Key Technical Specifications
- Product Model: ILB BT ADIO MUX-OMNI 2884208
- Manufacturer: Phoenix Contact
- Product Type: Wireless MUX Set (2 Modules)
- Digital I/O: 16 Inputs / 16 Outputs per module
- Analog I/O: 2 Inputs / 2 Outputs (0-10V, 0-20mA)
- Wireless Standard: Bluetooth 4.0 (2.4 GHz ISM Band)
- Transmission Power: 5 dBm
- Operating Voltage: 24 V DC (19.2…30.5 V DC)
- Connection Time: ≤ 3 s
- Latency: ≤ 10 ms (typical)
- Antenna Type: Omnidirectional (RSMA Female)
- Protection Class: IP20
Product Introduction
PHOENIX ILB BT ADIO MUX-OMNI 2884208 is a paired wireless I/O set designed to eliminate cabling between two points. Each module in the kit provides 16 digital and 2 analog channels, communicating via Bluetooth 4.0 in the 2.4 GHz ISM band.This system operates on a strict plug-and-play principle with no software configuration required. The 2884208 achieves signal transmission in under 3 seconds with typical latency below 10 ms, making it suitable for real-time control loops. (We’ve seen installations fail simply because users didn’t verify the 100m indoor range limit before mounting.)
Installation & Configuration Guide
Preparation (10 min)
Verify you have both modules and the two omnidirectional antennas. Ensure your power supply can deliver 24 V DC with sufficient current for the total load. Confirm the installation path has a clear line of sight or minimal metal obstruction.Removal (5-10 min)
If replacing an existing unit, power down the 24 V DC supply. Disconnect the RSMA antenna connector by hand—do not use pliers. Remove the Inline connector and release the DIN rail latch.Installation (10 min)
Mount both modules on a standard 35 mm DIN rail. Connect the omnidirectional antennas to the RSMA female ports. Do not power on without antennas attached; this can damage the RF front-end. Wire the 24 V DC supply and I/O signals using the spring-clamp terminals.Power-On & Test (10 min)
Apply 24 V DC to both modules simultaneously. Observe the “FS” LED; it should indicate a stable wireless link within 3 seconds. Check the 4-bar signal quality LED. If the link fails, verify antenna orientation and ensure no metal enclosures are shielding the modules.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Probability | Quick Check | Action |
|---|---|---|---|---|
| FS LED Red/Off | No wireless link | 90% | Check antenna connection | Ensure antennas are fully screwed in |
| Intermittent Signal | Metal obstruction | 70% | Check 4-bar LED status | Re-orient antennas or reduce distance |
| I/O Not Updating | Power loss | 80% | Measure 24V at terminals | Verify supply voltage >19.2V |
| Analog Value Erratic | Ground loop | 50% | Measure signal ground | Ensure single-point grounding |
| Module Overheating | Short circuit | 40% | Check output load current | Verify load <500mA per channel |
Dimensions, Mounting & Wiring Notes
- Dimensions: 95 mm (W) × 123.4 mm (H) × 57 mm (D)
- Mounting: Standard 35 mm DIN Rail (EN 60715)
- Antenna Connector: RSMA Female (Do not overtighten)
- Wiring: Spring-clamp terminals for 0.2–1.5 mm² wire
- Grounding: Connect shielded cables to the DIN rail or module ground terminal
- Clearance: Maintain 50 mm spacing between modules for heat dissipation
FAQ
Can I use directional antennas with this kit?
Yes, but you must purchase them separately. The 2884208 kit ships with omnidirectional antennas rated for 50–100m indoors. If you need the 400m outdoor range, swap to Phoenix directional antennas. Just ensure they are RSMA female connectors.Do I need to configure the IP addresses?
No. This is a pure hardware MUX system. There is no IP stack, no web server, and no configuration software. The modules pair automatically via Bluetooth MAC address filtering. (This is a feature, not a bug—it eliminates network security headaches.)What happens if the wireless link drops?
The modules have a built-in fail-safe timer. If the link is lost for >800 ms, the digital outputs will default to a safe state (configurable via hardware dip-switch on some variants, or fixed to OFF). This prevents uncontrolled machine movement during interference events.I lost one module. Can I buy just the replacement?
Technically yes, but it’s complicated. The modules are pre-paired at the factory. A standalone replacement requires a pairing tool or service center intervention to re-pair with your existing unit. We strongly recommend replacing the full 2884208 kit to avoid downtime and pairing fees.Is this suitable for safety circuits?
No. This is a standard I/O module, not a safety-rated device. Do not use it for E-Stop, light curtains, or safety interlocks. The 800 ms fail-safe delay is too long for SIL/PL requirements. Use Phoenix Axioline Safety modules instead.Why is the analog resolution only 12-bit?
Because it’s a wireless MUX, not a precision measurement device. 12-bit (4096 steps) is sufficient for monitoring tank levels or temperature trends. If you need 16-bit precision for lab-grade dosing, this is the wrong tool. Don’t try to force it.Can I daisy-chain more than 2 modules?
No. The 2884208 is a point-to-point Bluetooth link. For multi-drop wireless I/O, you need the Wireless MUX system with a master/base station architecture. This kit is strictly 1-to-1.
