Siemens SIPART DR22 Manual page 146

2 Installation
2.2 Electrical Connection
!
D Power Supply Connection
The power supply is connected on 115 V or 230 V AC systems by a three--pin plug IEC
320/V DIN 49457 A , on 24 V UC systems by a special 2--pin plug (polarity irrelevant). The
plugs are supplied with the unit.
!
D Connection of measuring and signal lines
The process signals are connected via plug-in terminal blocks that can accommodate cables
2
of up to 1.5 mm (AWG 14) cross-section.
Standard controller
Option modules
Interface relays
The slots 1 to 8 must be marked in the circuit diagrams and at the terminal blocks.
Signal lines should be laid separately from power cables to avoid the risk of interference
couplings. If this is not possible, or -- due to the type of installation -- the controller may not
function properly as a result of interference on the signal lines, the signal lines must be
shielded. The shield must be connected to the PE conductor of the controller or one of the
ground connections, depending on the fault source's reference junction terminal. The shield
should only ever be connected to one side of the controller when it is connected to the PE
conductor to prevent creation of a ground loop.
144
WARNING
Disconnection of the PE conductor while the controller is powered up
can make the controller potentially dangerous. Disconnection of the PE
conductor is prohibited.
WARNING
Set the mains voltage selection switch (see figure 2-1) in the no--voltage
state to the existing mains voltage.
It is essential to observe the mains voltage specified on the rating plate
or on the mains voltage switch (115/230 V AC) or on the voltage plate
(24 V DC)!
Feed the power cables via a circuit breaker within easy reach (fire safety
according to IEC 66E (sec) 22/DIN VDE 0411 Part 100). When
connected to an unprotected power supply, the controller must be
supplied via a circuit breaker. The circuit breaker is not required if one
already exists (≤ 30 Vrms or ≤ 42,4 V DC and current ≤ 8 A or source
under all load conditions ≤ 150 VA or fuse element which responds at
≤ 150VA).
The circuit breaker can be omitted if the 24 V UC power supply is
protected by ≤ 4 A (35 V DC) (T 3,15 A is required at least).
Slot 1
Slots 2 and 3
Slot 5 and 6
"Slots" 7 and 8
14- and 10-pin
4-pin
5- and 6-pin
3- and 6-pin
SIPART DR22 6DR2210
C79000-G7476-C154-03
Manual