Product Core Brief
- Model: 136711‑01
- Brand: BENTLY
- Series: 3500 Machinery Protection System
- Core Function: Acquires temperature readings from RTD and thermocouple sensors for rotating‑machinery protection.
- Product Type: 6‑Channel RTD / TC I/O Module with internal barriers
- Key Specs: 6 input channels | Internal IS barriers | CSA Class 1 Div 2 ⚠️ EOL — limited stock remaining
Product Introduction
BENTLY 136711‑01 pairs with the 3500/60 monitor to read RTD and thermocouple sensors across turbine and compressor assets. Built‑in intrinsic safety barriers eliminate the need for external barrier hardware in classified zones.
Compared to non‑barrier variants, this unit cuts field wiring steps. It supports 2‑wire, 3‑wire, 4‑wire RTD inputs, and delivers measurement accuracy within ±0.15 % full‑scale —though your mileage may vary with long unshielded sensor cables.
BENTLY 133819‑01
Key Technical Specifications
| Parameter | Value |
|---|---|
| Channel Count | 6 temperature input channels |
| Supported Sensors | 2/3/4‑wire RTD; TC Types J, K, E, T, B, R, S, N |
| Safety Rating | CSA NRTL/C Class 1, Div 2; integrated internal IS barriers |
| Termination | Internal screw‑type terminal blocks |
| Operating Ambient Temperature | ‑40 °C to +70 °C |
| Power Source | 3500 rack backplane; ~7 W typical draw |
| Hot‑Swap Support | Yes (3500 rack compliant) |
| Physical Weight | 0.46 kg |
| Country of Origin | United States |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Source traceability, serial number anti‑counterfeit check, visual inspection (no corrosion/scratches). Check edge connector pins for bending or wear.
- Live Functional Test: Power‑on self‑check, backplane comms handshake, continuous load run >24 hrs with temp logging. Capture LED status snapshots every two hours.
- Electrical Parameter Test: Insulation resistance (500 V Megger, >10 MΩ), ground continuity. Flag any resistance drift below threshold.
- Firmware Verification: Read/record firmware version, photograph DIP switch/jumper settings. Well, technically it supports sensor open‑circuit fault reporting, but only on firmware v4.3+.
- Final QC & Packaging: Anti‑static bag seal, QC Passed label with date. Matching terminal hardware bagged alongside the unit.
Replacement Pitfall Guide
❗ Firmware Mismatch: The unit will reject channel configuration if host rack firmware falls below minimum revision. Older 3500 releases ignore internal‑barrier hardware entirely.❗ DIP Switch / Jumper Misconfiguration: Factory defaults rarely match field settings. Pay close attention to sensor‑type jumpers on the first terminal block.❗ Terminal / Cable Incompatibility: Pin definitions shift across part revisions. Cross‑reference wiring drawings before connecting shield grounds for hazardous‑area loops.❗ Power Supply Mismatch: Recalculate total rack power with 20% headroom. Adding this module can push marginal power supplies over their continuous rating.❗ ESD Damage: Use anti‑static mat; caution in dry environments. Static discharge can degrade temperature‑channel performance with no visible physical damage.
Keep these in mind and you’ll cut 90% of rework time.
BENTLY 133442‑01
Compatibility Matrix & Benchmarks
- Scan cycle: 14 ms (simulated load, 6 active temperature input channels)
- Comms throughput: Backplane bus 384 kbps (proprietary 3500 rack bus)
