Description
Use
The KS-Ad signal column is the alarm device designed for using in automatics systems, systems of machine operation state signalling or warning systems.
Signal columns (acoustic-optical alarm devices)
The signal column is used because of necessity of using signalling devices in the machine structure, it results from the concern for the staff’s health and life as well as it is prescribed:
- Machine directive 2006/42/WE published on June 09, 2006,
- EN 981:1996+A1:2008 System of audible and visual distress signals and communication signals,
- EN 842:1996+A1:2008 Visual distress signals. General requirements, designing and testing,
- EN 61310-1:2008 Machine safety. Indicating, marking and controlling. Part 1: Requirements concerning visual, acoustic and tactual signals.
- Detailed rules for the use of safety signs and signals, OJ of June 28, 2002
According to the new machine directive 2006/42/WE (pt. 1.7.1.2. Warning devices)
In case when people’s health and safety can be at risk because of the defect in operation of the machine left without supervision, the machine has to be equipped with the appropriate audible or optical warning signalling. In case when the machine is equipped with warning devices, signals of these devices have to be unambiguous and easily perceptible. The operator has to have always the possibility of checking the warning device operation. Requirements of community special directives concerning safety colours and signals must be obeyed
Used warning colours as well as audible signals are in accordance with the norms mentioned below.
Field of applications
Regarding its specificity the KS-Ad signal column is mainly designed for signalling the machine operation state, through optical or acoustic and optical signalling. Signal columns find application in the industry, in companies producing machines as the accessories element of newly designed machines, and also among users modifying the machine park. For users modifying the machine park the special advantage of KS-Ad signal column is a simple control method (it is essential when it comes to modernization of old machines, which in most case offer only relay outputs).
Construction
The column is made of non-flammable plastic as well as polycarbonate. Individual segments are integrated permanently, without the possibility of exchanging colours (elements are joined in a factory according to the client’s order). Each column segment (colour) is made of shade with the outer diameter of 75 mm. The light source is the set of LED diodes. There is possibility of receiving five luminous effects (depending on the control signal).
At the column bottom there is an acoustic module (in the version with a sound), which gives the possibility of generating to six acoustic signals (depending on the number of tower segments). The sound source is a piezoceramic transducer, thanks to which it is possible to receive a considerable sound volume.
Additionally, by means of microswitches placed in the tower basis on can make the four-level volume control. The signal tower has got in its basis two terminal blocks, to which it is necessary to connect control signals as well as supply lines. In the basis there is provided a cable clamp. Terminal blocks are disassembling blocks, what gives the possibility of removing the tower from the machine (e.g. for the transport time) without the necessity of disassembling the cabling.
Additional
Control
The KS-Ad signal column through the built-in control system enables generating optical as well as acoustic and optical signals such as:
- fixed light,
- pulsed light 1 Hz, flash time of 0.5 s,
- pulsed light 5 Hz,
- rotating light for all colours except for green,
- irregular light (irregular flash frequency) for all colours except for green (except for the colour 3 counting from the top)
- brightness modulation, only for the green colour,
- in the version without a sound module, the strobe light for the red signal.
SIGNALS CONTROLLING OPERATION OF THE KS-Ad COLUMN
The KS-Ad tower has got the number of inputs dependent on the number of colours as well as the presence of sound module.
COLOUR 1 - controlling input for the red colour (or the first counting from the top of the tower),
COLOUR 2 - controlling input for the yellow colour
COLOUR 3 - controlling input for the green colour
COLOUR 4 - controlling input for the blue colour
COLOUR 5 - controlling input for the white colour
TEST - test input (giving the ground introduces the tower into the testing mode),
BLOCK - input of acoustic signal lockout (when connected to gnd, acoustic signal is locked out),
VCC - supply voltage input +20..30 V DC,
GND - double input of supply voltage ground.
The signal tower has also got microswitches installed in the basis, which have the following functions:
COLOUR 1…COLOUR 5 - selection of the input configuration,
CTRL - selection of the controlling type for inputs: analogue, volt-free or digital,
IL - selection of the option ”Irregular light” – the option of irregular light,
SIGNAL/STR - selection of sound type for the red light, additional optical signal (version without an acoustic module),
VOL 1 – selection of volume degree (four-level control),
VOL 0 – selection of volume degree (four-level control).
METHODS OF CONTROLLING THE KS-Ad SIGNAL TOWER OPERATION
The KS-Ad signal tower offers the user three controlling options:
- analogue (voltage or resistance dialled by means of microswitches COLOUR 1..COLOUR 5)
- volt-free (binary control by means of relay contacts)
- digital control (two-stage)
The selection of control type is made by means of the microswitch CTRL placed in the device basis
In case of analogue control each tower input (COLOUR 1..COLOUR 5) can be controlled independently (e.g. 4 inputs in the voltage way, 1 input in the resistance way). In the voltage mode the voltage given on terminals should be included in the range of 0..10 V DC.
In the volt-free control mode all inputs operate in the two-stage mode: input connected to gnd or left unconnected. The change of control input state can be made e.g. by means of relay contacts.
In case of digital control the user gives signals of two logical levels to the tower input. This controlling is as good as it can be connected with the free-volt control, i.e. some inputs can be controlled in a free-volt way and others – in a digital way.
The control system of the signal tower prevents generating accidental warning signals as a result of incorrect control. In case of appearing a fault (or breakdown) in the system applying control signals to the tower input (e.g. a situation, when the user wants to receive two acoustic signals at the same time) the tower electronic system operates on a priority basis (reproduces the signal of greater importance). It means that e.g. when there is a warning signal and then there appears the danger signal, the tower will reproduce the danger signal.
Additionally, the KS-Ad signal tower has got: the option of switching off the audible signal, a test mode, the option IL (Irregular light), the possibility of selecting the additional sound for the red light as well as in case of the version without an acoustic mode the option of selecting the strobe light for the red colour.
1. Analogue voltage control
This tower control mode is selected by means of the microswitch CTRL put in the position ”ON”, the microswitch COLOUR 1..COLOUR 5 in the position ”OFF”.
In case of voltage control the user applies the voltage signal in the range of 0-10 V DC to terminals of the tower COLOUR 1..COLOUR 5. Depending on the level of the control signal the tower generates appropriate optical as well as audible signals.
2. Analogue resistance control
This tower control mode is selected by means of the microswitch CTRL put in the position ”ON”, the microswitch COLOUR 1 ..COLOUR 5 in the position ”ON”.
In case of resistance control the user connects the given resistance value to terminals of the tower COLOUR 1..COLOUR 5. Depending on this value the tower generates appropriate optical as well as audible signals.
3. Free-volt control
This tower control mode is selected by means of the microswitch CTRL put in the position ”OFF”, microswitches COLOUR 1..COLOUR 5 in the position ”ON”. In this mode tower inputs operate in the free-volt way. Inputs are shorted to ground or they are left unplugged. This control type can be done e.g. by means of relay contacts.
In the free-volt control the compact input to ground means the fixed light generation for the appropriate colour. If it is necessary to generate the pulsed light, the user self-controls the contact, shorting the input to ground in a pulsed way. In case of restricted sequences (e.g. red and green colours simultaneously) the device generates the luminous effect consistent with the table below.
Legend:
Z input connected to ground,
R input left unconnected,
X optional input state (Z or R).
4. Digital control
This tower control mode is selected by means of the microswitch CTRL put in the position ”OFF”, microswitches COLOUR 1..COLOUR 5 in the position ”OFF”. In this mode the user applies two voltage levels (logical) to tower inputs. The level ”0” of the logical one corresponds with the voltage 6..10 V, the level ”1” of the logical one – the voltage of 0..2 V DC.
The application to terminals of the logical tower ”1” causes the fixed light generation for the appropriate COLOUR.
In the case of prohibited sequences, the system generates effects in accordance with the table above, with:
Z Logical “1” on tower input
R Logical “0” on tower input
X optional logical state in the input.
Additional functions of the KS-Ad column
- Switching off an audible sound
When it’s necessary to switch off an acoustic signal quickly the user has the acoustic signal blockade “BLOCK” input at his disposal. Connecting gnd to this input causes immediate switching off the acoustic signal regardless of the input state COLOUR 1..COLOUR 5, whereas in the analogue control mode it’s enough to short connect to gnd, however in case of free-volt as well as digital control it must be a stable state until the moment of appearing the next control signal.
Notice In the analogue mode generating a new (different) acoustic and optical signal eliminates a sound blockade.
This mode is designed for checking operation of the signal tower optical and acoustic systems. Entering the test mode takes place through connecting the supply gnd to the input: ”TEST”, it causes generating the fixed light of all tower colours as well as simultaneous sound generation with the constant frequency (300 Hz). The sound can be switched off by the input of acoustic signal blockade.
Notice During the test the tower does not react to the input state COLOUR1…COLOUR5.
In case of switching on the option of irregular light (microswitch IL placed in the device basis) the rotary light effect is replaced with the irregular light, thanks to which it is more perceptible as a human being is not able to get used to the changing signal.
- Selection of the additional sound for the red light:
There is possibility of selecting one out of two acoustic signals available for the red light by means of the microswitch SIGNAL placed in the device basis.
SIGNAL put in the position 0: serially increased frequency from 400 Hz to 1300 Hz during 1 s,
SIGNAL put in the position 1: serially increased frequency from 2400 Hz to 2850 Hz during 0.14 s.
- Selection of the strobe light for the red colour (only in the version without an acoustic module):
There is possibility of selecting the additional optical effect for the red colour, by means of the microswitch SIGNAL/STR. In case of switching over the microswitch in the position ”ON”, there is chosen the strobe light type. This light is active only for the red colour (or the first colour counting from the top of the tower, in case of nonstandard product).
Notice Exemplary control circuit diagrams are in the bookmark "Download"
