Specifications for ADB I/O

Functional Features

• Plugs into the Apple Desktop Bus port on the Macintosh.
• 4 ADB I/O units can be connected to one Macintosh.
• No external power supply needed.
• 4 relay outputs.
• The relay outputs have a timer function that can be optionally set to, 0 to 25.5 seconds.
• 4 data acquisition channels. Each channel can be configured as an analog input (8 bits resolution), a digital input or a digital output.
• Maximum sample rate: 90 samples per second.
  4 channels per sample. Max 12 samples per second recommended for smooth simultaneous mouse operation.

Contents

• One ADB I/O
• One Apple Desktop Bus cable
  Not included at the new low price
• Manual
• Software on 1.4Mb floppy disk
  • Easy to use utility applications
  • XCMDs for HyperCard
  • Director ADB I/O XCMD example
  • Scripting Addition for AppleScript or other Open Scripting Architecture applications.
  • 4th Dimension Externals
  • C Interfaces

Unit Size

• Height: 29 mm ( 1.14 inch )
• Width: 122 mm ( 4.80 inch )
• Depth: 65 mm ( 2.56 inch )

Requirements

• Macintosh with Apple Desktop Bus.
• System 7.0 or later.

Electrical Features

• The ADB I/O unit is powered from the Apple Desktop Bus and thus need no other power supply.
  
• The Desktop Bus is protected against short circuit and over voltages.
  
• The power consumption is less than 100mA.
• ADB I/O port A
  • This port has 4 digital input/output channels. They are each connected to a "make contact" Reed-relay, which are connected to a pair of screw terminals.
  • The relays are mounted in sockets for easy exchange to "break-contact" reed-relays if that is desired.
  • The reed-relays can switch 0.5A, 100V DC, max 10VA.
  • Each socket can also accommodate a standard opto-coupler IC, making the channel an isolated input.
• ADB I/O port B
  • This port has 4 input/output channels. They are configurable as either 4 analog 0-5V inputs, 3 analog inputs and a 3-5V reference input, 2 analog 0-5V inputs and 2 digital inputs/outputs, or finally 4 digital inputs/outputs.
  • Each channel has a user selectable pull-up or pull-down resistor for easy interfacing to digital sensors and switches.
  • The channels are protected against over voltages by surge protection diodes.

Connectors

• 2 Apple Desktop Bus Connectors
• Port A: 4 screw terminal pairs. (relay contacts)
• Port B: 4 screw terminal pairs. (channel and ground)
• +5V reference voltage: 1 screw terminal pair.