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

• 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.