Service USB classic has eight digital inputs, eight digital outputs and two analogue inputs. The interface is connected to the USB connection of the Macintosh whereby the more then 100 Service USB can be operated simultaneously.
Service USB classic is supplied with power from the USB-Bus. An external power pack is only required to operate the digital power outputs.
The digital inputs are operated with TTL levels (0V/5V). The two analogue inputs operate in the range of 0 to 200k Ohm or 0 to 5V with an entry resistance of 2k Ohm. The resolution is 8 bit with an error rate of 3LSB. The outputs operate in the range of 7-15V with a maximum of ± 200mA. They switch to zero volt or + supply voltage (full bridge operation).
All inputs are secured with a resistance network and damping diodes against overvoltage and undervoltage up to ± 15V. The outputs are short-circuit-proof to ground, temperature protected and also suitable for inductive loads (motors).
Twenty-six LEDs constantly display the states of the inputs and outputs as well as further operating parameters.
Directly triggerable via AppleScript, Runtime Revolution, RealBasic, Macromedia-Director, 4th Dimension and Codewarrior under MacOS 8 & 9. and OS X. FileMaker, Ragtime and other programs via AppleScript.