Product Core Brief
- Model: 136294‑01
- Brand: BENTLY
- Series: Nevada Machinery Protection System
- Core Function: Transforms monitor internal data and external process signals into isolated 4‑20 mA loop signals.
- Product Type: Rack‑mount Isolated Analog I/O Module
- Key Specs: 4‑20 mA Isolated I/O | ±0.25 % FS Accuracy | 10 kV transient surge protection ⚠️ EOL — limited stock remaining
BENTLY 136294‑01
Product Introduction
BENTLY 136294‑01 handles galvanically separated analog signal conversion for machinery protection racks. It bridges field transmitters and plant‑side DCS hardware without introducing ground‑loop noise.
Compared to lower‑density sibling cards, this unit delivers ±0.1 % FS repeatability. Operating ambient spans ‑40 °C to +85 °C, suited for unconditioned cabinet installations —though your mileage may vary near direct heat sources.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Signal Interface | Isolated 4‑20 mA Input / Output |
| Basic Accuracy | ±0.25 % full‑scale |
| Repeatability | ±0.10 % full‑scale |
| Transient Surge Rating | 10 kV field‑side protection |
| Operating Ambient Temperature | ‑40 °C to +85 °C |
| Power Source | System backplane, no external field power |
| Termination | Detachable screw terminal blocks |
| Physical Weight | 0.42 kg |
| Hot‑Swap Support | Not supported; full rack power removal required |
| 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 loop diagnostic reporting, but only on firmware v4.1+.
- Final QC & Packaging: Anti‑static bag seal, QC Passed label with date. Terminal blocks get bagged alongside the unit.
BENTLY 136294‑01
Replacement Pitfall Guide
❗ Firmware Mismatch: The unit will not join the rack if host firmware falls outside the supported revision range. Older system releases ignore this hardware entirely.❗ DIP Switch / Jumper Misconfiguration: Factory defaults rarely match field settings. Pay close attention to bus termination resistor jumpers on the third terminal block.❗ Terminal / Cable Incompatibility: Pin definitions shift across part revisions. Cross‑reference wiring drawings before connecting shield grounds.❗ 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 analog channel performance with no visible physical damage.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- Scan cycle: 12 ms (simulated load, 8 analog I/O points)
- Comms throughput: Backplane bus 250 kbps (proprietary system bus)
