WM100 Motion Sensor Catalog Specification Sheet

© Siemens AG 2016
Process Protection
Motion sensors
SITRANS WM100 motion sensor
■ Overview
Max. 100 (4)
SITRANS WM100 is a heavy-duty zero-speed alarm switch. This
non-contacting unit provides cost-effective
equipment protection even in the harshest conditions.
■ Benefits
• Up to 100 mm (4 inch) gap between SITRANS WM100 and
targets
• Rugged, low maintenance suitable for tough environments
• 1 SPDT Form C relay contact
• Provides cost-effective protection
• Visual indication of target triggered pulse
SITRANS WM100 mounting, dimensions in mm (inch)
■ Technical specifications
Mode of operation
Measuring principle
Disruption of magnetic field by ferrous target
Typical application
Monitors absence or presence of
motion in harsh conditions
Output
Contact
1 SPDT Form C dry relay contact,
rated 5 A at 250 V AC, fail-safe operation
Time delay
Start up: 10 ... 14 seconds
(5 ... 7 seconds with 12 ppm jumper
installed)
Zero Speed (selected via a common
jumper)
• 5 seconds ± 1 (minimum speed
10 ... 15 ppm) or
• 10 seconds ± 2 (minimum speed
5 ... 7.5 ppm)
■ Application
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 warns 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).
• Key Applications: tail pulleys, driven pulleys, motor shaft
sensing, screw conveyor flights, bucket elevators
Rated operating conditions
Operating temperature
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
(3.30 mm2) wire size
■ Design
Mounting
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 inch) from the face of the target
to the face of the probe for 4.5 x 4.5 mm (3/16 x 3/16 inch) 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.
-40 ... +60 °C (-40 ... +140 °F)
Design
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
Maximum 3 000 pulses per minute
Shipping weight
2 kg (4.4 lb)
Power supply
• 115 V AC/50 ... 60 Hz, 7 VA
• 230 V AC/50 ... 60 Hz, 7 VA
• ± 10 % of rated voltage
Certificates and approvals
CSAUS/C, CE, RCM
Siemens FI 01 · 2016
6/25
6
© Siemens AG 2016
Process Protection
Motion sensors
SITRANS WM100 motion sensor
Selection and Ordering data
Article No.
Selection and Ordering data
SITRANS WM100
A heavy-duty zero-speed alarm switch that does
not require a controller.
7MH7158 -
Further designs
0 7A 0 0
Please add "-Z" to Article No. and specify Order
code(s).
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Model
115 V AC
230 V AC
Manufacturer's Test Certificate: According to
EN 10204-2.2
C11
Acrylic coated, stainless steel tag [13 x 45 mm
(0.5 x 1.75 inch)]: Measuring-point number/
identification (max. 16 characters),
specify in plain text
Y17
Operating Instructions
Article No.
English
7ML1998-5MW01
German
Note: The operating instructions should be ordered
as a separate item on the order.
All literature is available to download for free, in a
range of languages, at http://www.siemens.com/
processinstrumentation/documentation
This device is shipped with the Siemens Level and
Weighing manual DVD containing the complete
operating instructions library.
7ML1998-5MW31
Locknut
7MH7723-1CR
Mounting flange
7MH7723-1CS
Motion cable gland adaptor kit
7MH7723-1JN
■ Dimensional drawings
Dimensions
Detail A
6 dia. hole for 1/4...20 bolt on
114 (4.5) BCD, 4 places
Cap,
aluminum
226 (8.90)
197 (7.76)
127 (5.00)
o.d.
133 (5.25)
Circuit
card
60 (2.38)
6
A
B
Order code
2" NPSL
25 (1)
Mounting
10...32
screw x 4
3/4" NPT
Conduit
entrance
Cap gasket,
neoprene
Locknut,
plated
Casing gasket,
neoprene
Casing,
aluminum
2" NPSL,
aluminum
probe body
6 dia. hole for
1/4...20 bolt or drill
and tap on 114 (4.5)
BCD, 4 places
Mounting flange,
see detail A
95 (3.75) dia.
probe clearance
hole
SITRANS WM100 mounting, dimensions in mm (inch)
6/26
Siemens FI 01 · 2016
© Siemens AG 2016
Process Protection
Motion sensors
SITRANS WM100 motion sensor
■ Schematics
Detection
indicator LED
Terminal block
for customer
connection
Note 1
Note 2
Note 3
Terminal
circuit card
1TB
L2/N
L1
NC
COM
NO
5 4 3 2 1
115/230 VAC
50/60 HZ 2.5 VA
5SEC/
12PPM
8 7
Ground terminal
for customer
connection
6
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.
Siemens FI 01 · 2016
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