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| Parameter | Specification |
|---|---|
| Model | FS‑BN‑1608 |
| Product Type | Safe Namur Sensor Converter |
| Input Channels | 16 |
| Input Current Range | 0 – 8 mA |
| Maximum Input Current | 20 mA |
| Input Resistance | 1 kΩ ± 1% |
| Cable Capacitance Limit | < 16 µF |
| Earth Resistor | 100 kΩ 1% |
| Maximum Power Dissipation | 0.6 W |
| Dimensions (L × W × H) | 58.5 mm × 28.5 mm × 9 mm |
| Weight | ~ 0.06 kg (estimated from small module size) |
| Mounting | Mounted on backplane / programming connector slot |
| Certifications / Approvals | CE, TUV, UL, CSA, FM (for safety use) |
| Chassis Space Required | None additional (fits in existing I/O rack slot) |
Notes: According to Honeywell’s “Safety Manager” manual (section 9.10) the BN‑1608 is an input converter module with 16 channels, 0‑8 mA input range, 1 kΩ input resistance, dissipation 0.6W, physical dimensions 58.5×28.5×9 mm.
The FS‑BN‑1608 is a Safe Namur Sensor Converter module used in industrial safety systems to interface intrinsically safe Namur sensors with the control or safety logic of a system. “Namur” sensors are common in hazardous or explosion‑risk zones, providing low current signals (typically 0‑8 mA) when actuated.
This module converts the raw Namur sensor input signals into forms that are compatible with the safety logic and backplane of the Honeywell Safety Manager / Safety I/O architecture. It ensures that sensors in hazardous zones can be reliably and safely monitored within a certified safety loop.
This converter is designed to fit within the Honeywell safety I/O backplane or programming connector slots in the control rack, occupying minimal physical space, and is intended for use in safety-critical applications where integrity, diagnostics, and compliance are required.
Monitoring of safety sensors (proximity switches, limit switches, vibration sensors) in hazardous or classified zones
Integration of Namur sensor circuits into safety logic racks
Use in safety instrumented systems (SIS) in chemical, petrochemical, oil & gas, and process industries
Backup / interface module in industrial control cabinets
Applications requiring signal conversion of intrinsically safe sensors for higher-level logic
Safety certified: Complies with safety standards and approvals suitable for hazardous environments
Compact size: Very small module footprint (58.5 mm × 28.5 mm × 9 mm), saving rack space
Low power dissipation: Only 0.6 W, thus minimal thermal impact
High channel density: 16 input channels in one module
Signal integrity: Converts low‑mA Namur signals reliably for use in safety logic
Ease of integration: Fits on existing backplanes / programming connectors without additional rack space
Diagnostics support: Works with safety system diagnostics to detect faults, such as open circuits or short circuits
| Attribute | Detail |
|---|---|
| Brand | Honeywell |
| Product Series | FS / Safety Manager I/O Modules |
| Function Family | Input Converter / Sensor Interface |
Here are five modules in similar function (sensor converters, input modules) or from the same Honeywell Safety / FS family:
| Model | Role / Function | Key Specs (short) |
|---|---|---|
| FS‑BN‑1608 | Namur input converter (this model) | 16 channels, 0‑8 mA, 58.5×28.5×9 mm |
| FS‑BSN‑1608 | Sensor converter for safety signals | Passive Namur conversion, 16 channels |
| FS‑SDIL‑1608 | Safe digital input module | 16 channels, supports converted Namur input |
| FS‑BN‑0816 | 8‑channel Namur converter (hypothetical) | 8 channels, similar input specifications |
| FS‑BSN‑0816 | Safety sensor converter (8 channels) | Converts Namur signals to safe logic levels |
Here are five well-known modules from Honeywell’s automation / safety / FS family (not necessarily Namur converters) that are often used in industrial systems:
| Model | Type / Role | Typical Specs (summary) |
|---|---|---|
| FS‑SDIL‑1608 | Safe digital input logic module | 16 channels, monitors safety sensor signals |
| FS‑TRO‑0824 | Digital output relay module | 8 relay outputs, control logic outputs |
| FS‑SAO‑0220 | Safe analog output module | 2 analog outputs (4‑20 mA) |
| FS‑SIO‑1608 | Safe I/O expansion module | Mixed safe I/O channels |
| FS‑DO‑0824 | Standard digital output module | 8 digital outputs |
Q1: What does the FS‑BN‑1608 do?
A1: It converts Namur (intrinsically safe) sensor signals into a format compatible with Honeywell safety logic modules.
Q2: How many input channels does it support?
A2: It supports 16 independent input channels.
Q3: What is the input current range?
A3: The valid input range is 0 to 8 mA.
Q4: What is its maximum input current?
A4: The absolute maximum current for the module is 20 mA.
Q5: What is its power dissipation?
A5: Maximum power dissipation is about 0.6 watts.
Q6: What are its physical size and weight?
A6: Dimensions are 58.5 mm × 28.5 mm × 9 mm. Weight is small (approx. 0.06 kg for module housing).
Q7: Can this module be added without extra rack space?
A7: Yes — it is designed to mount on the backplane / connector slot without taking extra chassis slots.
Q8: What safety approvals does it hold?
A8: It has CE, TUV, UL, CSA, FM and other safety‑oriented certifications suitable for industrial use.
Q9: What is the input resistance?
A9: The input resistance is 1 kΩ ± 1%.
Q10: Why use a Namur converter instead of directly wiring sensors?
A10: Direct wiring may not be compatible with safety logic; the converter ensures signal conditioning, isolation, diagnostics, and compliance in hazardous environments.
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