Name: Linx 7900
Brand: Linx
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Page 6 of 33 FA69388–2 English

Jun 2013

How To Use the Parallel I/O Option

Linx 5900 & 7900

2.4.1 Configure a keypad

You can use the PIO option to connect a keypad. The keypad uses some or all of the inputs

and outputs. The following example shows a keypad that is connected to some inputs (A)

and some outputs (B). The keypad in this example uses three inputs (1 to 3) and four

outputs (1 to 4).

Figure 4. Keypad connections and key numbers

This arrangement provides 3 x 4 = 12 keys.

You must assign a continuous range of inputs and a continuous range of outputs (for

example, inputs 1 to 4, or outputs 3 to 6). You cannot assign an input or output range that is

not continuous (for example, outputs 1 and 3).

NOTE: If you connect a keypad, enter the keypad information before you configure the

inputs and outputs.

Refer to ‘Link positions’ on page 29 and make sure that you set the following links on the

PIO PCB before the PCB is installed:

LK2: Position A (selects the internal 0 volts connection for the inputs)

LK3: Position A (selects the internal 24 volts connection for the inputs)

LK4: Position A (selects the internal 24 volts connection for the outputs)

LK5: Position A (selects the internal 0 volts connection for the outputs)

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Linx 7900 How To Use

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