Function
The press module type C is a hydraulic control for the installation in hydraulic presses according to DIN EN 693:20111) or plastic and rubber machines according to DIN EN 289:2014 and is – according to DIN EN ISO 13849-1 – regarded as “safety-related part of control systems”. The industrial area of application is extended to all machine types which require the safety requirements of the above-specified standards.
The press module type C allows the user to design, construct, and/or modify their downstroke piston functions such as press plunger, sheet downholder and ejector according to the general safety requirements.
In connection with a suitable electric control, category 4, PLe according to DIN EN ISO 13849-1 can be reached for the following safety measures:
Safety measures for the hazard type | Extract from standard | Performance level (PL) | Safety category |
Avoiding the unintended lowering under own weight | DIN EN 693:2011 section 5.2.1, 2 1) |
e | 4 |
Avoiding the unintended start-up from the rest position | DIN EN 693:2011 section 5.4.1.3 a 1) |
e | 4 |
Shutdown of the dangerous closing movement | DIN EN 693:2011 section 5.5.2 b) 1) |
e | 4 |
One-channel, slow velocity in case of command equipment with automatic reset | DIN EN 693:2011 section 5.4.1.3 c) 1) |
c 2) | 1 |
1) | In the future DIN EN ISO 16092-3 |
2) | Higher PL upon request |
The EC type examination certificate HSM15009 has been granted. The tested type complies with the relevant provisions of Directive 2006/42/EC (Machinery).
As amendment to DIN EN 693:2011 1) section 5.2.1, 2, unintended lowering under own weight during the retraction of the hydraulic upholding equipment item 140 is safely prevented.
Any occurring error is immediately detected by the external safety PLC.
Basic module 100
A complete press module type C consists at least of the basic module item 100 and the directional valve item 110.
The safety-related functions (cat. 1 or 4) are part of the basic design and do not influence the attachment of the additional extension modules item 200 2).
The pump and tank connections are arranged laterally and at the bottom and allow for perfect installation into the press. All other actuator ports are arranged laterally 3). The measuring points are always available twice.
Safety-related hydraulic control according to category 4 of EN 954-1:1996 | Directional valve with position monitoring (channel 1) 1) | Item 110 |
Pump pressure limitation | Item 120 … 122 | |
Protection against unwanted pressure build-up on the piston chamberside (channel 2) | Item 130/131/135 | |
Upholding equipment on the annulus area side (channel 2) | Item 140/145 | |
Pressure limitation on the annulus area side against pressure intensification | Item 150/151 | |
Set-up with safe reduced velocity < 10 mm/s according to DIN EN 693:20111) section 5.5.2 b) | Item 170 … 175 | |
Basic functions | Press capacity adjustment | Item 130 … 132 |
Load holding pressure compensation | Item 160 … 165 | |
Additional function | Rapid traverse due to own weight via prefill valve | Item 166 |
1) | In the future DIN EN ISO 16092-3 |
2) | High-response valves with zero overlap requiring the design from item 290 are excluded |
3) | As of size 35, only the tank port T1.1 arranged at the bottom is available |
Extension module 200
With the extension modules item 200, more common variants are available for selection. The extension modules item 200 are installed between the basic module item 100 and the directional valve item 110 and their connection diagram corresponds to the connection diagram of the directional valve item 110. If the extension modules item 200 are used, the safety of the control unit is maintained. All actuator ports are arranged laterally.
The measuring points are always available twice.
Variants | Rapid traverse due to rapid traverse cylinder | Items 210 … 212 |
Operation with high-pressure and low-pressure pumps | Items 220 … 225 | |
Rapid traverse due to differential circuit | Items 230 … 235 | |
Accumulator operation | Items 240 … 249 | |
Set-up by own weight (> 10 mm/s) | Items 260 … 262 | |
Load-sensing | Items 270 … 276 | |
Load-sensing | Items 280 … 282 | |
High-response valve with zero overlap – Energy separation on the piston chamber side (channel 1) – Upholding equipment on the annulus area side (channel 1) |
Items 290 … 291 Items 295 … 297 |
Installation
The pipelines must permanently withstand the maximum operating pressures and comply with the safety requirements according to DIN EN 693:2011 sections 5.2.3 and 5.2.4. It must moreover be ensured that the pipeline between the press module type C (port X2) and the annulus area is designed for the max. set pressure of the pressure relief valves (items 150/151). The pipeline design should be as short as possible.
- Size 10, 16, 25, 32, 35
- Component series 6X
- Maximum operating pressure 350 bar
- Maximum flow 2000 l/min
- Hydraulic control for downstroke piston