Product Overview
The Emerson A6824 ModBus and Rack Interface Module is a critical component for machinery protection in industrial automation. Designed for high reliability, this 1-slot monitor reads parameters from all AMS 6500 modules and outputs data via ModBus TCP/IP and/or ModBus RTU (serial). It integrates seamlessly with other AMS 6500 monitors to build a complete API 670 machinery protection system, supporting steam, gas, compressors, and hydro turbo machinery. The Emerson A6824 powers local graphical displays and provides machinery health parameters for control systems, enabling predictive maintenance.
Technical Specifications
| Parameter |
Value |
| Power Consumption |
Max. 5 W |
| Operating Temperature |
0°C to 65°C (32°F to 149°F) |
| Storage Temperature |
-30°C to 85°C (-22°F to 185°F) |
| Relative Humidity |
5 to 95%, non-condensing |
| Vibration Resistance |
IEC 68-2: 0.15 mm (10-55 Hz), 19.6 mm/s² (55-150 Hz) |
| Shock Resistance |
IEC 68-2: 98 m/s² peak, 16 ms |
| EMC Resistance |
EN50081-1 / EN50082-2 |
| Module IP Rating |
IP 00 (DIN 40050) |
| Front Plate IP Rating |
IP 21 (DIN 40050) |
| Climate Class |
DIN 40040 KTF |
| Dimensions (PCB/EURO card) |
100 x 160 mm (3.937 x 6.300 in) |
| Width |
30 mm (1.181 in) (6 TE) |
| Height |
128.4 mm (5.055 in) (3 HE) |
| Length |
160 mm (6.300 in) |
| Net Weight |
~320 g (0.705 lbs) |
| Gross Weight |
~450 g (0.992 lbs) (including standard packing) |
| Packing Volume |
~2.5 dm³ (0.08 ft³) |
| Space Requirements |
1 slot; 14 modules per 19" rack |
| Data Output (ModBus RTU) |
19.2 kbaud, 8 data bits, Even parity, 1 stop bit |
| Default IP Address |
192.168.255.1 |
| Subnet Mask |
255.255.255.0 |
| Ethernet Connection |
RJ45 socket, 10BaseT |
Key Applications
The Emerson A6824 ModBus and Rack Interface Module excels in critical rotating machinery protection. Typical applications include steam turbines, gas turbines, compressors, and hydro turbo machinery. It serves as a vital link between AMS 6500 modules and control systems like Ovation and DeltaV. By providing real-time speed, vibration (1x, 2x), gap values, and alarm states, the A6824 enables operators to make informed decisions, reducing unplanned downtime.
Installation and Mounting
The Emerson A6824 is a 3U, 1-slot plug-in module that mounts in a standard 19" rack. It requires no special tools and supports hot swapping for minimal system interruption. The module includes a handle for easy removal and a front plate with identification labels. Ensure the rack provides adequate power (max 5 W per module) and proper grounding. For redundant ModBus paths, configure both TCP/IP and RTU simultaneously. Follow standard ESD precautions during installation.
System Compatibility
The Emerson A6824 integrates seamlessly with AMS 6500 machinery protection systems, including IMR 6000/10, IMR 6000/20, and IMR 6000/30 racks. It communicates via ModBus TCP/IP or RTU, making it compatible with a wide range of distributed control systems (DCS) and PLCs. The module supports up to 14 units per 19" rack, offering scalable protection for large plants. It is API 670 compliant and works with PlantWeb software for advanced diagnostics.
Selection and Purchasing Advice
When selecting the Emerson A6824, verify compatibility with your existing AMS 6500 or IMR 6000 series rack. The standard A6824 is for non-redundant systems, while the A6824-R model supports redundancy. Consider the number of modules required for your application (up to 14 per rack). For reliable sourcing, choose UBEST Automation, a trusted supplier of industrial automation spares. Contact UBEST Automation to confirm stock and lead times, ensuring seamless integration into your maintenance schedule.