Kramer EXT3-C-XR-TR User Manual page 48

3. Click OK. The Digital Output options appear.
4. Select one of the following for the Pull-up resistor setting:
▪
Pullup resistor set to Enabled:
The port can be used for controlling devices that accept a TTL signal such as for
powering LEDs. The voltage output is TTL positive logic: high: >2.4V; low: < 0.5V.
When the pull-up resistor is enabled, the port state is high. For the state to be low, you
must select Low for the Current Status.
▪
Pullup resistor Disabled:
The port is used for controlling external devices such as room or light switches. The
external source device determines the voltage output; the maximum voltage is 30V DC
and the maximum current is 100mA.
When the pull-up resistor is disabled, the port state is low. For the state to be high,
select High for the Current Status.
Make sure that the current in this configuration does not exceed 100mA.
5. Click SAVE.
Digital Output I/O type is configured.
EXT3-21-XR-TR – Using Embedded Web Pages
Figure 38: GPIO Settings Page – Digital Output I/O Type
Kramer Electronics Ltd.
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