English (GB)
16
8. Technical data
Transient voltages typically present on the mains
supply are category 2.
8.1 Operating conditions
Altitude above sea level
Maximum 2000 m.
Ambient temperature
During operation, in stock or during transportation:
-20 to +60 °C.
Do not expose the product to direct sunlight.
Relative humidity
Maximum 95 %.
Pollution degree
Internal pollution degree 2.
External pollution degree 3.
8.2 Mechanical data
Enclosure class
To reduce the external pollution level to maximum 2,
install CU 323 in a protecting environment with
minimum IPX4 enclosure according to IEC 60529.
The cabinet must be of a flame-retardant material.
The front of CU 323 is IP54.
USA and Canada
CU 323 is type 3R when mounted in the front of a
cabinet with type rating 1, 2, 3, 3R, 5, 12, 12K or 13.
8.3 Electrical data
8.3.1 Supply voltage
1 x 100-240 VAC ± 10 %, 50/60 Hz, PE.
Class 1 equipment.
8.3.2 Circuit breaker
Installation of circuit breakers must comply with local
and national regulations.
8.3.3 Power consumption
Maximum 12 W without CIM module fitted.
Maximum 18 W with CIM module fitted.
8.3.4 Digital inputs
8.3.5 Analog inputs
8.3.6 Digital outputs (relay outputs)
8.3.7 Inputs for PTC sensor or thermal switch
For PTC sensors to DIN 44082. Thermal switches
can also be connected.
8.3.8 Conductors
8.3.9 Terminals
All terminals are suitable for conductors of 0.5 to 2.5
mm
2
or AWG 20-13.
For further information, see section
8.3.8 Conductors.
To achieve enclosure class IP54, CU 323
must be mounted in the front of an IP54
enclosure so that the back is protected
inside the enclosure. See fig. 10.
Open-circuit voltage 24 VDC
Closed-circuit current 5 mA, DC
Frequency range 0-4 Hz
Input current and voltage
0-20 mA
4-20 mA
0-10 V
Tolerance ± 3.3 % of full scale
Repetitive accuracy ± 1 % of full scale
Input resistance, current Below 250 Ω
Input resistance, voltage 10 kΩ ± 10 %
Supply to sensor
24 V, maximum 30 mA
per sensor,
short-circuit-protected
Normally open contacts,
DO1, DO2 and DO3
C, NO
Normally closed contacts,
RO1 and RO2
C, NC, NO
Maximum contact load 240 VAC, 2 A
Minimum contact load 5 VDC, 10 mA
Open-circuit voltage 8 VDC ± 15 %
Closed-circuit current 1.7 mA, DC
Rigid conductors
0.5 - 2.5 mm
2
20-13 AWG (US)
Flexible conductors
without ferrule
Flexible conductors with
ferrule
With or without plastic
collar
0.5 - 1.5 mm
2
20-13 AWG (US)
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