ABB AC 800F Freelance 2000 Controller
Description
AC 800F opens up the flexibility of Fieldbus technology to the user. The AC 800F collects and processes diagnostic and process data from four Fieldbus lines, which may be of different types. It does this in addition to the tasks of a “conventional” process station.
The AC 800F is available in two versions:
• 4 MB static RAM, 4 MB EPROM
• 16 MB synchronous dynamic RAM, 8 MB EPROM
Up to 4 (different) fieldbus modules can be plugged into the AC 800F. The communication with other controllers runs via Ethernet.
The AC 800F optionally provides several levels of redundancy:
• device redundancy with 2 AC 800F
• power supply redundancy (24 V DC)
• Ethernet communication redundancy (standard)
• Cable redundancy for Profibus DP, requires external equipment (RLM01)
Features
• Process Station with integrated fieldbus capability
• 4 high-speed fieldbus lines
• Supports different fieldbus types, even simultaneously: PROFIBUS-DP, up to 12 MBd Modbus CAN Foundation Fieldbus H1 (with LD800 HSE)
• Easy engineering: fully integrated in Control Builder F
• One unified database for field devices shared by the control level and the Human System Interface (HSI)
• Module recognition with factory and operational parameters
• Comprehensive diagnostics for proactive maintenance
• Compact, rugged design
• Front panel connectors
• DIN Rail (C-rail) or wall mounting for easy installation
• Ambient temperature 0-60 °C (32-140 °F) with temperature monitoring
• EMC certification according to EN50082
• Certification: CE, NAMUR, CSA, UL, EN61000-6-2.
AC 800F Controller Redundancy
Controller redundancy can be achieved by installing two AC 800F. To ensure quick and smooth takeover by the secondary AC 800F in case the primary AC 800F fails, a dedicated redundancy communications link through the second Ethernet module makes sure that both AC 800F are always synchronized. All inputs and outputs are designed to support redundant operation.
Profibus Line Redundancy
Using the Redundancy Link Module RLM 01 will do the conversion of one simple, non-redundant Profibus line into two reciprocally redundant lines.
You can position the Redundancy Link Module RLM 01 directly after a Profibus module (master), before a bus segment with several slaves or before an individual slave. PROFIBUS stations with redundant couplers can be directly connected to the PROFIBUS set redundant by RLM 01. Stations with only one interface can be optionally assigned to the one or other line. For technical description dates of the Redundancy Link Module RLM 01 see document 3BDD011600R0201.
An alternative solution to the Profibus line redundancy is to use a Fiber Optic Ring, for example with the OZD Profi 12M module from firm Hirschmann
AC800F Redundancy together with Profibus Line Redundancy
You can achieve both; controller redundancy and Profibus line redundancy by using two AC 800F with one RLM01 each. This topology combines the advantages of controller redundancy with the one of line redundancy as described in the above paragraphs.
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