Control for suction plants Type STW84V
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The basic function of the device is to detect whether a current is flowing in the supply line of one of several woodworking machines. If a current flow is detected, the device opens a valve on the machine's suction channel. At the same time, the extraction system is switched on. When a machine is switched off, the device closes the associated valve with a delay. If the last machine is switched off, the extraction system also stops after a delay.
The current relay STW84V monitors up to 8 alternating current sets on current flow yes/no. The inputs can analyse signals of current transformers type STWA1(H) or of potential-free contacts.
For controlling of great dedusting plants several relays can be combined.
Applications
Controlling of dedusting plants in the timber and plastic processing industry according to the technical rules for dangerous materials TRGS 553. The central suction is switched on, as soon as any machine is put into operation. According slide-valves in the suction ducts of the individual machines are opened. In addition, cleaning of a filter (vibration) and a cellular wheel/discharge can be controlled, an external cleaning (with pressurized air) can be started or exceeding of max. volume flow can be reported. The analog output 0...10 V can control a frequency-converter at the motor of the ventilator and thus optimize performance and save energy.
- Monitoring of 8 machines (STWA1(H) or contact)
- input for "open all slide-valves"
- 8 relays (with change-over contacts) for slide-valves
- 1 relay for control ventilator
- 1 relay for filter-cleaning
- 1 relay for control of cellular wheel/discharge or report exceeding max. volume-flow
- analog output for control of frequency-converter and combination of more STW84V
- terminals pluggable
- universal supply voltage AC/DC 24-270 V
| Product group: | Switching Relays and Controls |
|---|---|
| Input/ Measured parameter: | Current detection yes/no, Digital input |
| Outputs: | Analog outputs 0/4-20 mA, 0-10 V, Outputs/Relays |
| Supply voltage: | AC/DC 24 - 270 V |
| Design: | Mount in switchgear cabinet, Mount in circuit breaker box |
| Approval: | EU / UKCA-Declaration of Conformity |
| Applications: | Controils for suction plants |
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FAQ / Product videos
Accessories
You found a device in that meets your requirements and you want to install it in a control panel or in the door of a control cabinet?With the installation frame of the ER series, this is possible for all ZIEHL devices in housings V4, V6 and V8 (width 70/105/140 mm).Enclosed by a high-quality frame made of anodized aluminum, all displays can be read outside the control cabinet. Switches, buttons and joystick can be operated.
The STWA1 current transformer is made to match the STW current monitor. One current transformer is required for each line being monitored. The STWA1 consists of a climate-proven sealed-in coil with toroidal tape core. The connection cables are permanently fixed to the transformer and are 1 m in length. The level of the current to be monitored is limited to 100 A continously, 300 A for max. 10s.In case of current of more than approx. 5 A, an LED can be triggered directly via the STWA 1 current transformer. Thus it's easy for users to visually monitor the current conduction in a line. The LED is protected by an anti-parallel diode or by its connection in series. A protective resistor is necessary depending on the LED used or the level of current being monitored.Weight: approx. 43 g
