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WARNING
!
This device is only suitable for operation with 24 V DC voltage (safety extra-low voltage). Direct connection of these devices to the
110 V / 230 V / 400 V power system, or to a power system with a higher voltage, may consequently result in death, severe
personal injury or substantial property damage. Only qualified personnel should work on or around this equipment. The product
will function correctly and safely only if it is transported, stored, set up and installed as intended.
IMPORTANT
Only specially trained personnel are allowed to open the equipment. Electrostatic sensitive devices (ESD)
Functional description
SITOP select is a built-in electronic diagnostic module. It must be installed taking into account all relevant DIN/VDE specifications and other
national standards. SITOP select is designed to be connected to stabilized 24 V DC power supplies with an output current of 5 A to 40 A.
SITOP select allows the 24 V DC output voltage generated by a stabilized power supply to be split between several load circuits and the current
monitored separately for each load circuit. The rated current of each load circuit can be set with a potentiometer (1) between 2 A and 10 A.
!
Note: It is not permitted to connect several outputs (6) in parallel in order to increase the power.
Each channel is monitored to determine whether its individual rated current is exceeded (green LED (3), signaling contact (4) closed). If the
disconnection conditions are fulfilled, in other words if overloading occurs, the output concerned is disconnected (red LED, signaling contact open
= normal position). After approximately 20 s (red blinking LED), the disconnected output can be acknowledged and reset by pressing the RESET
button (5).
The diagnostic module is equipped with one externally accessible FK2 blade-type fuse (2) per channel, the purpose of which is to protect the line.
The module is delivered with 15 A FK2 blade-type fuses for connecting line cross-sections larger than 2.5 mm². If smaller line cross-sections
need to be connected, the fuse concerned must be replaced by one with a lower rated current (refer to safety/selection table). The user is
responsible for ensuring that the line cross-sections at the outputs of the diagnostic module are suitable for the fuses that are fitted.
!
Note: In order to prevent damage to the device caused by overvoltage, drawing the FK2 blade-type fuse under load is only allowed if
connected inductive electric consumers are protected by a free-wheeling arm (free-wheeling diode)!
Technical data
Input variables
Rated input voltage:
24 V DC
Working voltage range:
22 to 30 V DC
Connection threshold:
Approx. 12 V
Max. input current:
40 A
Output variables
Rated output voltage:
24 V DC, equivalent to input voltage
Typical voltage drop with 10 A per branch:
300 mV
Branch current setting range:
2 to 10 A, set with potentiometer
Parallel connection of several branches in
order to increase the power is not permitted.
Typical current for disconnected and short-
circuited output:
20 mA
Weight
0.4 kg
Siemens AG Österreich
Ambient
Temperature
Storage and transport:
Operation:
Humidity rating:
Corresponds to climatic category 3K3 acc. to
EN 60721, Part 3, no condensation
Natural air cooling
Signaling
Green LED:
Output through-connected
Red LED:
Output disconnected owing to overcurrent
Red blinking LED:
Overcurrent disconnection can be reset by pressing
the RESET button
Common signaling contact:
Floating relay contact
Signal contact opens (= normal position) if one or
more outputs are disconnected because of
overloading or if a fuse fails
Contact rating: 24 V / 0.5 A
SITOP select
Seite 5 von 7
Safety
Standard fuses:
-25 to +85° C
15 A FK2 blade-type fuses (= max. permitted value)
0 to +60° C
Manufacturer: e.g. Wickmann, FK2 series, 19 mm long
(Website: www.wickmann.com)
Lower values can be selected if necessary, depending on
the potentiometer setting. Selection table :
Max. setting
2 A
3 A
4 A
6 A
8 A
10 A
Specifications
Degree of protection: IP20 acc. to EN 60529
Safety class: III acc. to IEC 536
Safety acc. to EN 50178 and EN 60950: SELV
Emitted interference: acc. to EN 50081-1,
radio interference suppression acc. to EN 55022,
limit curve B
Noise immunity: acc. to EN 50082-2, incl. Table A4
UL 508, File E197259, Vol.1, Sec.2
UL 60950, File E151273, Vol.1, Sec.11
Bestell-Nr.: C98130-A7524-A1-03-7419
English
Min. fuse
3 A
4 A
5 A
7.5 A
10 A
15 A
Printed in Austria
BA 11.03
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