© 2021,
ROSS
CONTROLS
®
.
All Rights Reserved.
3.1
Personnel Qualifications
Assembly, installation, commissioning, maintenance, and
decommissioning may only be carried out by qualified
personnel that have the required knowledge of and experience
in dealing with electrical and pneumatic control technology.
4
Delivery Contents
The delivery contents include:
• DM valve • Operating instructions
• 2x blanking plugs for second connection 1+2 (see
section „Connecting the pneumatics and the electrics“)
5
Service, Repair, and Maintenance
f
In case of technical problems or a required repair, please
contact your local ROSS service. If used properly, the DM
valves will not require maintenance. Unless otherwise
required, ROSS recommends performing a functional
test at least once annually (see 7.1 „Conducting a
function test“).
6
Assembly and Installation
6.1 Connecting the Mechanics
The double valves described in these operating instructions
may only be installed by a qualified, trained professional.
The product may only be used within the scope of the “in
-
tended use” as described in these operating instructions.
The cables and cable connections as well as the electrical
control for the double valves must comply with the appli-
cable safety regulations.
6.2
Connecting the Pneumatics and Electrics
Pneumatic connections 1 + 2 can be used on both sides.
The delivery contents include two blanking plugs for unused
connections. These pneumatic connections can be used for
further functions (e.g., for controlling a start valve).
f
Connect the compressed air supply to connection 1 and
the load to connection 2 (see Fig. 1).
Connection 3 is equipped with a silencer at the factory.
f
Connect the electrics in accordance with Fig. 2 and 3.
Sockets in accordance with DIN EN 175301‑803 form A
(previously DIN 43650, form A) for pilots a, b and reset
have to be ordered separately. The pressure switch
includes a socket.
7 Commissioning and Operation
CAUTION
Damage to health due to loud noise!
Levels above 70 dB(A) may lead to damage to health!
f
Always wear ear protectors when working on the product.
Before commissioning, the installation has to be carefully
inspected by a qualified, trained professional.
f
Make sure that the technical data matches the operating
criteria of the machine and/or the pneumatic system.
f
Always set the compressed air supply to a level that en-
sures that the minimum operating pressure is adhered
to (see section 8 „Technical Data“).
The reset valve (not available with DM
1
C) may only be
actuated by a pulse (electrical, manual, or pneumatic) of
max. 3 seconds and with solenoids a + b switched off.
For pneumatic resets, the reset pressure must be higher than
or equal to the operating pressure!
f
Before valve assembly and before initial commissioning,
always actuate the reset valve to switch the DM valve to
its normal position.
In this switching position, the DM valve is ready to run.
7.1
Conducting a function test
Test
Result
1.
Solenoid “a” actuated
Valve is in lockout position,
slight leakage at connection 3.
De-energize DM
1
C! Actuate reset for DM
2®
C!
Valve ready to run again.
2.
Solenoid “b” actuated
Valve is in lockout position,
slight leakage at connection 3.
De-energize DM
1
C! Actuate reset for DM
2®
C!
Valve ready to run again.
3.
Solenoids “a” and “b”
actuated within ∆t < 0.1 s
Valve switches properly.
4.
Solenoids “a” and “b”
actuated with ∆t > 0.1 s
Valve switches to lockout
position, slight leakage at
connection 3.
5.
After fault, permanent signal at
reset valve – solenoids “a” and “b”
or only “a” or only “b” actuated
If the valve remains deactivated,
slight leakage at connection 3.
De-energize DM
1
C! Actuate reset for DM
2®
C!
Valve ready to run again.
If this function test provides deviating results, see section 5
„Service, Repair, and Maintenance“.
Each asynchronous movement of the piston elements >
0.1 s leads to the valve switching off. This could happen
for a variety of reasons, such as:
• Defective piston seals,
• Main valve elements experiencing a switching delay
due to dirt or resinous oil,
•
Insufficient electrical signals to valve solenoids; suitable
voltage not available,
• Receipt of signals at solenoids not synchronous,
• Pilot valves experiencing a switching delay due to da-
maged components, dirt, or resinous oil,
• excessive water build-up in the valve.
8
Technical Data
Design:
Two redundant 3/2 directional main valve ele-
ments in seat-valve design, normally closed. Pneumati-
cally operated. Combined spring and air reset.
Actuation:
Solenoid-operated pilot control.
Medium:
Compressed air (neutral gases), filtered in
acc. with ISO 8573‑1 (class 7 / 40 µm, recommended:
class 6 / 5 µm), oiled or oil‑free (mineral oils according to
DIN 51519/ISO‑VG, viscosity class 32).
Pressure range:
30 to 120 psig (2 to 8 bar).
Ambient temperature:
15° to 122°F (-10° to 50°C).
Medium temperature:
40° to 175°F (4° to 80°C). For
temperatures below 40°F (4°C), the compressed air must
be dried according to ISO 8573‑3, class 7.
Shock test
(based on DIN EN 60068‑2‑27)
:
• Acceleration: 30 g.
• Shock duration: 18 ms.
• Shock waveform: Half-sine.
•
Vibration test (vibration based on DIN EN 60068‑2‑6.
• Frequency: 10 to 55 Hz.
• Amplitude: 0.35 mm ± 0.05 mm.
Min. switching frequency:
1x per month, to ensure
proper function.
Max. switching frequency:
30 Hz measured without
volume. The switching frequency decreases depending
on the volume to be controlled.
Mounting orientation:
Any, preferably vertical.
Monitoring:
Dynamic, cyclic, internal – with any change
in switching state and in any switching state.
DM
1
C, DM
2®
C
5
ENGLISH
