| |
FAQ
Sensors
Discs and Wraps
What is the standard cable used on my hall-effect
sensor?
3-conductor, Shielded, PVC jacketed, 22-gauge wire.
 กก
What
type of cable should I use?
Electro-Sensors uses and recommends a high-quality 22
AWG audio signal cable.
- For 2 conductor cable use
a Belden 8761, or equivalent, shielded cable.
- For 3 conductor cable use
a Belden 8771, or equivalent, shielded cable.
- For 4 conductor cable use
a Belden 8723, or equivalent, shielded cable.
- For 6 conductor cable use
a Belden 9260, or equivalent, shielded cable.
What are the standard
cable lengths available from the factory?
Sensors are available with 10', 50', 100', and multiples
of 100' of cable.
How
far can I run my sensor cable wire?
The standard cable length on most Electro-Sensors' sensors
is 10 feet, however, our standard Hall-Effect Sensors
can be mounted up to 1500 feet away from one of our
meters or modules when using a quality cable.
What
is each of the wires on my sensor for?
| |
ESI
906/907
|
ESI
Prox
|
ESI
Other
|
|
Common
|
Clear/White
|
Blue
|
Black
|
|
Supply
|
Red
|
Brown
|
Red
|
|
Signal
A
|
Black
|
Black
|
Clear/White
|
|
Signal
B*
|
Green
|
N/A
|
Green
|
*Present in bi-directional versions only
What
type of Output does my sensor give?
Electro-Sensors standard Hall-Effect Sensors give a
NPN Open Collector, current sinking output. The output
is a digital square wave alternating from zero to supply
voltage.
What
value pull-up resistor should I use with an ESI sensor?
All Electro-Sensors' products have an internal pull-up
resistor. However, if you are sending the pulses to
a device without one, you will need to supply one. A
suitable pull-up resistor can be anywhere from a 1 K-ohm
- 3.3 K-ohms, however, be sure not to exceed 25mA on
the sensor.
What
is the maximum working voltage and current my sensor
can handle?
Electro-Sensors' hall-effect sensors can work up to
24Vdc at 25mA maximum. However, we strongly recommend
an operating current of less than 20mA.
Do
I need a separate DC power supply to power the Hall-Effect
Sensor?
When using the sensor with an Electro-Sensors product
(Speed Switch, Tachometer, etc.) no separate power supply
is needed. Those products have a built in supply to
power the sensor. If not using with an Electro-Sensors
product, check the specifications of that product.
Can
my sensor be used with an Intrinsically Safe Barrier?
Yes, Electro-Sensors' Hall-Effect, MagnetoResistive,
and Ring-Kit Sensors meet the requirements of intrinsically
safe apparatus and associated apparatus for use in Class
I, II, and III; Division I hazardous (classified) locations.
ANSI/UL 913-1988 - Category 16
How
do I test my sensor to make sure it is working properly?
- Electro-Sensors' analog
sensors (Models 916, 917) can be tested by disconnecting
the sensor from the electronics, and connecting an
ohmmeter to the black and clear wires. A properly
working sensor would have an ohm reading of approximately
10,000 ohms. Otherwise, contact the factory for details.
- Electro-Sensors' standard
Hall-Effect Sensors (Models 906, 907, 931, 932, 933,
1101, 1102, 1201, and 1202) require an electrical
test. Please contact the factory for details.
What are the ratings on your sensors?
- Models 906,932 = NEMA 4
- Model 907 = Class I, Group
D; Class II, Groups E,F,G; Class III
- Models 931,933 = Class I,
Groups C,D; Class II, Groups E,F,G; Class III
- Models M100/M5000 = Class
I, Group D; Class II, Groups E,F,G; Class III
- Models SCP1000/SCP2000 =
NEMA 1,3,4,7,9,12,13 - Class I, Group D; Class II,
Groups E,F,G
What tools will I need
when installing an end-of-shaft mounted pulser disc?
A No. 21 drill bit, drilled to a depth of .5",
and a tap for a 10/32 UNF screw.
Can
I bore out my magnet disc? How much?
The standard #255 nylon pulser disc can be bored up
to ½" diameter. For larger bore requirements
or other pulser discs, please contact the factory.
The
end of the shaft I want to monitor is not available
to get at. What other options do I have for mounting
a magnetic target?
A custom manufactured Pulser wrap that clamps around
the shaft that you want to monitor.
What
materials can I have my pulser wrap manufactured out
of?
PVC, Aluminum, and Stainless Steel.
What
information do I need to specify a pulser wrap?
- Exact shaft diameter
- Maximum RPM of the shaft
- Maximum temperature the wrap
will encounter
- Any corrosive chemicals or
solvents present
- Any space restrictions.
What is the maximum number of magnets I can fit
on a pulser wrap?
The standard number of magnets on all Electro-Sensors'
pulser wraps is 16. However, depending on the outside
diameter of a pulser wrap, more magnets may be able
to be added. See the following equations or consult
the factory for more details.
For 1/2" magnets:
Max # of magnets = (Wrap OD - .5)*3.14/.65
For 1/4" magnets:
Max # of magnets = (Wrap OD - .5)*3.14/.35
Where OD = Outside Diameter
Please Note: an even # of magnets is always needed
How
many pulses per revolution does my sensor/disc give?
With a standard Electro-Sensors Hall-Effect Sensor,
you will get 1 pulse for every 2 magnets (made with
magnets alternating in polarity). With an Electro-Sensors
MagnetoResistive Sensor, you will get 1 pulse for every
1 magnet. Our standard #255 pulser disc has 16 magnets
alternating in polarity.
|
