Access I/O IIRO-8 Access ISA-IIRO-8 Isolated Digital Inputs+Relay Outputs on ISA
- Condition : Used
- Dispatch : 3 Days
- Brand : Access IO
- ID# : 199350293
- Quantity : 1 item
- Views : 131
- Location : United States
- Seller : bizsurplus (+90)
- MPN : iiro-8
- Start : Thu 21 Oct 2021 03:48:39 (BST)
- Close : Run Until Sold
- Remain : Run Until Sold

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Access I/O IIRO-8 Access ISA-IIRO-8 Isolated Digital Inputs+Relay Outputs on ISA
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Access I/O IIRO-8 Access ISA-IIRO-8 Isolated Digital Inputs+Relay Outputs on ISA bus
IIRO-8 Eight Isolated Digital Inputs and Eight Relay Outputs on the ISA Bus
Features
IIRO-8 is a low-cost, half-size card that provides isolated input and output interface for PC/XT/AT and compatible computers. The card provides eight optically-isolated inputs for AC or DC control signals and eight electromechanical relay outputs. Inputs are optically isolated from each other and from the computer. They can be driven by either AC or DC signals and are not polarity sensitive. Thus inputs can be driven from standard 12/24 VAC control transformers as well as by DC voltages. Input voltage range is 5 to 24 Volts (rms). External resistors connected in series can be used to extend this input range.
Each input circuit contains a switchable slow/fast filter that has a 10 millisecond time constant. The filter must be selected for AC inputs but may be switched out in order to obtain faster response for DC inputs. The filter is also useful for slowly-changing noisy DC inputs. A DIP switch on the card permits filter selection on a channel-by-channel basis. Alternatively, you can globally switch all filters in or out under software control.
Another feature of this card is the ability to detect if a state change occurs at any one or more of the inputs and, in turn, assert an interrupt. This is very useful when monitoring for contact closures/openings because it is not necessary to continuously poll the inputs. When the IIRO-8 detects a state change, the resulting interrupt request can be used to initiate a poll of the inputs to determine which line(s) changed. After the interrupt has been serviced, the interrupt latch can be cleared by a software write.
The electromechanical relay outputs are comprised of five Form C SPDT outputs and three Form A SPST (normally open) type. On/Off status of the relays can be read back. All relays are de-energized at power turn-on. IIRO-8 occupies four consecutive addresses in I/O space. The base address can be selected anywhere within the address range 000-3FF (hex). Read and write operations are done on an 8-bit byte-oriented basis. All input/output connections are via a single 37-pin D connector at the rear of the card.
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On these listings, our company's condition "used" does NOT necessarily mean "fully operational and functions as intended". If fact it may have unknown flaws and deficiencies. the item has only been tested to the extent described in the item condition/testing notes. Additional testing may be performed upon request of the buyer before shipment to ensure a satisfactory transaction for both parties.
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Listing Information
Listing Type | Gallery Listing |
Listing ID# | 199350293 |
Start Time | Thu 21 Oct 2021 03:48:39 (BST) |
Close Time | Run Until Sold |
Starting Bid | Fixed Price (no bidding) |
Item Condition | Used |
Bids | 0 |
Views | 131 |
Dispatch Time | 3 Days |
Quantity | 1 |
Location | United States |
Auto Extend | No |
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Returns Policy
Returns Accepted
Refund Type: Money Back
Shipping Cost Paid by: Buyer
Returns Within: 14 Days