Driver Module - Stulz S-Klima C7000 User Manual

3.5 Driver module

The driver module has the following features:
1. A static bus termination (120 Ohm) that can be activated via a jumper.
2. A circuit to set the bias for the bus: using two jumpers, either a low bias (bus center) or a high bias (bus end)
can be set.
3. Protection against ESD impulses on the data lines
The interference immunity of the bus is increased by the driver module.
When it comes to setting the jumpers, only the two depicted settings are permitted. The jumpers are implemented
blockwise. Other settings lead to unstable bus connections.
12
Participants on the end of the RS485 bus
The picture shows the position of the jumper if the
participant is located at the end of the bus. The
rightmost jumper activates the termination resistor
in the depicted position. The remaining jumpers set
a high bias.
Jumper for activating the termination resistor
Two jumpers for setting the bias on the bus.
Participants in the center of the RS485 bus
The picture shows the position of the jumpers if the
participant is located in the center of the bus.
The rightmost jumper deactivates the termination re-
sistor in the depicted position. The remaining jumpers
set a low bias.
BA C7000 for EC Tower | EN | 01-2019 | 1000755