The ACC-84E is a universal serial encoder interface board designed for OMRON UMAC and MACRO Station controllers operating within a 3U industrial rack system. It converts serial encoder data into parallel digital feedback, supporting up to 4 channels per board and enabling position and velocity feedback for closed-loop servo control. The board connects via the high-speed JEXP expansion bus and processes encoder data into 24-bit binary parallel words per channel, depending on protocol specifications. Each board is factory-programmed for a single serial encoder protocol; multiple protocols require separate boards.
Technical Specifications
Encoder Channels: Up to 4 channels of serial encoders per board
Data Output: Up to 4 × 24-bit binary parallel words per channel (protocol-dependent)
Expansion Capacity: Up to 12 ACC-84E boards per OMRON UMAC (48 total channels); maximum 2 boards per MACRO Station CPU (8 servo channels)
Power Consumption: 5V @ 360 mA (±10%)
Auxiliary Voltage Rails: +15V @ 0 A, -15V @ 0 A
Operating Temperature: 0 to 55°C
Operating Humidity: 10% to 95% (non-condensing, no icing)
Atmosphere: Corrosive gas-free environment required
Form Factor: 3U panel-mount enclosure
– Key Features
• Supports 9 industrial serial encoder protocols programmed into on-board FPGA: SSI, EnDat 2.2, Yaskawa Sigma II/III/V, Tamagawa OAS/SA, Panasonic A4/A5, Mitutoyo ENSIS (AT503/AT503A/ST70X), BiSS B/C, Mitsubishi HG-X, and Omron 1S Series
• Single protocol per board; multi-protocol systems require multiple ACC-84E units
• High-speed parallel data output for precise position and velocity feedback
• Static-sensitive components require ESD precautions during handling
– Compatibility & Integration
Connects exclusively to OMRON UMAC and OMRON Ultralite/MACRO Station controllers via JEXP expansion bus. Supports brushless and AC induction motor commutation applications.
