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7. General Information
The DSU 2U signal converter is a component of the Dupline installation system and is
able to convert two voltage signals for transmission on the Dupline bus.
The inputs are each suitable for DC voltage from 20 V to 300 V or AC voltages from 20 V
to 250 V at 50 Hz. They can be operated simultaneously. There is no need to observe a
specific polarity.
With proper installation, and using only one type of voltage for both channels, the device
complies with the regulations for protective low voltage between mains and control cir-
cuit.
As it is supplied by the Dupline bus, it can be fitted in a convenient local position, e.g. in
switch socket boxes or cavities.
The green LED on the front indicates the proper functioning of the Dupline bus.
8. Coding
With the DHK 1 hand encoder each channel can be assigned any address between A1
and P8 via the flat-plug connector on the front of the DSU 2U. The allocation of the chan-
nels is as follows:
Channel
1
Input Signal 1
2
Input Signal 2
3
Not assigned
4
Not assigned
Functions which are not required should remain uncoded. Encoding the DSU 2U requi-
res neither a power supply nor the Dupline signal. Although the coding is permanently
retained, it may always be overwritten.
9. Putting into Service
Installation may only be carried out by an authorized technician. Observe the connection
diagram when installing. All leads to be connected must be dead.
In order to avoid malfunctions, the length of leads at the input side should not exceed
50 m with AC voltage, and 100 m with DC voltage.
Because of rectification at the input side, there is no need to check for correct polarity.
The terminal board is provided with double connection points for the Dupline signal con-
ductors. These are interconnected and can be used for through-looping of the Dupline
signal.
The following table illustrates the connection configuration:
Terminal
D+
Dupline signal conductor + (Dupline+)
D+
Dupline signal conductor + (Dupline+)
Operating Instructions
Dupline DSU 2U Signal Converter
Description
Description
3931196/04/08/E
Channel
5
Not assigned
6
Not assigned
7
Not assigned
8
Not assigned
Terminal
Black
Black
Description
Description
Input Signal 1 (E1)
Input Signal 1 (E1)
5