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SITRANS WM100 is a heavy-duty zero-speed alarm switch. This non-contacting unit provides cost-effective equipment protection even in the harshest conditions.
This rugged unit is impervious to dust, dirt, build-up and moisture and is ideal for such primary industries as mining, aggregate, and cement. Operating where other systems are prone to failure, the non-contacting design eliminates the need for lubricating, cleaning and part replacement. Downtime and clean-up expenses associated with conveying equipment failure are reduced by the SITRANS WM100. It alarms to minimize spillage, prevent extensive damage or even fire caused by belt slippage at the head pulley and warn against conveyor malfunction.
The SITRANS WM100 has built-in selectable start delays and 1 Form C relay contact. With an aluminum body, it operates from -40 to +60 °C (-40 to +140 °F).
Mode of operation |
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Measuring principle | Disruption of magnetic field by ferrous target |
Typical application | Monitors absence or presence of motion in harsh conditions |
Output |
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Contact | 1 SPDT Form C dry relay contact, rated 5 A at 250 V AC, fail-safe operation |
Time delay | Start up: 10 to 14 seconds (5 to 7 seconds with 12 ppm jumper installed) |
Zero Speed (selected via a common jumper) |
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Rated operating conditions |
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Operating temperature | -40 to +60 °C (-40 to +140 °F) |
Design |
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Probe body | Aluminum |
Process mounting | 2" NPSL |
Connection box | Aluminum, ¾" NPT conduit entrance, 5 screw terminals plus grounding terminal for electrical connection, max. 12 AWG |
Gasketing | Neoprene |
Display | Red LED for verification of pulses |
Enclosure rating | Type NEMA 4x, 6, IP67 |
Dynamic range | Minimum 6 or 12 pulses per minute |
Shipping weight | 2 kg (4.4 lb) |
Power supply |
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Certificates and approvals | CSAUS/C, CE, C-TICK |
The WM100 probe should be mounted, using the supplied mounting flange, onto a vibration-free structure. The gap between the probe and the target should be sufficient such that there is no danger of the target damaging the probe. The maximum allowable gap is 100 mm (4") from the face of the target to the face of the probe for 4.5 x 4.5 mm (3/16 x 3/16") keyway. The WM100 is sensitive to lateral disturbances to its magnetic field. If the WM100 is responding to motion from an interfering target, move the WM100 or install a ferrous plate (steel) as a shield between the WM100 and the interfering target. Where possible, the probe should be mounted such that the cable inlet is pointing downward to avoid accumulation of condensation in the casing. Connection of the probe should be made via flexible conduit for easier removal or adjustment of the probe.
SITRANS WM100 mounting
SITRANS WM100 dimensions and mounting
SITRANS WM100 wiring
Notes:
1. Dry contacts shown in de-energized (alarm or shelf) state.
2. SITRANS WM100 is manufactured for either 115 or 230 V AC operation. Check WM100 nameplate for applicable voltage. Correct voltage must be supplied. Voltages lower than specified will result in an inoperative condition. Voltages higher than specified will severely damage unit.
3. For 5 second time delay and a minimum 12 ppm range, connect jumper across terminals 7 and 8. Without a jumper, the default is a 10 second time delay and a minimum 6 ppm range
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