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4. External connections
To connect the control signals use twisted or screened control lines. If
the controller is being used in UL conditions then only 60°C or 75°C
copper wires are to be used for the power connections in accordance
with the instructions in the technical data.
4.1 Power supply for Thyro-S
The connection of the power supply is to be made in accordance with
the connection diagrams and TECHNICAL DATA.
4.2 Power supply for control electronics
The control electronics are usually supplied directly from the power
connections. Connections U1 and X1.1 are needed for this.
This voltage (mains voltage) is used simultaneously for mains syn-
chronisation. With device types H RL 1 a 24V supply can be con-
nected additionally (AC or DC). This is advantageous if, for example,
you are using a bus system. With device types H 1 the mains voltage
must be in the range of -57% to +10% from the type value; with de-
vice types H RL 1 in the range of -15% to +10%. If the mains voltage
here is smaller than -15% then with these types the additional 24V
supply is needed. The permitted frequency range of the mains vol-
tage is between 47Hz and 63Hz. If the Thyro-S is operated between
two phases, so if a phase is available at X1.1, then an additional fuse
must be installed (see attached connection diagram on page79/81).
The connections X1.1 and X1.2 are bridged internally
4.3 Additional control voltage input
The thyristor switch Thyro-S 1S H RL1 is equipped with an additional
24V AC/DC power supply input. [X1: 1.2 1.5 mm
e.g. when operating with a bus, or voltages below the tolerance (e.g.
with undervoltage of a 440V mains with a 500V Thyro-S) the control
device can be supplied additionally with 24V AC or DC. The 24V vol-
tage must be unearthed (SELV) and must not be connected to the
control earth. However, several Thyro-S switches can be operated on
a 24V supply. The input is reverse polarity protected. The connection
output for the control device is circa 2W (5VA) per actuator.
The 24V connection lines are to be fused in accordance with the ap-
plicable regulations. A soldered in fuse protects the device in case of
internal short-circuits.
, grid 3.5]. If needed,
2
68
4.4 Digital set point input
The digital set point input X22.1 works with a logic signal. It can, for
example, be gated by 24V DC. If a voltage of more than 3V is availa-
ble at this input then the Thyro-S is switched on; below 3V it is swit-
ched off. Between terminals X22.1 (input) and X22.2 (+15V) a switch
or relay contact, for example, can be operated. If a voltage is applied
directly to X22.1 (+) then its reference point must be connected to
X22.3 (earth).
All control terminals are connectable with up to 1.5 mm
3.5mm grid.
2
and have a
69
EN
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