| Items |
 490 Prox Type 490 Prox Pneumatic Proximity Switch |
 495 Type 495 Pneumatic Totalizing Counter |
 497 Type 497 Adding Pneumatic Preset Counter |
 499 Type 499 Pneumatic Timer Counter |
||||
| Description | The proximity switch 490 with ATEX does not require contact and is triggered by a magnetic field or an Fe object. The device does not require a continuous air supply. A further advantage of the proximity switch is its compact dimensions. The ATEX version of pneumatic proximity switch 490 is certified for use in potentially explosive atmospheres where there is a risk of gas or dust explosion, zones 1 and 21 as well as for Mining (category M2). | Type 495 integrated, impressively easy installation using hose coupler or rapid-fit connector, maintenance-free operation. This integrated totalizing counter is available in two designs, with either 6 or 8-digit display. Type 495 integrated is available without a reset function or with manual or pneumatic reset. The user-friendly Type 495 for surface-mounting is easily fitted using hose couplers or a rapid-fit connector and is maintenance-free in use. The totalizing counters for surface-mounting has a 6-digit display and is equipped with a convenient pneumatic or manual reset function. | Using two pneumatic preset counters it is possible to implement pilot signals with values ranging from 1 to 99.999. These counters are especially suitable as controlling elements for semi-automatic or fully automated processes. This applies both to varying preset/setting values and to values which remain the same for a long period. | The convenient Type 499 timer with ATEX features compact fitting dimensions and can, as a result of its standard DIN dimensions, also be fitted to a DIN rail system. The unit features a stationary preset value and settable time range from 0.2 to 300 seconds. Type 499 timers do not require a continuous air supply. The ATEX version of pneumatic timer 499 is certified for use in potentially explosive atmospheres where there is a risk of gas or dust explosion, zones 1 and 21 as well as for Mining (category M2). | ||||
| Brands |
Hengstler |
|||||||
| Model | 490 Prox | 495 | 497 | 499 | ||||
| Type | Counter | Counter | Pneumatic Preset Counter | Pneumatic Timer | ||||
| Display | 6 or 8-digit, depending on version | 3 or 5-digit indication of count and preset value, depending on version | Digit Roll | |||||
| Digit Height | 4 mm | 4 mm | ||||||
| Service Pressure | 2 to 8 bar | 2 to 8 bar | ||||||
| Air Quality | Oil Free | Oil Free | Oil Free | |||||
| Filter Pore Width | < 40 µs | < 40 µs | < 40 µs | |||||
| Mounting | Front Panel | Clamping spring or DIN rail attachment | ||||||
| Mounting Position | Any | Horizontal Roller Axis | ||||||
| Protection Class (IEC 144) | Ingress Protection (IP) 40 with hoses connected; for higher degree or protection we recommend clear covers | |||||||
| Operating Pressure | 2 to 6 bar | 2 to 6 bar | ||||||
| Quality of Air | Free of oil | |||||||
| Width of Filter Pores | < 40 µm | |||||||
| Operating Temperature | -15 to 60 ºC | -15 to 60 ºC | 0 to 60 ºC | |||||
| Storage Temperature | -40 to 60 ºC | 0 to 60 ºC | ||||||
| Connection | Nipple plug for pipe of nominal size 3 | Hose coupler M5 or rapid-fit connection (depending on version) | Hose coupler M5 or rapid-fit connection (depending on version) | Hose coupler M5 or rapid-fit connection (depending on version) | ||||
| Flow Rate | 40 L/min | |||||||
| Nominal Size | 2 mm | |||||||
| Repeatability of Operating Point (±) | 0.2 mm | |||||||
| Approximate Weight | 60 g | |||||||
| Time Range | 0.2 to 3 sec2 to 30 sec20 to 300 sec | |||||||
| Note for Time Range | Depending on version | |||||||
| Input | Timer is started when input 1 is pressurized | |||||||
| Time Setting | Continuous with rotary knob | |||||||
| Minimum Reset Time | 200 ms | |||||||
| Note | Attention! Minimum time period between last count pulse and pneumatic reset is 50 ms. | |||||||
| Features |
|
|
||||||
|
|
||||||||
