liability for possible errors. We always appreciate your suggestions for improvement, corrections,
comments and proposals. Please contact us: editing@siebert-group.com
Siebert®, LRD® and XC-Board® are registered trademarks of Siebert Industrieelektronik GmbH. All
other product names mentioned herein may be trademarks or registered trademarks of their respective
owners.
We reserve the right to make alterations to the technical data and delivery options without notice. - All
rights reserved, including the rights of translation. No part of this document may in any form or by any
means (print, photocopy, microfilm or any other process) be reproduced or by using electronic
systems be processed, copied or distributed without our written permission.
Important information ......................................................................................................................................... 5
Intended use ....................................................................................................................................................... 5
Mounting and installation .................................................................................................................................... 5
Model designation .............................................................................................................................................. 7
Unit construction ................................................................................................................................................. 7
Power supply ...................................................................................................................................................... 7
Unit properties .................................................................................................................................................. 11
Max. power consumption ................................................................................................................................. 12
Front frame ....................................................................................................................................................... 13
Measurements and weights ............................................................................................................................. 14
Information intended to help you to avoid death, bodily harm or considerable damage to
property is highlighted by the warning triangle shown here; it is imperative that this
information be properly heeded.
Components inside the units are energized with electricity during operation. For this reason,
mounting and maintenance work may only be performed by professionally-trained personnel
while observing the corresponding safety regulations.
The user must ensure that the attachment hardware, the unit carrier and the anchoring at the
unit carrier are sufficient to securely support the unit under the given surrounding conditions.
When the housing fasteners are opened, the front frame of the housing hinges out upward or
downward (depending on the unit version) automatically.
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3 Safety precautions
Important information
Read these operating instructions before starting the unit. They provide you with important information
on the use, safety and maintenance of the units. This helps you to protect yourself and prevent
damage to the unit.
The operating instructions are intended for trained professional electricians familiar with the safety
standards of electrical technology and industrial electronics.
Store these operating instructions in an appropriate place.
The manufacturer is not liable if the information in these operating instructions is not complied with.
Safety
The repair and replacement of components and modules may only be carried out by the manufacturer
for safety reasons and due to the required compliance with the documented unit properties.
The units do not have a power switch. They are operative as soon as the operating voltage is applied.
Intended use
The units are intended for use in industrial environments. They may only be operated within the limit
values stipulated by the technical data.
When configuring, installing, maintaining and testing the units, the safety and accident-prevention
regulations relevant to use in each individual case must be complied with.
Trouble-free, safe operation of the units requires proper transport, storage, installation, mounting and
careful operation and maintenance of the units.
Mounting and installation
The attachment options for the units were conceived in such a way as to ensure safe, reliable
mounting.
The units are to be mounted in such a way that they can be opened up while mounted. Sufficient
space for the cables must be available in the unit near the cable entries.
Sufficient space is to be kept clear around the units to ensure air circulation and to prevent the buildup of heat resulting from use. The relevant information must be heeded in the case of units ventilated
by other means.
Grounding
All devices are equipped with a metal housing. They comply with safety class I and require a
protective earth connection. The connecting cable for the operating voltage must contain a protective
earth wire of a sufficient cross section (DIN VDE 0106 part 1, DIN VDE 0411 part 1).
BAL S302 FRQ 4.00 5/17
① mounting plate
② conductive clamp
③ data lines
④ cable shielding
EMC measures
The devices comply with the EU Directive 2004/108/EC (EMC Directive) and provide the required
interference immunity. Observe the following when connecting the operating voltage and data cables:
Use shielded data cables.
The data and operating voltage cables must be laid separately. They may not be laid together with
heavy-current cables or other interference-producing cables.
The cable thickness must be properly assessed (DIN VDE 0100 Part 540).
The cable lengths inside the units are to be kept as short as possible to prevent interference. This
applies especially to unshielded operating voltage cables. Shielded cables are also to be kept short
due to any interference which might be emitted by the shielding.
Neither excessively long cables nor cable loops may be placed inside the units.
The connection of the cable shielding to the functional ground (PE) must be as short and low-
impedance as possible. It should be made directly to the mounting plate over a large area with a
conductive clip:
The cable shielding is to be connected at both cable ends. If equipotential bonding currents are
expected due to the cable arrangement, electrical isolation is to be performed on one side. In this
case, capacitive connection (approx. 0.1μF/600 V AC) of the shielding on the isolated side must occur.
Disposal
Units or unit parts which are no longer needed are to be disposed of in accordance with the
regulations in effect in your country.
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4 Unit description
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Model designation
This manual applies to units with the following model designation (x = the 'x's in the model designation
indicate the size and design of the units (see Chapter 8):
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Unit construction
The following figure shows model type S302-05/10/xx-xxx/xx-xx as example for the other model types.
The front frame of the housing is locked with quick-action releases. When opening the unit the front
frame hinges downward.
The following figure shows the unit when open.
S302-xx/xx/xx-xxx/xx-Z2 (opto-coupler input, frequency measurement)
Units with double-sided display show the same information on the front and on the rear side.
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Power supply
The screw-type terminals for the power supply are located on the power supply unit in the bottom
section of the housing. They have the following designations:
Devices for a power supply 115 V AC or 230 V AC L, N and PE
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5 Control
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Pin assignment
The following figure shows the printed circuit board with the two terminals to which the pulse generator
is connected to. The terms HI (white cable) and Lo (brown cable) are found in Chapter Notes.
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Galvanic isolation
The input circuit consits of an opto-coupler for galvanic isolation. As dropping resistor 1,0 kilohm kΩ is
used.
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Electrical properties
The input has the following properties:
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Update rate
To measure with the display at very low frequencies with sufficient accuracy a long measurement
interval is required. This results in a low update rate. This would be disruptive at high input
frequencies.
By an adaptive measuring procedure it is achieved that the display updates itself as fast as possible.
If the frequency at the input fell below the lower limit, the display mode switches to the value 0 after a
few seconds. If still no frequency is recognized the display switches to a mode in which only the
decimal points with varying brightness light up.
BAL S302 FRQ 4.00 8/17
Frequency range
Course of updating
>200 Hz
Last valid value
1Hz…200 Hz
Once every second
0,01 Hz…1Hz
With the next edge of the input signal
<0,01 Hz
1. Display remains on its value
2. After a few seconds it is switched to 0
3. After a few minutes the points are shown in varying intensity
The power consumption for the device model S302-xx/xx/0x-xxx/xx-xx is also valid for the device
model S302-xx/xx/2x-xxx/xx-xx (LEDs for external use).
BAL S302 FRQ 4.00 12/17
For units with built-in heating, the values for power consumption specified in the table increase by
approx. 10 – 100 VA (exact values on request), depending on the unit size).