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FR 104-IIRO-8
Isolated Digital Input and Relay Output Card
104-IIRO-8
The 104-IIRO-8 is a low-cost card that provides isolated input and output for PC/104 Bus computer applications. The card has eight optically-isolated digital inputs for AC or DC control signals, eight TTL Inputs and eight electro-mechanical relay outputs. An Economy version can be ordered as Model 104-IIRO-8E which has no Change of State Dectection or IRQs. INPUTS The isolated inputs can be driven by either AC or DC and are not polarity sensitive. Input signals are rectified by photo coupler diodes. A 1.8KΩ, ½ Watt resistor in series provides current limiting. The input voltage range is 3V to 28V (rms). To extend the input voltage range, you may connect external resistors in series with the input. Each input circuit is switch selectable for slow/fast filter that has a 4.7 millisecond time constant. The filter must be selected for AC inputs in order to eliminate response to AC noise. The filter is also valuable for use with slow DC input signals in a noisy environment. The filter may be switched out for DC inputs in order to obtain faster response. Filters are manually switched individually on or off. INTERRUPTS Interrupts are enabled/disabled by software. When the change-of-state detection circuit is enabled, the card asserts an interrupt whenever any of the eight isolated inputs change state. Once an interrupt has been generated and serviced, it is automatically cleared. This feature greatly frees up system resources by eliminating the need for constant polling to see when an input has changed state. OUTPUTS The electro-mechanical relay outputs are comprised of one group of eight form C SPDT outputs. The relays are all de-energized at power-on. Data to the relays is latched. CONNECTIONS The I/O is accessed via a 50 pin header type.
- Brand: Acces IO
- Slow/fast filter to accommodate AC voltages and noisy DC inputs
- 8 long-life form C electro-mechanical relays switch up to 1A each
- 8 non-isolated TTL compatible inputs
104-IIRO-8
ACCES I/O, Digital & Analogue I/O, PC/104 & PCI-104 Digital & Analogue Modules, Serial Communication
Details
The 104-IIRO-8 is a low-cost card that provides isolated input and output for PC/104 Bus computer applications. The card has eight optically-isolated digital inputs for AC or DC control signals, eight TTL Inputs and eight electro-mechanical relay outputs. An Economy version can be ordered as Model 104-IIRO-8E which has no Change of State Dectection or IRQs. INPUTS The isolated inputs can be driven by either AC or DC and are not polarity sensitive. Input signals are rectified by photo coupler diodes. A 1.8KΩ, ½ Watt resistor in series provides current limiting. The input voltage range is 3V to 28V (rms). To extend the input voltage range, you may connect external resistors in series with the input. Each input circuit is switch selectable for slow/fast filter that has a 4.7 millisecond time constant. The filter must be selected for AC inputs in order to eliminate response to AC noise. The filter is also valuable for use with slow DC input signals in a noisy environment. The filter may be switched out for DC inputs in order to obtain faster response. Filters are manually switched individually on or off. INTERRUPTS Interrupts are enabled/disabled by software. When the change-of-state detection circuit is enabled, the card asserts an interrupt whenever any of the eight isolated inputs change state. Once an interrupt has been generated and serviced, it is automatically cleared. This feature greatly frees up system resources by eliminating the need for constant polling to see when an input has changed state. OUTPUTS The electro-mechanical relay outputs are comprised of one group of eight form C SPDT outputs. The relays are all de-energized at power-on. Data to the relays is latched. CONNECTIONS The I/O is accessed via a 50 pin header type.
Ordering Info
- 104-IIRO-8
- – With Change of State
- 104-IIRO-8E – Without Change of State
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Specification
- 8 optically-isolated, non-polarized CMOS compatible digital inputs accept ±31VDC or AC rms
- IRQ on input change of state (COS) eliminates the need for constant polling
- Slow/fast filter to accommodate AC voltages and noisy DC inputs
- 8 long-life form C electro-mechanical relays switch up to 1A each
- 8 non-isolated TTL compatible inputs
Delivery Information
Orders dispatched from Assured Systems USA will be delivered using FedEx.
Payment Methods & Options
Accepted payment methods for US customers include bank transfer, VISA or Mastercard in USD.
ACCES I/O: Warranty and Service Information
All ACCES I/O products distributed in the EMEA come with a 2 year warranty as standard, with additional extension options available upon request. As an official ACCES I/O partner, we are proud to provide customers with peace of mind and the highest quality products, including any systems which have been configured to meet individual specifications.
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