IC904C Black Box Relay/Digital I/O Card

The Black Box Relay/Digital Series I/O Cards use the I/O cards for easy PC-based control and automation of satellite antenna systems, video and audio automation, security control systems, and similar industrial automation systems. Use one of the plug-and-play Relay/Digital I/O Cards for PCI (IC904C-LP, IC903C-R2, IC909C) to convert a PCI bus slot into manageable I/O ports. The PCI I/O cards are the perfect choice for integrating unattended status monitoring equipment and fallback network switching circuits.

All the input/output cards feature selectable I/O port addressing from 100H–3FFH; one or two sets of SPST relays with each set having eight relays; one or two 8-bit input ports; an 8-bit slot connector; and TTL compatible address, data, and control signals. These three PCI cards feature ports that can be used for either input or output. The Relay Digital I/O PCI low-profile card (IC904C-LP) provides eight optically isolated inputs and eight reed relay outputs. The card includes a a low-profile PCI bracket that works in a low-profile PCI slot. The IC903C-R2’s 32 channels consist of four 8-bit ports of I/O that you can configure for input or output. These channels of buffered-drive digital I/O emulate 8255 mode zero. To select the mode of each of the four ports, simply write a control word to the port register. You can even customize the combination of inputs and outputs per your application requirements. The IC909C has the same capabilities as the IC903C-R2 but spread across 48 channels (six 8-bit ports). Optically isolated inputs have sensors that can be used to interface a voltage input and then sense whether the voltage is on or off. Each sensor is isolated (with respect to common ground) from every other sensor and also isolated with respect to the host PC ground. This means that signals such as AC line voltage and control relay signals can be read by the PC without the risk of damage from ground loops or ground faults.