Control Block VOFA Series
Caution
Product Description
[Specifications]
• Can be used for safe reversing of a hazardous movement (5/2-way solenoid valve)
• Can be used for safe venting (3/2-way solenoid valve function, not available as a variant for installation on a valve terminal)
• Purely mechanical solution as a press safety valve, without integrated diagnostics
• Control block can be selected as version for valve terminal VTSA/VTSA‐F
• Control block can be selected as individual pneumatic connection
• High pressure range of 3 to 10 bar
• Flow rates of up to 1,050 l/min
• Sturdy and durable metal components
• Designed as a purely mechanical solution with regard to safety
• Unit assembled and inspected, ready for installation
• Reduced outlay on selection, ordering, installation and commissioning
• Mounting via through-hole (with individual pneumatic connection)
• Mounting as vertical stacking elements on manifold sub-base of the valve terminal
Control Block VOFA Series
Specifications
| Control block | VOFA-L26-T32C-... | |
|---|---|---|
| Design | Piston spool valve | |
| Standard nominal flow rate | [l/min] | 1050 |
| Standard flow rate, Exhaust from 6 > 0 bar | [l/min] | 2650 |
| Standard flow rate, Exhaust 6 > 0 bar in a fault situation | [l/min] | 1050 |
| Reset method | Mechanical spring | |
| Sealing principle | Soft | |
| Exhaust function | With flow control | |
| Actuation type | Electric | |
| Lap | Overlap | |
| Type of control | Piloted | |
| Direction of flow | Non-reversible | |
| Exhaust function | With flow control | |
| Suitability for vacuum | - | |
| Pilot air supply | Internal | |
| Type of mounting | Via through-hole, on manifold sub-base | |
| Mounting position | Any | |
| Manual override | - | |
| Valve signal status display | Via accessories | |
| Pneumatic connections | ||
| Supply | 1 | G1/4 |
| Exhaust | 3/5 | G1/4 (only 3) |
| Working lines | 2/4 | G1/4 (only 2) |
| Pilot air supply | 14 | - |
Electrical data
| Control block | VOFA-L26-T32C-... | |
|---|---|---|
| Electrical connection | Plug to EN 175301-803, type C, without protective earth conductor | |
| Nominal operating voltage [V DC] | 24 | |
| Permissible voltage fluctuations [%] | -15/+10 | |
| Surge resistance [kV] | 2.5 | |
| Degree of contamination | 3 | |
| Power consumption [W] | 1.8 | |
| Max. magnetic disruption field [mT] | 60 | |
| Piston position sensing | Normal position via sensor | |
| Switching position display | With accessories | |
| Duty cycle [%] | 100 | |
| Protection class to EN 60529 | IP65, NEMA 4 (for all types of signal transmission in assembled state) | |
| Protection against direct and indirect contact | PELV (Protective Extra-Low Voltage) Protected to EN 60950/IEC 950 | |
| Valve switching time [ms] | On | 24 |
| Off | 54 | |
| Valve sensor switching time [ms] | On | 58 |
| Off | 11 | |