Function Description; Transport And Storage - Aventics IS12-PD-ISO 5599-1 Betriebsanleitung

AVENTICS | IS12-PD-ISO 5599-1 | R422003189–BAL–001–AB | English
Dual valve
1 2
1 Valve 1: IS12-PD
2 Valve 2: IS12-PD
3 Mounting screws 4 x Ø 6.4 mm for M6 screws
4 Base plate
5 Connection 1, G1/4
6 External pilot connection G1/8
7 Exhaust ports with silencer
8 Label
9 Sensor LED
10 Working connection 2 or 4, G1/4
11 Connection 4 ext, G1/4 (for non-return valve)
Valve IS12-PD
3
1 Valve
2 Valve cover, valve side 12
3 Valve cover, valve side 14
4 Sensor housing, bolted to valve cover (3)
5 Mounting screws for the sensor housing
6 Sensor slot
7 Sensor cable
8 Sensor plug
9 Sensor LED
10 Coil lock nut
11 Coil
12 Contact for connecting an electrical connector
13 Mounting screws for the pilot valve
14 Pilot valve
15 Mounting screws for valve
16 Base plate gasket
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Function Description

Dual valve
The dual valve includes two IS12-PD valves with slider position detection and can fulfill the two
following safety functions:
W
SF1: Safe exhaust
W
SF2: Prevention of unexpected start-up
The dual valve is available in two different configurations: without and with integrated non-return
valve (see Fig. 5 and 6 ).
A system that is connected to working connection 2 of the dual valve
(or 4 for the variant with non-return valve) of the dual valve is protected against unexpected
start-up and can be safely exhausted. It is also possible to choose a variant with integrated non-
return valve, to secure a start-up valve connected to connection 4 of the dual valve for example,
as shown in Fig. on the right.
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In addition to the dual channel design, the valves are equipped with a slider position detection
(see "Valve with position detection" for details) to improve the diagnostic coverage level.
Both sensors emit a signal (supply voltage) when working perfectly. One of the valve does not
emit a signal in case of malfunction. No further cycle must be performed in this case, otherwise
the dual duct capacity can no longer be ensured. It is not sufficient to check whether the sensor
signal shows ON after switching the valves off. With each cycle, it must be checked whether the
sensor signal changes from OFF to ON.
Both safety functions are described in more detail in the following. The procedure to test the
safety functions is explained in chapter 9 "Commissioning".
SF1: Safe exhaust
Both valves are electrically switched off to exhaust a system connected to the dual valve.
Variant without non-return valve
In fault-free operation, the exhaust from the connected system can be exhausted via dual ducts,
using both connection 1 of valve 2 (sensor and coil labeled with BG2 or MB2) or via connection 4
of valve 1 (sensor and coil labeled with BG1 or MB1).
If valve 2 does not allow any more exhausting, the air can escape via valve 1 and vice versa.
Furthermore, if valve 2 remains in the closed position (valve connection 2 remains connected
with valve connection 3), the exhaust air can escape through connection 2 of valve 1 via
connection 3 of the dual valve.
Variant with non-return valve
In fault-free operation, the exhaust from the connected system can be exhausted via dual ducts,
both via connection 5 of valve 2 or via connection 5 of valve 1.
If valve 2 does not allow any more exhausting, the air can escape via valve 1 and vice versa.
Furthermore, if valve 2 remains in the switched position (valve connection 4 remains connected
with valve connection 1), the exhaust air can escape through connection 4 of valve 1 via
connection 5 of the dual valve.
The exhaust duct on the system to be secured must be connected with connection 4 and 4 ext of
the dual valve. Even if connection 4 ext is not required, this must be connected (add connection
between connection 4 and 4 ext of the dual valve) to ensure dual duct exhaust.
The non-return valve function is not monitored. The requirements of category 3 or 4 are not
fulfilled. The variant with non-return valve is therefore classified in category 1 and a maximum
PL = c can be achieved.
SF2: Prevention of unexpected start-up
Both valves are switched without current with this function (when working perfectly). Even if one
of the two valves is unintentionally switched on, the system connected to the dual valve is not
pressurized.
Variant without non-return valve
Series connection of both valves allows double protection against unexpected start-up. If valve 1
pressurizes valve connection 2, pressurization of the overall system is still prevented by the
blocked valve connection 2 of valve 2. If valve 2 switches unintentionally, the air supply is still
prevented by valve 1, i.e. connection 2 of the dual valve is not pressurized.
Variant with non-return valve
If valve 1 pressurizes valve connection 2, connections 4 and 4 ext of the dual valve are still
disconnected from the compressed air supply because valve 2 and the non-return valve block
the compressed air supply.
In case of a malfunction of valve 2 or the non-return valve, the air supply is still blocked by valve
1 i.e. connections 4 and 4 ext of the dual valve are not pressurized.
The non-return valve is not position monitored. If you require a PL e,
you can undertake fault exclusion for the IS12-PD valves for independent change of the output
switching position (without input signal).
Valve with position detection
IS12-PD series valves are electrically operated pneumatic 5/2 directional valves with an
integrated slider position detection. Slider position detection is realized by means of the
following system: A magnet is integrated in the piston (slider)
of the valve and an ST4 series proximity sensor with an M8x1 connection is installed in a sensor
housing on valve side 14.
The sensor LED indicates the position of the slider. This allows the user to detect whether the
valve is in the home position (sensor LED is lit) or in the switching state (sensor LED is not lit). In
addition, the position of the sensor is transferred to the controller via the M8 connection, PIN 4
(OUT).
The sensor is switched on when the slider is located on valve side 14,
meaning in home position. In this case, the sensor LED is lit.
The sensor is switched off when the slider is located on valve side 12,
i.e. in the switching position. In this case, the sensor LED is not lit.
Home position, sensor LED lit
When the valve is not actuated electrically, it is in home position. The slider is positioned so that
connections 1 and 2 and connections 4 and 5 are connected respectively. With typical use,
connection 2 is under pressure while connection 4 is pressure-free. The sensor LED is switched
on and indicates that the valve is in the home position. The output voltage is applied to pin 4
(OUT). To ensure the system is not under pressure in home position, the working connection to
the system must be connected at connection 4.
Switching position, sensor LED not lit
When the valve is actuated electrically, it is in switching position. The slider is positioned so that
connections 2 and 3 and connections 1 and 4 are connected respectively. With typical use,
connection 2 is pressure-free while connection 4 is under pressure. The sensor LED is switched
off and indicates that the valve
is in the switching position. 0 volts are applied to pin 4 (OUT). To ensure the system is under
pressure in the switching position, the working connection to the system must be connected at
connection 4.
Change of sensor signal when pressurizing working connection 2 or 4
When the valve is switched on, the slider moves from valve side 14 to valve side 12 (see number
2 and 3 in Fig. 3 ). During slider movement, the signal of the sensor switches from "ON" to "OFF".
Change of sensor signal when exhausting working connection 2 or 4
When the valve is switched off, the slider moves from valve side 12 to valve side 14. During slider
movement, the signal of the sensor switches from "OFF" to "ON" if connection 2 is connected to
connection 1 or connection 4 is connected to connection 5.
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Transport and Storage

The dual valve is packaged to protect it from contamination. Do not remove the
packaging until just before assembling the valve.
Transport
Danger of injury from falling!
The dual valve can weigh up to 2400 g and cause injury if it falls.
O
Always transport the dual valve carefully.
O
Wear suitable protective clothing, such as safety shoes.
Dual valve damage due to falling!
If the dual valve falls, the product may be damaged even if no damage is visible.
O
Always transport the dual valve carefully.
O
If the dual valve has fallen, it must not be installed.
O
Check the packaging when you receive the product. If the packaging is damaged, the dual
valve must not be installed.
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CAUTION
NOTICE
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