IP470A: Digital Output Module, TTL Level

IP470A Industrial I/O Pack (IP) modules provide 48 general-purpose, bidirectional I/O points to economically monitor and control a large quantity of digital devices.

Each channel has interrupt capability for detecting low-to-high or high-to-low transitions. Change-of-state interrupts are supported using paired channels. Debounce eliminates interrupts from noise and switching transients for error-free edge detection.

IP470A outputs are full-featured. They have socketed pull-ups and provide closed-loop readback status monitoring. TTL level thresholds and 15mA sink capability allow a direct interface to standard relay racks. And for safety, outputs go to a failsafe state upon power-up/reset without any instantaneous toggling to prevent false alarms.

Benefits

• Output readback capability eliminates the need for additional input channels toverify the output channel state.
• Pinouts are compatible with industry-standard isolated I/O racks.
• Output channels do not “glitch” after a power-up/reset to eliminate false alarms.

The IP470A is a drop-in replacement for the IP470, please see the known differences document below for more information.
Known Differences Between the IP470 and the IP470A

Specifications

Digital Inputs

Input channel configuration: 48 buffered inputs.
Input voltage range: 0 to 5V DC.
Input signal threshold: 1.5V typical.
Input response time: 135nS.

Digital Outputs

Output channel configuration: 48 open-drain CMOS outputs.
Output voltage range: 0 to 5V DC.
Output “ON”current range: 0 to 15mA DC.
Output pull-ups: 4.7K ohms pull-ups installed in board sockets. With pull-ups removed, integrated 47.5K ohms nominal pull-ups are present.
Turn on time: 125nS, typical.
Turn off time: 3μS, typical.

IP Compliance (ANSI/VITA 4)

Meets IP specifications per ANSI/VITA 4-1995.
IP data transfer cycle types supported: Input/output (IOSel*), ID read (IDSel*), Interrupt select (INTSel*).
Access times (8MHz clock): 0 wait states (250ns cycle).
Updates: Requires six 8-bit read/writes to update all 48 channels.

Environmental

Operating temperature: 0 to 70°C (IP470) or -40 to 85°C (IP470E model).
Storage temperature: -55 to 150°C (all models).
Relative humidity: 5 to 95% non-condensing.
MTBF: Contact the factory.
Power: +5V (±5%): 160mA maximum. ±12V (±5%) from P1: 0mA maximum (not used).