IP440A: Digital Input Module, Isolated

IP440A Industrial I/O Pack (IP) modules provide 32 optically isolated inputs to safely monitor a wide range of digital input voltage levels.

Isolation protects your computer system from noise, transient signals, and field wiring faults. The inputs are grouped into four 8-channel ports. Ports are isolated from the logic and each other.

Change-of-state interrupts are supported using paired channels. Debounce eliminates spurious interrupts from noise and switching transients for error-free edge detection.

Closed-loop monitoring of critical control signals is easily accomplished using the IP440A in conjunction with Acromag’s IP445 digital output module.

The IP440A is a drop-in replacement for the IP440, please see the known differences document below for more information.
Known differences between the IP440 and the IP440A statement.

Specifications

Digital Inputs

Input channel configuration: 32 optically isolated inputs.
Isolation: Logic and field connections are optically isolated. Individual ports are also isolated from each other. Input lines of individual ports share a common connection and are not isolated from each other. Logic and field lines are isolated from each other for voltages up to 250V AC rms 250V DC on a continuous basis (unit will withstand a 1500V AC dielectric strength test for one minute without breakdown).
Bipolar input voltage range: IP440A-1: ±4 to ±18V DC or AC peak; IP440A-2: ±16 to ±40V DC or AC peak; IP440A-3: ±38 to ±60V DC or AC peak.
Input low-to-high threshold: IP440A-1: ±2V typical; IP440A-2: ±6.8V typical; IP440A-3: ±13.75V typical.
Input response time: On to off: 15μS typical. Off to on: 10μS typical.
Interrupts: 32 channels configurable as below. High-to-low transitions. Low-to-high transitions. Change-of-state (two inputs required).
Debounce: Selectable for 4μS, 64μS, 1mS, or 8mS.

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 four 8-bit reads to update all channels.

Environmental

Operating temperature: 0 to 70°C (IP440A-1/2/3) or -40 to 85°C (IP440A-1E/2E/3E models).
Storage temperature: -55 to 150°C (all models).
Relative humidity: 5 to 95% non-condensing.
MTBF: Contact the factory.
Power: +5V (±5%): 150mA maximum,65mA typical. ±12V (±5%): 0mA (not used).