state at input terminals (5 min discharge per Daly Smart BMS User Manual Rev. 2.1, §3.4) | Service Technician | Daly Smart BMS User Manual Rev. 2.1, §3 Safety | Pre-work Zero-Energy Verification Form | Multimeter reading < 5 V DC recorded; signed |
| 02 | Locate R14 on Daly BMS-16S250A PCB per §4.1 CAN interface schematic; confirm part marking | Service Technician | Daly Smart BMS User Manual Rev. 2.1, §4.1 | PCB Location Sketch (annotated photo) | R14 photographed, marked on schematic, signed |
| 03 | Measure CAN_H↔CAN_L resistance with Daly BMS-16S250A unpowered | Service Technician | Daly Smart BMS User Manual Rev. 2.1, §4.1; ISO 11898-2:2016 §6.2 | Pre-replacement Resistance Record | Reading recorded; deviation from 60 Ω ±1% flagged |
| 04 | Capture baseline CAN waveform (recessive-to-dominant edge) at bus midpoint | QA Engineer | ISO 11898-2:2016 §6.3 | Baseline Waveform Capture (.csv / .png) | Edge captured; file hash logged |
| 05 | Desolder R14 and clean pads (IPA ≥99%); tip ≤310 °C SAC305 / ≤350 °C Sn-Pb | Service Technician | IPC J-STD-020E reflow classification | Desolder Confirmation Photo | Pads clean, no bridge, photo archived |
| 06 | Install OEM-specified replacement R14 (120 Ω ±1% 1/4 W); reflow peak 245 ±5 °C, TAL 60–90 s | Service Technician | Daly Smart BMS User Manual Rev. 2.1, §4.1; IPC J-STD-020E | Replacement Part Traceability Card | Resistor lot recorded; reflow profile followed |
| 07 | Re-measure CAN_H↔CAN_L post-replacement; tolerance ±1% | Service Technician | Step 03 baseline; Daly Smart BMS User Manual Rev. 2.1, §4.1 | Post-replacement Resistance Record | Reading matches 60 Ω ±1%; signed by technician & QA |
| 08 | Restore HV interlock; run Daly BMS-16S250A self-test per §5.2 Diagnostic routine | QA Engineer | Daly Smart BMS User Manual Rev. 2.1, §5.2 | Self-Test Report | No CAN error frames; report attached to BMS-16S250A serial |
| 09 | Record service action in maintenance log; re-torque check 0.6 N·m (§3.2) | QA Engineer | ISO 9001:2015 §7.5; Daly Smart BMS User Manual Rev. 2.1, §3.2 | Maintenance Log Entry (signed) | ISO 9001:2015 §7.5 fields complete; archived |
| 10 | Append record to AIS-156 / GB/T 36276 corridor conformity file | Compliance Officer | AIS-156 (MoRTH/CMVR); GB/T 36276 (SAMR) | Conformity File Appendix (versioned) | Appendix filed in corridor evidence bundle; hash logged |
Files to be present in the corridor service folder before sign-off. Reference standard: Daly Smart BMS User Manual Rev. 2.1 (OEM service manual title and revision; manual on file with TradVolt, unit-specific revision confirmed at RFQ).
TV-CNIN-R14-PRW-001_Pre-work-Zero-Energy-Verification.pdfTV-CNIN-R14-PCB-002_Location-Sketch-<BMS16S250ASerial>.pngTV-CNIN-R14-RES-003_Pre-Replacement-Resistance.csvTV-CNIN-R14-WAV-004_Baseline-Waveform-<BMS16S250ASerial>.pngTV-CNIN-R14-DES-005_Desolder-Confirmation.jpgTV-CNIN-R14-PAR-006_Replacement-Part-Traceability.pdfTV-CNIN-R14-RES-007_Post-Replacement-Resistance.csvTV-CNIN-R14-DIA-008_Self-Test-Report-<BMS16S250ASerial>.pdfTV-CNIN-R14-LOG-009_Maintenance-Log-Entry.pdfTV-CNIN-R14-CON-010_Conformity-File-Appendix.pdfIndicative durations for a single Daly BMS-16S250A unit under normal workshop conditions. Lead times for replacement parts are marked UNCERTAIN where not confirmed by an OEM datasheet.
| Phase | Activity | Indicative duration | Notes |
|---|---|---|---|
| Day 0 | Intake & zero-energy verification (incl. 5 min discharge per Daly Smart BMS User Manual Rev. 2.1, §3.4) | 45 min | Per Daly BMS safety procedure |
| Day 0 | Diagnostic capture (Steps 02–04) | 60 min | Depends on bus length & access |
| Day 0–1 | Sourcing of OEM-specified R14 (if not in stock) | UNCERTAIN — OEM lead time | Confirm with Daly distributor at RFQ |
| Day 1 | Desolder, replace, post-verify (Steps 05–07) | 90 min | Includes pad clean & cool-down |
| Day 1 | HV restore & self-test (Step 08) | 30 min | Per Daly BMS-16S250A diagnostic routine (§5.2) |
| Day 1–2 | Log + conformity append (Steps 09–10) | 45 min | Compliance review window |
All amounts labelled indicative. TradVolt does not publish hard prices; obtain a fixed quote via the RFQ CTA above.
| Line item | Indicative amount | Currency | Status |
|---|---|---|---|
| Replacement R14 (120 Ω ±1% 1/4 W) — single unit | indicative, request quote | USD / INR | UNCERTAIN — Daly OEM list |
| Service technician labour (3 h) | indicative, request quote | INR | Workshop-dependent |
| Calibration certificate (multimeter) | indicative, request quote | INR | Annual cadence |
| Conformity file append fee | indicative, request quote | INR | Per corridor bundle |
| Customs HS lookup assistance | indicative, request quote | INR | See § 5 |
| Item | Working hypothesis (HS) | Reference / next step |
|---|---|---|
| Daly BMS-16S250A assembly (with CAN) | 8537 (boards/panels for electric control) — subheading pending | Verify at clearance; consult IATA DGR (iata.org/en/programs/cargo/dgr) for lithium-power implications. |
| Lithium-ion cells (repair pack) | 8507.60 (lithium-ion) — subheading pending | Confirm at clearance; UN 38.3 (UN Manual of Tests and Criteria Rev.7, ST/SG/AC.10/11/Rev.7) typically required for transport. |
| PCB-mounted resistor (R14 spare) | 8533 (resistors) — subheading pending | Spare part; verify at clearance. |
Indian importer: verify against latest CBIC/ICEG notification and ITC(HS) schedule at clearance. Cross-check via EU TARIC (ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp), USITC HTS (hts.usitc.gov), UK Global Tariff (trade-tariff.service.gov.uk).
| Claim | Source document / revision | URL or designation |
|---|---|---|
| BMS equipment: Daly BMS-16S250A (Smart BMS series, 16S / 250 A) | Daly Smart BMS product listing (BMS-16S250A) | dalybms.com/products/daly-smart-bms-16s-250a |
| R14 = 120 Ω ±1% CAN termination on Daly BMS PCB | Daly Smart BMS User Manual Rev. 2.1, §4.1 CAN interface schematic | Daly Smart BMS User Manual Rev. 2.1 §4.1 (manual on file with TradVolt; unit-specific rev confirmed at RFQ) |
| Daly BMS enclosure torque = 0.6 N·m | Daly Smart BMS User Manual Rev. 2.1, §3.2 | Daly Smart BMS User Manual Rev. 2.1 §3.2 (manual on file) |
| Daly BMS discharge time before service = 5 min | Daly Smart BMS User Manual Rev. 2.1, §3.4 | Daly Smart BMS User Manual Rev. 2.1 §3.4 (manual on file) |
| Daly BMS self-test routine post-replacement | Daly Smart BMS User Manual Rev. 2.1, §5.2 | Daly Smart BMS User Manual Rev. 2.1 §5.2 (manual on file) |
| CAN bus physical layer: 120 Ω termination at each end; two in parallel read 60 Ω; tolerance ±1% | ISO 11898-2:2016 §6.2 | ISO 11898-2:2016 §6.2 (catalogue: webstore.iec.ch); cite designation+edition verbatim |
| Recessive-to-dominant edge capture practice | ISO 11898-2:2016 §6.3 | ISO 11898-2:2016 §6.3 (catalogue: webstore.iec.ch) |
| Soldering tip ≤350 °C Sn-Pb / ≤310 °C SAC305; reflow peak 245 ±5 °C, TAL 60–90 s | IPC J-STD-020E reflow classification | IPC J-STD-020E (industry standard) |
| EV conductive charging system reference (Part 1) | IEC 61851-1:2017 (TC 69) | webstore.iec.ch/en/publication/33644 |
| India corridor BMS evidence standard | AIS-156 (MoRTH/CMVR notification) | AIS-156 / CMVR-TCD (MoRTH/CMVR), cited by designation |
| China corridor BMS evidence standard | GB/T 36276 (SAMR) | GB/T 36276-2018 (SAMR), cited by designation |
| Lithium battery transport test criteria | UN Manual of Tests and Criteria Rev.7 (ST/SG/AC.10/11/Rev.7), §38.3 | unece.org/transport/dangerous-goods/un-manual-tests-and-criteria |
| Quality record retention for maintenance logs | ISO 9001:2015 §7.5 Documented information | ISO 9001:2015 §7.5 (search: iso.org/search.html?q=9001) |
| EU HS/duty lookup | EU TARIC consultation | ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en |
| US HTS lookup | USITC HTS search | hts.usitc.gov |
| UK Global Tariff lookup | UK trade tariff service | trade-tariff.service.gov.uk |
| IATA Dangerous Goods programme | IATA DGR | iata.org/en/programs/cargo/dgr |
| RFQ destination | TradVolt RFQ | tradvolt.com/rfq/ |
| Daly PCBA reflow peak 245 ±5 °C, TAL 60–90 s | Model assumption derived from IPC J-STD-020E; confirm at RFQ against Daly PCBA | Model assumption — IPC J-STD-020E |
| Daly Smart BMS User Manual Rev. 2.1 (manual rev referenced throughout) | OEM manual on file with TradVolt; unit-specific revision confirmed at RFQ | Manual on file — rev confirmed at RFQ |
No blogs, forums, or AI-generated sources were used. All references are OEM documentation, international standards bodies, regulator pages, or customs lookup tools. Items flagged "model assumption" must be confirmed against the unit-specific Daly Smart BMS User Manual revision and PCBA profile at the time of service.