Reer ADMIRAL AX BK Quick start guide

Dichiarazione CE di conformità
EC declaration of conformity
Torino, 1/1/2010
REER SpA
via Carcano 32
10153 – Torino
Italy
dichiara che le barriere fotoelettriche ADMIRAL sono Dispositivi Elettrosensibili di Sicurezza (ESPE) di :
Tipo 4 (secondo la Norma CEI EN 61496-1:2005; CEI EN 61496-2:2007)
SIL 3 (secondo la Norma CEI EN 61508:2002)
SILCL 3 (secondo la Norma CEI EN 62061:2005 + CEI EN 62061/EC2:2008)
PL e (secondo la Norma UNI EN ISO 13849-1:2008)
declares that the ADMIRAL photoelectric safety barriers are :
Type 4 (according the Standard IEC 61496-1:2004; IEC 61496-2:2006)
SIL 3 (according the Standard IEC 61508:1998)
SILCL 3 (according the Standard IEC 62061:2005)
PL e (according the Standard ISO 13849-1:2006)
Electro-sensitive Protective Equipments (ESPE)
realizzati in conformità alle seguenti Direttive Europee:
complying with the following European Directives:
2006/42/CE "Direttiva Macchine"
"Machine Directive"
2004/108/CE "Direttiva Compatibilità Elettromagnetica"
"Electromagnetic Compatibility Directive"
2006/95/CE "Direttiva Bassa Tensione"
"Low Voltage Directive"
e sono identiche all'esemplare esaminato ed approvato con esame di tipo CE da:
and are identical to the specimen examined and approved with a CE - type approval by:
TÜV SÜD Rail GmbH – Ridlerstrasse 65 – D-80339 – Muenchen – Germany
Carlo Pautasso Giancarlo Scaravelli
DirettoreTecnico Presidente
Technical Director President

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PHOTOELECTRIC
SAFETY
BARRIER
ADMIRAL AX BK
INSTALLATION USE AND MAINTENANCE
INDICE
INTRODUCTION..................................................................................................................... 2
OPERATION............................................................................................................................ 3
INSTALLATION....................................................................................................................... 4
POSITION..................................................................................................................................... 5
MASTER/SLAVE POSITIONING.................................................................................................. 6
SAFETY DISTANCE CALCULATION........................................................................................... 7
VERTICAL POSITION OF THE BARRIER................................................................................... 8
HORIZONTAL POSITION OF THE BARRIER ............................................................................. 9
ELECTRICAL CONNECTIONS.................................................................................................. 10
EMITTER CONNECTIONS......................................................................................................... 11
RECEIVER CONNECTIONS...................................................................................................... 11
WARNINGS REGARDING THE CONNECTION CABLES......................................................... 12
BLANKING FUNCTION .............................................................................................................. 13
CONFIGURATION OF THE TYPE OF BLANKING.................................................................... 18
MULTIPLE SYSTEMS ................................................................................................................25
USE OF DEFLECTION MIRRORS............................................................................................. 26
DISTANCE BETWEEN REFLECTING SURFACES .................................................................. 27
MECHANICAL ASSEMBLY AND OPTICAL ALIGNMENT......................................................... 28
OPERATION AND TECHNICAL DATA................................................................................. 29
SIGNALS..................................................................................................................................... 29
TEST FUNCTION ....................................................................................................................... 31
OUTPUT STATUS...................................................................................................................... 31
TECHNICAL SPECIFICATIONS................................................................................................. 32
DIMENSIONS........................................................................................................................ 33
CHECKOUTS AND MAINTENANCE.......................................................................................... 34
TROUBLESHOOTING................................................................................................................ 36
SPARE PARTS...................................................................................................................... 39
GUARANTEE ........................................................................................................................ 40

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This symbol stands by a very important warning concerning the safety of persons.
Its non-observance can cause a very serious risk for the exposed personnel.
INTRODUCTION
The ADMIRAL AX BK photoelectric barrier is a multi-beam optoelectronic safety system. It
belongs to the family of Type 4 electrosensitive devices for the protection of personnel
exposed to risks arising from the use of hazardous machinery or plant, according to
standards IEC 61496-1,2 and EN 61496-1.
ADMIRAL AX BK is available in two different versions :
The ADMIRAL AX BK is a type 4 light curtain, consisting of an Emitter plus Receiver, that
integrates the floating blanking function.
The ADMIRAL AX BK is also available in a Master-Slave configuration.
A diagnostic display available on Emitter and Receiver provides the necessary information
for a correct use of the device and the evaluation of the possible operation defects.
ADMIRAL AX BK is ideal for the protection of :
Bending presses, presses, die cutting machines, punching machines, cutting and shearing
machines, assembly lines, palletization lines, etc.
If necessary, for any safety-related problems contact the competent safety
authorities or industrial associations in the country of use.
For applications in the food industry, please contact the manufacturer to ensure that
the barrier contains materials that are compatible with the chemical agents utilized.
The protective function of the optoelectronic devices is not effective in the following cases:
If the machine stopping control cannot be actuated electrically and it is not possible
to stop all dangerous machine movements immediately and at any time during the
operating cycle.
If the machine generates dangerous situations due to material being expelled or
falling from overhead.

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OPERATION
If the protected area is clear, the two outputs on the Receiver are active and enable the
machine to which they are connected to operate normally.
Each time that an object bigger than or equal in size to the resolution of the system
intercepts the optical path of one or more beams, the Receiver deactivates the outputs.
This condition enables hazardous machine movements to be stopped (by means of an
adequate machine emergency stop circuit).
The resolution is the minimum dimensions that an object must have so that, on
crossing the protected area, it will certainly intercept at least one of the optical
beams generated by the barrier (Figure 1).
Figure 1
The resolution is constant irrespectively of work conditions, as it only depends on the
geometric characteristics of the lenses and the distance between the centres of two adjacent
lenses.
The height of the protected area is the height that is actually protected by the safety
barrier. If the latter is placed horizontally, this value refers to the depth of the protected area.
The working range is the maximum operative distance that can exist between the Emitter
and the Receiver.
ADMIRAL AX BK is available with the following resolutions:
–14 mm, 20 mm (protected height from 150 mm to 1800 mm)
PROTECTION OF FINGERS
–40 mm (protected height from 310 mm to 1800 mm)
PROTECTION OF HANDS
–90 mm (protected height from 610 mm to 1800 mm)
PROTECTION OF BODY
P = Pitch between two lenses
D = Diameter of one lens
R = Resolution = P+D

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INSTALLATION
Before installing the ADMIRAL AX BK safety system, make sure that:
The safety system is only used as a stopping device and not as a machine control
device.
The machine control can be actuated electrically.
All dangerous machine movements can be interrupted immediately. In particular, the
machine stopping times must be known and, if necessary, measured.
The machine does not generate dangerous situations due to materials projecting or
falling from overhead; if that is not the case, additional mechanical guards must be
installed.
The minimum dimensions of the object that must be intercepted are greater than or
equal to the resolution of the specific model.
Knowledge of the shape and dimensions of the dangerous area enables the width and height
of the relative access area to be calculated.
Compare these dimensions with the maximum working range and the height of the
protected area in relation to the specific model.
The general instructions set out below must be taken into consideration before placing the
safety device in position.
Make sure that the temperature of the environment in which the system is to be
installed is compatible with the temperature parameters contained in the technical
data sheet.
Do not install the Emitter and Receiver close to bright or high-intensity flashing light
sources.
Certain environmental conditions may affect the monitoring capacity of the
photoelectric devices. In order to assure correct operation of equipment in places
that may be subject to fog, rain, smoke or dust, the appropriate correction factors Cf
should be applied to the maximum working range values. In these cases:
where Pu and Pm are, respectively, the working and maximum range in meters.
Pu = Pm x Cf

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The recommended Cf factors are shown in the table below:
ENVIRONMENTAL CONDITION CORRECTION FACTOR Cf
Fog 0.25
Steam 0.50
Dust 0.50
Dense fumes 0.25
If the device is installed in places that are subject to sudden changes in temperature,
the appropriate precautions must be taken in order to prevent the formation of
condensation on the lenses, which could have an adverse effect on monitoring.
POSITION
The position of the AXE BK Emitter and the AXR BK Receiver must prevent access to the
danger zone from above, below and from the sides, unless at least one of the optical beams
has been intercepted. Some useful information regarding the correct position of the barrier is
shown in the figure below.
Incorrect positioning of barrier
Correct positioning of barrier
Figure 2

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MASTER/SLAVE POSITIONING
In addition to the standard ADMIRAL models, ADMIRAL AX BK is available in the
MASTER/SLAVE configuration. Such configuration is made of two pairs of light curtains,
where the two emitters and the two receivers are respectively connected in series.
In master/slave models the blanking function is available only on the MASTER barrier.
The most common application is shown in Figure 3: the horizontal light curtain (A) has been
installed to detect the presence of a person between the vertical light curtain (B) and the
dangerous machine at system power-up or restart.
Figure 3
The length of the connection cable between the master and the slave can be up to 50 m.
This makes it possible to install two light curtains - one at the front and the other at the rear
of the machine – with just one connection to the power and control circuits of the machine.
PROTEZIONE MECCANICA
PROTEZIONE MECCANICA
MACCHINA
PERICOLOSA
TX1 TX2
RX1 RX2
BARRIERA
MASTER BARRIERA
SLAVE
Figure 4
MECHANICAL GUARD
MASTER
BARRIER SLAVE BARRIER
DANGEROUS
MACHINE
MECHANICAL GUARD
Barrier B
(MASTER)
Barrier A
(SLAVE)
Reference plane
Point of danger

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SAFETY DISTANCE CALCULATION
The barrier must be installed at a distance that is greater than or equal to the minimum
safety distance S, so that a dangerous point can only be reached after all hazardous
machine movements have stopped (Figure 5).
According to European standard EN999, the minimum safety distance Smust be calculated
using the following formula:
S = K (t1+ t2) + C
where:
S minimum safety distance mm
K approach speed of object to the dangerous area mm/sec
t1response time of the safety barrier in seconds sec
t2machine response time, in seconds, meaning the time
required for the machine to interrupt the dangerous movement
following transmission of the stop signal sec
c additional distance mm
The non-observance of the correct safety distance reduces or cancels the protective
action of the light curtain.
If the position of the barrier does not prevent the operator from having access to the
dangerous area without being detected, additional mechanical guards must be
installed to complete the system.
“S”=Safety distance
Figure 5
HAZARDOUS
MACHINE
S

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VERTICAL POSITION OF THE BARRIER
14 mm, 20 mm resolution models.
These models are suitable for the protection of
fingers.
40mm resolution models.
These models are suitable for the protection of
hands.
The minimum safety distance Sis calculated
according to the following formula:
S = 2000(t1+ t2) + 8(D-14)
(D=resolution)
This formula is valid for distances Sbetween 100
and 500 mm. If this formula results in Sbeing
greater than 500 mm, the distance can be reduced
to a minimum of 500 mm by means of the following
formula:
S = 1600(t1+ t2) + 8(D-14)
If, due to the specific configuration of the machine,
the dangerous area can be accessed from above,
the highest beam of the barrier must be at a height
Hof at least 1800 mm from the base Gof the
machine.
Figure 6
90 mm resolution models.
These models are suitable for the protection of
arms or legs and must not be used to protect
fingers or hands.
The minimum safety distance Sis calculated
according to the following formula:
S = 1600(t1+ t2) + 850
ÎThe height Hof the highest beam from the
base Gmust never be less than 900 mm,
while the height of the lowest beam P
must never be more than 300 mm.
Figure 7
safety barrier point of
dan
g
e
r
direction
of
approach
reference plane
safety barrier point of
dan
g
e
r
direction
of
approach
reference plane

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HORIZONTAL POSITION OF THE BARRIER
When the object’s direction of approach is parallel to
the floor of the protected area, the barrier must be
installed so that the distance between the outer limit
of the dangerous area and the most external optical
beam is greater than or equal to the minimum safety
distance Scalculated as follows:
S = 1600(t1+ t2) + 1200 – 0.4H
where His the height of the protected surface from
the base of the machine;
H = 15(D-50)
(D=resolution)
In this case, Hmust always be less than 1 meter.
Figure 8
safety barrier
point of
dan
g
e
r
direction
of approach
reference plane

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ELECTRICAL CONNECTIONS
WARNINGS
Before making the electrical connections, make sure that the supply voltage complies with
that specified in the technical data sheet.
Emitter and Receiver units must be supplied with 24Vdc±20% power.
The external power supply must comply with the standard EN 60204-1.
The electrical connections must be made according to the diagrams in this manual. In
particular, do not connect other devices to the connectors of the Emitter and Receiver.
For reliability of operation, when a diode jumper supply unit is used, its output capacity must
be at least 2000µF for each absorbed A.
MASTER/SLAVE CONNECTORS LOCATION
Figure 9
SLAVE CONNECTOR
SECONDARY MASTER CONNECTOR
PRIMARY
MASTER
CONNECTOR

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EMITTER CONNECTIONS
MASTER MODELS (PRIMARY CONNECTOR), SLAVE and STANDARD M12, 5-pin connector.
PIN COLOR NAME TYPE DESCRIPTION FUNCTIONING
1 Brown 24VDC +24 VDC power supply -
3 Blue 0VDC 0 VDC power supply -
5 Grey PE Ground connection -
2 White RANGE0
4 Black RANGE1
INPUT
Barrier configuration According the standard
EN61131-2 (ref. Table 3)
Table 1
MASTER MODELS (SECONDARY CONNECTOR) - M12, 5-pin connector.
PIN COLOR NAME TYPE DESCRIPTION FUNCTIONING
1 Brown 24VDC +24 VDC power supply -
3 Blue 0VDC 0 VDC power supply -
5 Grey PE INPUT Ground connection -
2 White RANGE0
4 Black RANGE1 OUTPUT Barrier configuration According the standard
EN61131-2 (ref. Table 3)
Table 2
TEST and RANGE SELECTION (MASTER ONLY)
PIN 4 PIN 2 FUNCTIONING
24VDC 0VDC HIGH range
0VDC 24VDC LOW range
0VDC 0VDC Emitter in test mode
24VDC 24VDC Selection error
Table 3
RECEIVER CONNECTIONS
RECEIVER
SLAVE MODELS
MASTER MODELS (SECONDARY CONNECTOR)

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SLAVE MODELS - M12, 5-pin connector
PIN COLOR NAME TYPE DESCRIPTION FUNCTIONING
1 Brown 24VDC - +24 VDC power supply -
3 Blue 0VDC - 0 VDC power supply -
5 Grey PE - Ground connection -
2 White OSSD1 OUTPUT
4 Black OSSD2 OUTPUT Safety static outputs PNP active high
Table 4
MASTER MODELS (SECONDARY CONNECTOR) - 5 poles M12.
PIN COLOR NAME TYPE DESCRIPTION FUNCTIONING
1 Brown 24VDC - +24 VDC power supply -
3 Blue 0VDC - 0 VDC power supply -
5 Grey PE - Ground connection -
2 White SLAVE1 INPUT
4 Black SLAVE2 INPUT Slave OSSD outputs
readout
According the standard
EN61131-2
(PNP active high)
Table 5
RECEIVER
MASTER MODELS (PRIMARY CONNECTOR) - STANDARD MODELS
MASTER MODELS (PRIMARY CONNECTOR) - 8 poles M12.
STANDARD MODELS - 8 poles M12 connector.
PIN COLOR NAME TYPE DESCRIPTION FUNCTIONING
2 Brown 24VDC - +24 VDC power supply -
7 Blue 0VDC - 0 VDC power supply -
8 Red PE - Ground connection -
1 White OSSD1 OUTPUT
3 Green OSSD2 OUTPUT Safety static outputs PNP active high
5 Grey SEL_A INPUT
6 Pink SEL_B INPUT
4 Yellow SEL_C INPUT Barrier configuration According the standard EN61131-2
(ref. Par. "Configuration and operation
modes")
Table 6
WARNINGS REGARDING THE CONNECTION CABLES
•For connections over 50 m long, use cables with a cross-section area
of 1 mm2.
•The power supply to the barrier should be kept separate from that to other
electric power equipment (electric motors, inverters, frequency converters) or
other sources of disturbance.
•Connect the Emitter and the Receiver to the ground outlet.
•The connection cables must follow a different route to that of the other power
cables.

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AUTOMATIC FUNCTIONING
The ADMIRAL AX BK light curtain features only one Automatic operating mode (without re-
start interlock).
The ADMIRAL AX BK light curtain is not equipped with a start/restart interlock
circuit. This safety function is compulsory in most applications. The safety modules
of the AD SR series permit safe implementation of this function according to IEC
61496-1. Carefully assess the related risks analysis of own application.
In this functioning mode, the OSSD1 and OSSD2 safety outputs comply with the status of
the light curtain :
•with the area protected free, the outputs are active.
•with the area protected occupied, they are de-activated.
BLANKING FUNCTION
The ADMIRAL AX BK opto-electronic light curtain features a floating blanking function according to
which the user can inhibit the detection function from a minimum of 1 beam to a maximum of 3
adjacent beams with two different types of functioning according to the selected method of
configuration.
The blanking function is useful in applications in which, in specific safety conditions, opaque objects
must be introduced in the area protected by the light curtain without stopping the controlled machine.
This function is particularly useful when the area protected by the light curtain may be intercepted by
the material being processed or by a fixed or mobile part of the machine.
ÎNote that this function cannot be activated on the synchronism beam (1st beam
starting from the signalling label with display).
ÎUsing the blanking function, the resolution of the light curtain is modified according
to Table 7 and Table 8.
When the width of the mobile object is less than that of the protected area (range),
suitable mechanical guards must be provided to the sides in order to prevent accidents
due to the unprotected areas. If the object is moved vertically, the safety guards must
move so that they remain adjacent with this. (Figure 10)
Figure 10
MECHANICAL
GUARDS
UNPROTECTED ARE
A

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ADMIRAL AX BK features two different types of blanking:
•Blanking Without Object Presence Obligation (Mode A)
•Blanking With Object Presence Obligation (Mode B)
Blanking Without Object Presence Obligation (Mode A)
With this function, an object can be introduced in the dangerous area without de-activating the outputs
of the light curtain. The resolution is modified for the entire height of the protected area.
When the mobile object is removed, the outputs remain active. For this type of blanking, it is possible
to choose between three different methods of operation:
1. Mode A1: (Figure 11)
•With all the beams free, the protected area is free.
•With one beam occupied (except for the synchronism beam), the area is considered free.
•With two or more beams occupied, the area is considered occupied.
CURTAIN free free occupied occupied occupied
STATUS
Figure 11
2. Mode A2: (Figure 12)
•With all the beams free, the protected area is free.
•With one or two adjacent beams occupied (except for the synchronism beam), the area is
considered free.
•With two or more non-adjacent beams occupied, the area is considered occupied.
CURTAIN free free free occupied occupied
STATUS
Figure 12
3. Mode A3: (Figure 13)
•With all the beams free, the protected area is free.
•With one, two or three adjacent beams occupied (except for the synchronism beam) the
area is considered free.
•With two or more non-adjacent beams occupied, the area is considered occupied.

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CURTAIN free free free occupied free occupied
STATUS
Figure 13
Nominal resolution Type of Blanking Effective resolution Maximum size of mobile object *
No blanking 14 mm 0
Floating blanking A1 24 mm 8
Floating blanking A2 34 mm 18
14 mm
Floating blanking A3 44 mm 28
No blanking 20 mm 0
Floating blanking A1 30 mm 10
Floating blanking A2 40 mm 20
20 mm
Floating blanking A3 50 mm 30
No blanking 40 mm 0
Floating blanking A1 70 mm 30
Floating blanking A2 100 mm 60
40 mm
Floating blanking A3 130 mm 90
Nominal resolution Type of Blanking Distance between
beams Maximum size of mobile object *
No blanking 80 mm 0
Floating blanking A1 150 mm 60
Floating blanking A2 230 mm 140
90 mm
Floating blanking A3 300 mm 210
Table 7 - Blanking Without Object Presence Obligation
* Data obtained with optimal alignment between Emitter and Receiver
Calculate the safety distance S according to the formula provided on page 8 applying
the effective value taken from Table 7 to D (resolution).

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Curtain free Curtain occupied
Blanking With Object Presence Obligation (Mode B)
With this function, an object (mobile or fixed) can be maintained inside the danger zone without de-
activation of the light curtain outputs.
The size of the introduced object must not be less than the initial resolution of the
light curtain or than the distance between the beams (in 90mm case). The object
must be inside the protected area during each phase of the process in which the
light curtain is active.
The width of the introduced object must be equal to that of the entire area protected by the light curtain
(range); if this condition is not complied with, the effective resolution obtained from Table 8 cannot be
considered valid inside and at the margins of the blanking area and a resolution corresponding to that
obtained with Mode A for a corresponding number of beams must be considered
(B1 is equivalent to A2 and B2 to A3).
If the object introduced has the above-mentioned characteristics, a resolution equal to the initial
resolution (without blanking) can be considered for the light curtain for the entire protected area except
at the margins of the blanking area where the effective resolution obtained from table 8 must be
considered.
This method of blanking is available with two configurations:
1. Mode B1: (Figure 14)
•With all the beams free, the mobile object is absent, therefore the outputs are de-
activated. The letter “b” is shown on the display of the receiver, indicating that the outputs
are de-activated due to absence of the mobile object.
•With one beam occupied (except for the synchronism beam), the mobile object is present
(blanking active and outputs ON).
•With two adjacent beams occupied (except for the synchronism beam), the area is
considered free (tolerance of 1 beam).
•With two or more non-adjacent beams occupied, the area is considered occupied.
CURTAIN occupied free free occupied occupied
STATUS
Figure 14
MOBILE
OBJECT

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2. Mode B2: (Figure 15)
•With all the beams free, the mobile object is missing, therefore the outputs are de-
activated. The letter “b” indicating that the outputs are de-activated due to the absence of
the mobile object is shown on the display of the receiver.
•With one beam occupied, the mobile object is present (blanking active and outputs ON).
•With two or three adjacent beams occupied (except for the synchronism beam), the area
is considered free (tolerance of ±1 beam).
•With two or more non-adjacent beams occupied, the area is considered occupied.
CURTAIN occupied free free occupied free occupied
STATUS
Figure 15
Nominal resolution Type of Blanking Effective resolution at the edges of the blanking area
No blanking 14 mm
Floating blanking B1 16 mm
14 mm
Floating blanking B2 26 mm
No blanking 20 mm
Floating blanking B1 20 mm
20 mm
Floating blanking B2 30 mm
No blanking 40 mm
Floating blanking B1 60 mm
40 mm
Floating blanking B2 90 mm
Nominal resolution Type of Blanking Minimum detectable object
No blanking 90 mm
Floating blanking B1 140 mm
90 mm
Floating blanking B2 210 mm
Table 8 - Blanking With Object Presence Obligation
Calculate the safety distance S following the formula of page 8 using the D value
obtained from table 8.

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Curtain free Curtain occupied
CONFIGURATION OF THE TYPE OF BLANKING
The Type of Blanking of the ADMIRAL AX BK light curtain is set with suitable connections on
the M12 8-pin connector of the Receiver (Table 9).
CONNECTIONS FUNCTIONING MODE
SEL_A (pin 5)
connected to:
0VDC
SEL_B (pin 6)
connected to:
0VDC
SEL_C (pin 4)
connected to:
0VDC
No blanking
SEL_A (pin 5)
connected to:
0VDC
SEL_B (pin 6)
connected to:
24VDC
SEL_C (pin 4)
connected to:
24VDC
Blanking Without Object
Presence Obligation – Mode
A1
SEL_A (pin 5)
connected to:
24VDC
SEL_B (pin 6)
connected to:
0VDC
SEL_C (pin 4)
connected to:
24VDC
Blanking Without Object
Presence Obligation - Mode
A2
SEL_A (pin 5)
connected to:
24VDC
SEL_B (pin 6)
connected to:
24VDC
SEL_C (pin 4)
connected to:
0VDC
Blanking Without Object
Presence Obligation - Mode
A3
SEL_A (pin 5)
connected to:
OSSD1 (pin 1)
SEL_B (pin 6)
connected to:
OSSD2 (pin 3)
SEL_C (pin 4)
connected to:
24VDC
Blanking With Object
Presence Obligation - Mode
B1
SEL_A (pin 5)
connected to:
OSSD2 (pin 3)
SEL_B (pin 6)
connected to:
OSSD1 (pin 1)
SEL_C (pin 4)
connected to:
0VDC
Blanking With Object
Presence Obligation - Mode
B2
Table 9
It is not possible to modify the configuration of the type of Blanking with the light
curtain operating. The system must first of all be switched off and then on again.
MOBILE
OBJECT

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Example of MASTER-SLAVE connection in AUTOMATIC operating mode with
Blanking Without Object Presence Obligation (Mode A1)
Figure 16
ÎIn order to assure a correct barrier operation, it is necessary to
connect the pins 2 and 4 of the Emitter according to table 3 (page 11) and
to the "TEST FUNCTION" paragraph of page 31.
(Ref. Table 3
Page 11)