Installation instructions for
RDS80001/RDS80002 Series
High speed railwheel sensors
Automation and Control Products
PK XP-4061
Issue 1
WARNING
PERSONAL INJURY
• DO NOT USE these products as safety or emer-
gency stop devices, or in any other application where
failure of the product could result in personal injury.
Failure to comply with these instructions could
result in death or serious injury.
General description
The RDS80001 and RDS80002 railwheel sensors are 2 wire dc inductive
proximity sensors. There are 2 types of output available.
RDS80001 - Sensor output current proportional to applied voltage.
Designed to operate at a nominal 16 Vdc with a 1 kOhm load, which will
result in an output of 8 mA with no wheel detected and 2 mA when a
wheel is detected.
RDS80002 - Sensor output current is limited to 2/8 mA within sensor to
allow use of voltage overdrive to counter interconnecting cable losses (10
km +) and still maintain 2/8 mA output without field adjustment.
Both types are available in both high and low frequency versions.
Technical information
RDS80001 RDS80002
Supply voltage range 10 to 30 Vdc
Output current (unsensed) See Figure 1 10mA
Output current (sensed) See Figure 2 2mA
Maximum output current 20mA 10mA
Operating temperature range -40 °C to 80 oC
Storage temperature range -40 °C to 85 oC
Weight 820 grams
Termination 6 m [2 x 0,75 mm2]
polyurethane cable
[1] Sensing distance Sn @ 20 oC 26,5 mm ± 4 %
[Target – 90x50x1 mm St37 steel]
Variation in Sn over ± 10 %
temperature range
Maximum switching frequency > 400 Hz
[1] The sensing distance of 26,5 mm refers to the distance achieved with
a standard steel plate target.
When installed on track this can be extend to a maximum of 35 mm as
a result of railhead bias.
Important please refer to “mounting to rail”.
WIRING DIAGRAM
BRN
BLU
LOAD
The sensor is polarity neutral - connection of both positive voltage and
negative voltage can be made to either leadwire. For RDS80001 ensure
that the load limits the maximum output current to 20 mA at all times.
Figure 1
RDS80001 Series output current with no target present
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
Load resistance (Ohm)
Load resistance (Ohm)
Supply voltage
Supply voltage
Figure 2
RDS80001 output current with target present
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Typical current output ± 10 % (mA)Typical current output ± 10 % (mA)
10 V
15 V
20 V
25 V
30 V
10 V
15 V
20 V
25 V
30 V
Output current
Wiring details
Available listings
Catalogue Listing Oscillation Frequency
RDS80001-L 160 kHz ± 10 %
RDS80001-H 230 kHz ± 10 %
RDS80002-L 160 kHz ± 10 %
RDS80002-H 230 kHz ± 10 %
Previous Railwheel Sensors
The RDS80001 is a direct replacement for the 926FS30 Series sensors
previously produced by Honeywell.
926FS30 Series listing RDS Equivalent
926FS30-060-Z911-H RDS80001-H
926FS30-060-Z911-L RDS80001-L
X
H
Warranty/remedy
Honeywell warrants goods of its manufacture as being free of defective
materials and faulty workmanship. Contact your local sales office for
warranty information. If warranted goods are returned to Honeywell
during the period of coverage, Honeywell will repair or replace without
charge those items it finds defective. The foregoing is Buyer’s sole
remedy and is in lieu of all other warranties, expressed or implied,
including those of merchantability and fitness for a particular
purpose.
1-800-537-6945 USA Europe: +45 39 55 54 03 Denmark FAX: 1-815-235-6545 USA
1-800-737-3360 Canada +44 (0)1698 481481 UK FAX: +44 (0)1698 481276 UK
1-815-235-6847 International e-mail: info.sc@honeywell.com
Honeywell Automation and Control Products
www.honeywell.com/sensing
Newhouse Industrial Estate
Motherwell, Lanarkshire ML1 5SB
Scotland, UK
PK XP-4061 Issue 1 UK07 GLO 06/02 Printed in UK on environmentally friendly paper
Copyright © Honeywell 2001. All rights reserved.
Specifications may change without notice. The information we supply is
believed to be accurate and reliable as of this printing. However, we
assume no responsibility for its use.
While we provide application assistance personally, through our
literature and the Honeywell web site, it is up to the customer to deter-
mine the suitability of the product in the application.
Mounting dimensions in mm (inches) for reference only
RDS Series
Issue 1 PK XP-4061
Dimensions H and X, the height below the rail and
distance from the rail, will vary according to the track/
wheel interface standard which applies to your
application. Please contact Honeywell for further
details.
For USA only: X = 60,0 mm (2.36 in)
H = 43,0 mm to 48,0 mm (1.69 in to 1.89 in)
Nominal setting
The sensor should be positioned such that the top
face of the sensor is 1 mm below the deepest flange
(this can be established based on data from the
relevant rail authority or by empirical testing).
The sensor side face should be approx. 1–2 mm from the innermost point
of the railhead.
If a sensor is to be mounted on a bend, it should be mounted on the
inside of the bend.
Maintenance checks
The setting of a sensor should be checked regularly based on the
particular railways requirements, the wear rate of the rails and any safety
requirement.
Mounting to rail Mounting distances
Between sensors of the same oscillating
frequency (e.g. H-H and L-L) > 0,25 m between
centrelines of sensors.
Between sensors of different oscillating
frequencies (e.g. H-L) > 0,125 m between
centrelines of sensors. This distance corresponds
to mounting the sensors as close as the enclosed
mounting brackets will allow.
Note: Mounting sensors with different oscillating
frequencies at the minimum separation distance of
0,125 m provides an overlapping of signals as the
railwheel passes.
Mounting components supplied
2 Stainless steel retainer clips
4 M5 stainless steel cap screws with 4 mm hexagonal heads
4 M5 lock washers
1 Nitrile rubber gasket (to be installed under sensor as part of shock
defence)
