Electrical Connection - IFM Electronic AS-i Bedienungsanleitung

Electrical connection

Disconnect power. Connect the unit according to the terminal
marking. Never connect the minus potentials to each other or
the minus potentials and the PE connection.
Ensure an electrically safe ground connection between the AS-i
controller (PE terminal) and the ground connection of the unit.
The RS485 cable must be operated with a terminating resistor at
both ends because the cable driver is switched with a high-
ohmic value in the quiescent condition and in case of a high sig-
nal.
Cables A and B are connected via a 120Ω resistor. Cable A is
connected to +5V via 330Ω and cable B to OV via 330Ω.
These resistors are already integrated in the AS-i controller. They
can be activated via links between pins 5-9, 8-7 and 1-6 in the
terminating plug.
After application of the supply voltage all the LEDs and the LED display
are switched on (LED test); then the version numbers of the hardware
and the software are displayed for 1s each (software version controller
and software version AS-i master).
15
PAGE