Acromag IP470 Digital I/O IndustryPack Module

The Acromag IP470 is a 48-channel bidirectional digital I/O IndustryPack module engineered for industrial data acquisition, process control, and automation systems. It delivers CMOS and TTL-compatible inputs and outputs across a single compact module, with support for VMEbus and PCI interfaces via carrier board selection. Up to four IP470 modules can be installed on a single carrier board to achieve 192 I/O points per system slot.

– Technical Specifications

Channel Configuration
• 48 bidirectional digital I/O channels
• Programmable per-line event sense with interrupt support
• Change-of-state interrupt capability using paired channels

Input Specifications
• Voltage range: 0 to 5V DC
• Signal threshold: 1.5V typical
• Response time: 135 nS
• Input capacitance: 10 pF typical, 20 pF max
• Programmable debounce with hysteresis; debounce error ±250 nS
• Buffered inputs with minimal hysteresis

Output Specifications
• Open-drain CMOS architecture
• Voltage range: 0 to 5V DC
• Sink capability: 0 to 15 mA DC
• Output Low Voltage (VOL): 0.2V typical, 0.4V max at 12 mA
• Output ON Resistance: 33 Ω
• Turn-on time: 125 nS typical
• Turn-off time: 3 µS typical
• Socketed 4.7 kΩ pull-up resistors with integrated 47.5 kΩ nominal alternatives
• Output readback verification without additional input channels
• Failsafe state on power-up/reset without instantaneous toggling

Data Transfer & Access
• Compliant with ANSI/VITA 4-1995 IndustryPack specifications
• Supported cycle types: Input/output (IOSel*), ID read (IDSel*), Interrupt select (INTSel*)
• Access time at 8 MHz clock: 0 wait states (250 nS cycle)
• All 48 channels updated via six 8-bit read/write operations

Power Requirements
• +5V (±5%): 160 mA maximum
• ±12V (±5%): 0 mA maximum (not used)
• Configuration time: 200 mS maximum post power-up

– Key Features

• Independent event sense inputs without mandatory interrupt assignment
• Noise immunity through programmable debounce and hysteresis
• Backward compatible with IP470A while maintaining predecessor functionality
• No instantaneous output toggling prevents false alarms during initialization

– Typical Applications

Process automation, machine control interfaces, sensor signal acquisition, relay and solenoid control, PLC integration, and distributed I/O systems requiring mixed-signal switching and feedback.