Allen-Bradley 1786-BNC/B ControlNet Coaxial Taps
$123.00
$320.00
Description
Allen-Bradley 1786-BNC/B ControlNet Coaxial Taps
Configured for high-speed deterministic token-pass signal tapping in ControlNet installations, the Allen-Bradley 1786-BNC/B (1786-BNC Coaxial Media Tap) provides direct physical execution of node drop connections without interrupting trunk cable integrity.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1786-BNC/B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.04 lbs |
| Dimensions | 58.4 mm x 36.0 mm x 41.9 mm |
| Operating Temp | -20 deg C to +70 deg C |
| Power Consumption | Passive Component (0 W) |
| Media Type | RG-6 ControlNet Coaxial Trunk Cable |
| Connector Type | BNC (Bayonet Neill-Concelman) |
| Max Nodes | 48 nodes per network segment |
| Minimum Tap Spacing | 1 m between adjacent taps |
| Trunk Termination | 75 ohm (1786-XT required at trunk line ends) |
| Ingress Protection | IP67 (when fully mated) |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | 5-95% non-condensing |
| Vibration / Shock | 10 g peak at 10-500 Hz / 30 g operating shock |
Industrial Network Taps & Bus Infrastructure
The hardware executes deterministic signal coupling onto the backplane and drop cable layer without injecting active propagation delay. Proper physical layer impedance matching is maintained across the passive circuitry to minimize signal reflections and standing waves on high-velocity ControlNet segments running at 5 Mbps. Utilizing robust coaxial BNC connections, the tap module protects network signaling integrity against high electrical noise environments and maintains signal fidelity across all 48 potential node drops.
Frequently Asked Questions
Q: Does the 1786-BNC/B draw any electrical power from the ControlNet trunk cable or backplane?
A: No. The 1786-BNC/B is an entirely passive signal-coupling device. It contains no active semiconductor components and draws zero current from the network or connected nodes.
Q: What happens if tap spacing along the RG-6 trunk cable is less than 1 m?
A: Spacing taps closer than 1 m causes cumulative impedance mismatches and signal reflections on the 5 Mbps ControlNet coaxial trunk line, leading to packet frame errors and potential node dropouts.
Q: Can standard residential-grade RG-6 coaxial cable be used with this tap?
A: No. Quad-shielded, quad-braid industrial ControlNet-rated cable (such as Allen-Bradley 1786-RG6) must be used. Standard commercial RG-6 lacks the exact impedance tolerances and shield effectiveness required for industrial noise immunity.
Field Installation Guidelines
- Mount the tap securely using the integrated mounting screw to a clean, grounded panel surface or dedicated enclosure interior.
- Route the RG-6 coaxial trunk cable maintaining a minimum bending radius of 76 mm to prevent physical deformation of the dielectric core.
- Keep coaxial cable runs separated from high-voltage AC wiring and variable frequency drive (VFD) output leads by at least 200 mm to prevent electromagnetic interference.
- Verify that 75-ohm terminators (Allen-Bradley 1786-XT) are installed at both physical ends of the ControlNet trunk line segment.
- Ensure BNC bayonet connectors are turned and fully locked into position to maintain the IP67 seal integrity and low-resistance shield contact.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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