Product Short Description
Product Name: Delta Tau ACC-24E2 2-Channel Axis Expansion Board (Digital Amplifier Breakout with TTL Encoder Inputs)
Product Overview: The ACC-24E2 is an axis expansion board in the UMAC family of expansion cards. It provides two (or optionally four with Option 1 piggyback) channels of PMAC2-style direct PWM servo interface circuitry for UMAC and Ultralite/MACRO Station controllers. It communicates with the UMAC or MACRO Station CPU via the high-speed UBUS expansion bus.
Description
Key Technical Specifications:
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Manufacturer: Delta Tau Data Systems (now part of Omron)
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Channels: 2 axes (base configuration); expandable to 4 axes with Option 1 piggyback
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Servo IC: One 4-channel PMAC2-style Servo IC (2 channels brought out on base board)
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Analog Output (with relevant variants): ±10 V DC command signals
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Output Command Signal Sets per Channel (configurable):
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One pulse-and-direction
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Three PWM top-and-bottom pairs
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Encoder Input: AB Quadrature and Index pulse, differential/single-ended
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Flags: Nine input flags, two output flags per channel
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External Serial ADC Interface: 2 channels, 8 to 18 bits, for current loop feedback
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Interface Options: Direct PWM amplifier connector; Terminal block option for encoders and EQU; DB15 connector option for encoders and EQU
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Power: Supplied via backplane; for the entire Acc-24E2 family, specific power requirements apply
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Up to eight Acc-24E2x boards can connect to one UMAC (32 additional servo channels)
Features:
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Direct digital Pulse-Width Modulated (PWM) phase voltage commands
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Pulse-and-direction commands supported
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High-speed UBUS expansion bus communication with deterministic timing
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Modular scalability: 2-axis base, expandable to 4-axis with Option 1
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TTL encoder inputs for closed-loop feedback
Applications: High-precision motion control in semiconductor manufacturing, CNC machining, robotics, and scientific research requiring analog servo interface to PMAC controllers.
Installation & Usage Notes: Plug into 3U industrial rack system UMAC backplane, occupying one slot. For 4-axis configuration, add Option 1 piggyback occupying a second slot. Connect encoder and amplifier wiring to terminal blocks or DB15 connectors as configured. Handle with ESD precautions (contains static-sensitive components). Avoid contact with highly insulated materials during installation.
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