Kramer Electronics WP-501 - Manual (Page 72)

K-Config – Assigning the Peripheral Devices to Master and Auxiliary Device Ports 67
7.2 Setting the Functionality of the GPI/O Port
The GPI/O (General Purpose Input/Output) port functionality can be defined in the Port Manager as follows:

Analog Input, Digital Input and Digital Output

With or without the internal pull-up resistor
In the K- Config software this term is referred to as Pullup (as opposed to “pull-up”)

Threshold setup
Note that only the GPI/O ports on the Master RC can be activated. The GPI/O Ports on the auxiliary device
do not appear in the port manager.
Figure 111 shows the RC-74DL GPI/O ports in the Port Manager:
Figure 111: Port Manager – Master RC GPI/O ports
To set GPI/O, do the following:
1. Select the Master RC that includes the GPI/O feature (for example, RC-74DL which has two GPI/O ports).
2. Select the Port Manager window.
3. In the GPI/O.1 port, set the functionality of the port and name the port in the description box (for example,
Temperature High for Digital Input, see Figure 112 ).
You have to set the port functionality before you add commands to action lists.
Figure 112: Port Manager – Selecting Digital Input for a Temperature Sensor
4. Select one of the options described in the following sections.
7.2.1 Digital Input
Digital Input reads the digital input of an external sensor device that is connected to the GPI/O port, and can be
defined:

With Pullup: the system can detect either a short circuit (activating the Hi to Lo trigger – closed circuit) or no short
(activating the Lo to Hi trigger – open circuit) using the internal pull-up resistor. The threshold levels are not
relevant in this case and will be automatically adjusted and locked to their appropriate levels
For example, an alarm closing a circuit that activates a series of actions

Without Pullup: the system detects the voltage levels and translates them to High or Low according to the user
defined threshold levels.
For example, a high temperature alarm that exceeds the maximum voltage threshold
i