Acromag, Inc. Digital Output Module, TTL Level IP470A

48 bi-directional input/output channels TTL-compatible inputs CMOS-compatible open-drain outputs Interrupt support for each channel 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 read back 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 read back capability eliminates the need for additional input channels to verify 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. Features • 48 bidirectional input/output channels TTL-compatible inputs CMOS-compatible open-drain outputs Interrupt support for each channel Input debounce Electronic overvoltage protection on individual channels Open drain outputs with socketed pull-ups Output read back registers 0 to 70°C (IP470) or -40 to 85°C (IP470E model).