6
7.2 Contrast setting
The contrast can be directly changed by simultaneously pressing the right button
and the
▲
button (too bright) or the
▼
button (too dark).
D
D
ifm electronic
MENU
AS-i DP Gateway
1
D
D
ifm electronic
MENU
AS-i DP Gateway
2
1: increase contrast
2: decrease contrast
8 Operation
To operate an AS-i system a special AS-i power supply is required (e.g. AC1216).
The AS-i power supply supplies the yellow AS-i cable with energy and implements
a data decoupling to the voltage regulator of the power supply. Standard switched-
mode power supplies would consider the AS-i data signals as interference signals
and suppress them.
Disconnect the power supply before connecting the AS-i DP gateway.
The AS-i system is operated ungrounded. AS-i + and AS-i - are to be
symmetrical to the ground potential of the installation. Ensure a low-
resistance connection of the symmetry point of the AS-i power supply
(terminal "shield") to the ground of the installation.
