INTERWORLD Electronics has released a range of PC/104 data acquisition and control modules.
PC/104 is a compact implementation of the ISA PC bus that satisfies the space and power constraints of embedded control applications. The PC/104 standard offers full architecture, hardware and software compatibility with the PC ISA bus in a 91.44mm x 96.52mm stackable form factor.
The range includes high current sink (64mA) digital I/O modules which are suitable for connection to external isolation or for driving optically-isolated relays. The 104-DIO24 has 24 high current sink TTL I/O lines while the 104-DIO48 has 48 I/O lines. The 104-DIO24S and 104-DIO48S provide 24 or 48 I/O lines with input change of state detection which uses an interrupt to notify your application when voltage levels have changed. This allows the inputs to be monitored without the need for continuous software polling.
The isolated input and electromechanical relay modules are designed to be connected directly to high voltages. Optically-isolated inputs can monitor the state of external processes while electro-mechanical relays can provide direct on-off control of equipment. The 104-16ISO provides 16 optically isolated inputs, the 104-DIO32EM has 16 optically isolated inputs and 16 electro-mechanical relays while the 104-DIO8 has eight optically isolated inputs, eight electro-mechanical relays and eight TTL inputs on the same module.
The 104-AOB4/12 four-channel 12-bit analogue output module provides analogue voltage outputs in the 0V to 5V, 0V to 10V, ±5V and ±10V ranges and is suitable for process control applications.