Roche Cobas e411 (Elecsys) Bi-Directional LIS Interfacing Guide
Complete engineering specification, HL7/ASTM protocols, pinouts, and parameter mapping for Roche Cobas e411 (Elecsys) on AILS Cloud LIMS.
1. Roche Cobas e411 (Elecsys) Interfacing Overview & Diagnostic Workflow
The Roche Cobas e411 (Elecsys) is an advanced diagnostic system utilizing real-time fluorescence thermocycling technology for hormones, tumor markers, cardiac biomarkers, infectious serology, and molecular pathogen detection. Integrating the Roche Cobas e411 (Elecsys) with AILS Cloud LIMS standardizes cut-off index (COI) calculations, calibrator curve tracking, and electronic batch signing.
AILS exports 96-well or 384-well plate setup layouts to the Roche Cobas e411 (Elecsys), linking sample accession IDs with internal positive/negative amplification controls.
Real-time cycle threshold (Ct) values and baseline-subtracted fluorescence metrics are ingested directly, automatically classifying qualitative pathogen detection (Detected / Not Detected / Indeterminate).
2. Roche Cobas e411 (Elecsys) RS-232 Serial Port & Pinout Configuration
DB9 Female Serial Cable (COM4). Baud: 19200 bps, 8 Data Bits, Parity None, 1 Stop Bit.
[Instrument DB9] [AILS Gateway PC] Pin 2 (TxD / Data Out) ---------> Pin 2 (RxD / Data In) Pin 3 (RxD / Data In) <--------- Pin 3 (TxD / Data Out) Pin 5 (GND / Signal) <========> Pin 5 (GND / Signal) Pin 7 (RTS) & Pin 8 (CTS) [Loopback or None] Baud: 19200 bps | Data Bits: 8 | Parity: None | Stop: 1
3. Roche Cobas e411 (Elecsys) ASTM E1394 Record Frame
Below is a validated communication frame transmitted between the Roche Cobas e411 (Elecsys) and AILS LIS middleware:
<STX>1H|\^&|||Cobas e411|||||||P|1394-97|20260815135000<CR><ETX>4A<CR><LF> <STX>2P|1||||Nelson^Laura|||F<CR><ETX>3B<CR><LF> <STX>3O|1|ACC2026081514||^^^THYROID|||||||A<CR><ETX>4C<CR><LF> <STX>4R|1|^^^TSH|2.45|uIU/mL|0.27-4.20|N||F<CR><ETX>1E<CR><LF> <STX>5R|2|^^^FT4|1.32|ng/dL|0.93-1.70|N||F<CR><ETX>21<CR><LF> <STX>6R|3|^^^FT3|3.15|pg/mL|2.00-4.40|N||F<CR><ETX>23<CR><LF> <STX>7L|1|N<CR><ETX>0A<CR><LF>
4. Roche Cobas e411 (Elecsys) Clinical Parameter LOINC & Reference Range Dictionary
| Instrument Code | LOINC Code | Clinical Parameter Name | Standard Units | Default Reference Range |
|---|---|---|---|---|
| TSH | 3016-3 | Thyroid Stimulating Hormone | uIU/mL | 0.27 - 4.20 |
| FT4 | 3024-7 | Free Thyroxine (FT4) | ng/dL | 0.93 - 1.70 |
| FT3 | 3051-0 | Free Triiodothyronine (FT3) | pg/mL | 2.00 - 4.40 |
5. Roche Biomedical Engineering Field Notes & Gotchas
In Cobas e411 system settings, configure Host Baud Rate to 19200 bps.
Ensure AILS Serial Daemon is assigned COM4 (or corresponding FTDI virtual COM port).
Check calibration curve lot numbers before dispatching test batches.
Frequently Asked Questions: Roche Cobas e411 (Elecsys) LIS Interfacing
Common biomedical engineering questions regarding connection, worklist setup, and data capture with AILS Cloud LIMS.
Q: What protocol does Roche Cobas e411 use for LIS interfacing?
Roche Cobas e411 uses ASTM E1381/E1394 standard protocol over RS-232 serial port at 19200 baud.
Q: What serial cable is required for Cobas e411?
A standard DB9 Female Null Modem serial cable (Pins 2-3, 3-2, 5-5) connected to the analyzer host port.
Q: Can Cobas e411 download worklists automatically from LIS?
Yes. In bi-directional ASTM mode, e411 queries sample barcodes and downloads assigned immunoassay profiles.
Q: How are qualitative immunoassay results (e.g. Hepatitis/HIV) formatted?
Both the cut-off index (COI) value and the qualitative interpretation (Non-Reactive / Reactive) are captured in AILS LIMS.
Q: How does AILS handle Cobas e411 emergency cardiac biomarkers (Troponin T, CK-MB)?
Critical panic values trigger immediate on-screen visual alarms and automated SMS notifications to the attending physician.
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Connect Your Roche Cobas e411 (Elecsys) to AILS in Under 15 Minutes
Our specialized biomedical engineering team provides complete plug-and-play drivers, cable diagrams, and bi-directional test verification for the Roche Cobas e411 (Elecsys).