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The Black Box Toolkit Page 97 of 98

3.5mm stereo jack socket. Connection as detailed below:

• Tip: 5V (< 50mA)

• Ring: TTL signal

• Screen: 0V

The tone generator modules can be connected to these lines.

13.3.4. Lines 7 & 8, Active switch closure

The 2.5mm mono sockets connect to the switch contacts of a solid-state relay. The

maximum ratings for which are:

• Load voltage (peak AC): 50V

• Continuous load current: 0.13A

• Peak load current: 0.4A (100mS, 1 shot, DC)

• On resistance: 18 Ω

The connections from the active switch closure lines can be connected in parallel with

device buttons (eg. Joysticks, mice, etc.) to emulate the pressing of the button. The unit is

supplied with 2 flying leads with 2.5mm connectors for this purpose.

NOTE: Exercise caution when connecting the flying leads from the ‘active switch closure’

not to connect the two leads across the power supply of the device you’re measuring!

• 2.5mm mono jack socket.

• Tip:Solid-state relay contacts

• Screen:Solid-state relay contacts

13.4.. Power supply

The power adaptor for the unit needs to supply between 7.5 and 9V with a power rating of

at least 250mA. The connector for the supply is a 2.1mm low power connector where the

centre pin is 5V and the outer being ground (0V).

The UK version is supplied with a suitable power adaptor with a multi plug connector. The

larger (2.1mm) connector is the one to use.

13.3.5. Optional response box

The response box comes supplied with an 8 way cable with flying leads. These can be

connected to external peripherals as described in the ‘active switch closure’ section. The

flying leads are connected in pairs to solid-state relays within the response box, the wiring

is described in the table below:

Colour wires lines

Green – Yellow 5

Orange – Red 6

Brown – Blue 7

Purple – Grey 8

1 2 ... 92 93 94 95 96 97 98

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Black Box IEEE 1284 Guía de usuario Pagina 97