gtIOBoard1
Well the blank boards are at the PCB manufacturer as of today (22nd Nov) and are now being made, hopefully they will be back here ready for assembly before the end of November.
Connectors
- 4 opto isolated digital inputs
- 4 single pole change over relay contacts
- 2 analog (voltage) inputs.
- RS232 (DB9F) port for PC communications
- DC power connector for 9 to 12V DC plugpack/wallwart
4 opto isolated digital inputs
The optically isolated digital inputs can be configured to act as simple digital inputs or as counters. Input voltage range can be from 5V DC up to about 18V DC for a standard board. For higher input voltages a simple resistor may be added in series with the input signal. In addition if you wish to detect an AC voltage, a circuit consisting of a diode and capacitor can be added to the input leads. Once again if you require to detect AC voltages higher than 5 to 18V then a resistor needs to be added as well.
4 relay outputs
There are four seperate relay contacts that are capable of switching low voltage AC or DC at up to about 0.5 amps. If you require to be able to switch larger voltages or loads you can use these relay contacts to control a much larger relay. Please note that you should be licenced or have appropriate qualifications and experience for working on voltages above 24 volts or you might injure or kill yourself or someone else. Please be warned that high voltages can and do kill so please seek help or assistance from someone qualified.
2 analog voltage inputs
There are two seperate analog inputs that are capable of measuring voltages up to about 25 volts DC. This voltage range can be changed to read higher voltages by adding an additional resistor in series with your voltage signal, or to measure lower voltages with higher resolution there are several resistors located on the circuit board that can be removed (by unsoldering) and changed to different values. (More detailed information on these values will be provided when the product is released).
RS232 port
A standard 9 pin D-Sub connector is provided on the board for connection to your computer for control of the gtIOBoard. A standard RS232 serial cable is required to connect the gtIOBoard to your computer. This cable is typically a D9 female to D9 male cable unless your PC has a 25 pin serial port.
DC power connector
A dc power supply is required to power the gtIOBoard and any DC supply with a voltage output in the range of about 6V DC to 15V DC will work ok. The total current required by the gtIOBoard is typically less than 150mA so even a small power supply will be fine. The DC connector on the gtIOBoard takes a standard 2.1mmID / 5.5mmOD DC type power plug which is also one of the most common DC power connectors.