The ACC-11E is a 3U rack-mounted isolated I/O backplane board that provides 24 optically isolated digital inputs and 24 optically isolated digital outputs for UMAC-Turbo and UMAC-MACRO motion control systems. Signal isolation via optical coupling protects sensitive control electronics from electrical noise and interference while maintaining reliable data transfer across the UMAC BUS (UBUS).
Technical Specifications
I/O Configuration
• 24 digital inputs, 24 digital outputs
• Optical isolation using PS2705-4NEC-ND quad photo-transistor opto-isolators
• Input activation range: 12 V to 24 V DC
• Output current: 100 mA per output point
Output Driver Options
• Sourcing configuration (Option-A): UDN2981A or equivalent octal drivers
• Sinking configuration (Option-B): ULN2803A or equivalent octal drivers
Connectivity & Addressing
• Data transfer via UMAC BUS (UBUS)
• I/O control through M-variables
• One address per chip select using low-byte, middle-byte, and high-byte addressing scheme
• Supports maximum of twelve I/O cards per system
• Removable terminal block connectors for field wiring
Physical Dimensions
• Length: 16.256 cm (6.4 in.)
• Height: 10 cm (3.94 in.)
• Width: 2.03 cm (0.8 in.)
– Key Features
• Optical isolation eliminates common-mode voltage issues between input and output circuits
• Selectable output driver configuration accommodates both sourcing and sinking applications
• Modular design supports up to twelve cards for expanded I/O capacity
• Two enclosure options: open 3U mounting (3A0 prefix) or enclosed frame-compatible design (3R0 prefix)
• Optional 15-pin female D-Sub connector interface available
– Typical Applications
• Industrial automation and machine control requiring galvanic isolation
• Motion control systems with distributed I/O across multiple control nodes
• Applications demanding noise immunity in electrically harsh environments
– Compatibility & Integration
The ACC-11E integrates directly with UMAC-Turbo and UMAC-MACRO CPU boards through the backplane expansion port. Front panel, enclosure, and connector options provide flexibility for both open-frame and enclosed cabinet installations.
