INSTALLATION MANUAL
L
INEAR
D
ISPLACEMENT
T
RANSDUCERS
™
955S BRIK
Smart BRIK LDT
955 Series
Series 956
ABSOLUTE PROCESS CONTROL
KNOW WHERE YOU ARE... REGARDLESS
1080 N. Crooks Road, Clawson, MI 48017-1097 Phone 248-435-0700
Toll Free 800-635-0289 Fax 248-435-8120 www.AMETEKAPT.com
Introduction
The 955S Smart Brik is an accurate programmable,
auto-tuning, non-contact, linear displacement transducer
in an economical, low prole package. The transducer
utilizes our eld proven magnetostrictive technology
to give absolute position, repeatable to .01% of the
programmable sensing distance. The streamlined
anodized aluminum extrusion houses the sensing element
and electronics. The magnet moves over the sensing
element that determines the position and converts it to an
analog output. It can be ordered with various outputs:
0 to 10 VDC
-10 to 10 VDC
0 to 5 VDC
-5 to 5 VDC
4 to 20mA
The 955S Smart Brik has a few truly unique features. The
rst one being the LDT’s auto-tuning capability, the ability
to sense a magnet other than the standard slide magnet
and adjust its signal strength accordingly. Another feature
is the analog output is programmable over the entire
active stroke length. The active stroke area of the LDT lies
between the Null Zone and Dead Band.
Mounting
The transducer can be mounted vertically or horizontally
using SD0522000 Mounting Brackets. The mounting
brackets slide in the grooves on the lower part of
the extrusion and clamp down when tightened. It is
recommended to use one mounting bracket on each end
and every three feet between.
NOTE: If using the oating magnet option, you must
set the automatic gain control.
Ferro-magnetic material, (material readily magnetized)
should be placed no closer than .25” from the sensing
surface of the LDT.
LED Colors
Green: Magnet is present and within the active
programmed range.
Red: Fault, the LDT has lost its signal from the magnet or
the magnet has moved into the Null Zone or Dead Band.
Yellow: Magnet is out of the programmed ZERO to SPAN
range.
Setting Zero & Span Positions
There is a diagnostic LED located at the connector end of
the probe that remains green while a good magnet signal
is present and when the magnet is in the programmed
stroke area. The LED turns yellow when the magnet is
out of the programmed active range, but still within the
active stroke area. The LED turns red and the output
goes to 0 volts on voltage output units, or 4mA on current
output units when there is no magnet present or when the
magnet is out of the sensing area. The unit can easily be
changed in the eld.
From To
0 to 10 VDC 10 to 0 VDC
-10 to 10 VDC 10 to -10 VDC
0 to 5 VDC 5 to 0 VDC
-5 to 5 VDC 5 to -5 VDC
4 to 20mA 20 to 4mA
NOTE 1: As an added benet, the 955S is FM approved
for Class I, Div II, Groups A, B, C, D applications when
installed and wired per drawing E0241100.
NOTE 2: If your application does not require FM Class I,
Div II approval, wire the 955S using a standard 4 pin Euro
cordset from Ametek or others.
The Series 955S is programmable over the entire active
stroke length of the LDT. Keep in mind that there is a
3” Null area at the connector end of the LDT and a 1.5”
Dead area at the other end of the LDT that the magnet
must stay out of at all times. The diagnostic LED can
help aid you in the setup of the Zero and Span. A green
or yellow LED means that it is OK to program the LDT
in this area, a red LED means that the LDT cannot be
programmed in this area.
To set the ZERO and SPAN position for the probe follow
these steps:
1. Power up the probe in normal operating mode (i.e.
“PRGM” pin oating)
2. Place magnet assembly where ZERO is to be located,
but within the active region of probe
3. Momentarily short “PRGM” pin (pin 2) to ground (pin 3)
4. Place magnet assembly where SPAN is to be located,
but within the active region of the probe
5. Momentarily short “PRGM” pin (pin 2) to V+ (pin 1)
NOTE 1: AGC should be set rst before setting the
ZERO and SPAN positions when using a oating magnet.
NOTE 2: SPAN could also be set rst, followed by setting
the ZERO position.
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1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax 248.435.8120 • www.AMETEKAPT.com
NOTE 3: ZERO or SPAN can be adjusted individually
without setting the other.
NOTE 4: ZERO = 0V on 0 to 10 VDC units and 4mA on 4
to 20mA units.
For your convenience, Ametek offers an in-line
programming unit (955-1409) that can be installed inline with the LDT. The in-line programmer uses a rocker
switch to program the zero and span. For details, see
accessories on page 7.
Automatic Gain Control
To place the probe back into the normal operating mode
follow these steps:
1. Power down the probe
2. Remove short from “PRGM” pin
3. Apply power to the probe
The probe is now in the normal operating mode.
NOTE: The north pole of the magnet should be pointed
towards the probe.
The Automatic Gain Control feature is only used when
sensing a magnet other then the standard SD0521800
slide magnet. If you are using the standard slide magnet
skip to Setting Zero and Span Position.
When using the Floating Magnet assembly (SD0522100),
the magnet should be installed within 3/8” of the sensing
surface. The magnet assembly should also be installed
in such a manner that it remains an even distance from
the aluminum extrusion throughout the entire stroke.
Improperly installed magnets can result in output signal
non-linearity.
To set the Automatic Gain Control (AGC) level for the
probe follow these steps:
1. Place magnet assembly close to the Dead Band (but
within the active region) of the probe
2. Power down the probe
3. Short “PRGM” pin (pin 2) to ground (pin 3)
4. Apply power to probe
A. The LED ashes RED indicating it is in the AGC
mode.
B. The LED will change to ashing GREEN when it
has determined the proper AGC level and has
saved it to non-volatile memory.
NOTE: When the probe is in AGC mode, the output will
be at either 0 volts or 4mA, depending on the model that
was ordered.
The AGC is now complete.
Specications
Input Voltage 10 to 30 VDC
Current Draw
Voltage Units
Current Units
Output 0 to 10 VDC
Linearity +/- 0.05% of Stroke or +/- 0.028” whichever is
Accuracy +/- 0.1% of Stroke or +/- 0.050” whichever is
Repeatability +/- 0.01% of Full Stroke or +/- 0.014” whichever
Update Time
Stroke Length:
4” ≤ 50”
51” ≥ 100”
101” ≥ 150”
151” ≥ 180”
Operating Temperature -20° to 70° C
Span Length 4” to 180”
Null Zone 3.00”
Dead Band 1.50”
LED Green = Power is applied and magnet is present
Connector Standard 4 Pin Micro
Approvals CE
Enclosure IP67, IP68 Optional
Output Load
Voltage Output
Current Output
Specications are subject to change without notice.
Specications are based on a typical 36” LDT.
80mA @ 10 VDC
35mA @ 30 VDC
90mA @ 10 VDC
55mA @ 30 VDC
10 to 0 VDC
-10 to 10 VDC
10 to -10 VDC
greater
greater
is greater
1ms with 5ms settling time
2ms with 4ms settling time
3ms with 3ms settling time
4ms with 4ms settling time
Red = Fault, magnet is in the Dead Band or lost
Yellow = Out of the active programmed range
12mm Euro Connector
FM - When installed per drawing E0241100
1KΩ (1.5KΩ for +/- 10V) (minimum)
(Vin - 4) / 20mA (maximum)
-5 to 5 VDC
5 to -5 VDC
0 to 5 VDC
5 to 0 VDC
4 to 20mA
20 to 4mA
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax 248.435.8120 • www.AMETEKAPT.com
3
955S Wiring Connections
Once the LDT has been installed, wiring connections can
be made. There are two groups of connections you will
need to make. They are as follows:
• Power Supply Connections (including ground and
shield)
• LDT Input/Output Connections
Power Supply/Ground Connections
Wiring Diagram 955S
Euro Connector (Micro 12 mm single keyway)
Program Input
(white wire)
2
3
Ground
(blue wire)
Power 10 - 30 VDC
(brown wire)
1
4
Output
(black wire)
The 955S standard cable is a 4 Pin, 12mm, Euro Style
cordset. It has 4 conductors of 22ga, with an aluminum/
polyester/aluminum foil with drain wire. Cable O.D. is
.250. To reduce electrical noise, the shield must be
properly used. Connect the cable’s shield to the controller
system GND.
Always observe proper grounding techniques such as
single point grounding and isolating high voltage (i.e.
120/240 VAC) from low voltage (10-30 VDC cables).
Whenever possible, this cable should be run in conduit
by itself. The power supply common, the cable shield and
a good earth ground should be connected together at the
location of the power supply common.
WARNING
Do not route the BRIK output cable near high
voltage sources.
In order for the 955S to operate properly, the LDT’s
external power supply must provide a voltage between
+10 to +30 VDC. The power supply must be rated at
100mA minimum. The power supply should provide less
than 1% ripple and 10% regulations. (The power supply
should be dedicated to the LDT to prevent noise from
external loads from affecting the BRIK.)
Pin # Wire Color Function
1 Brown Customer Supplied Power
(+VDC)
2 White Program Input
3 Blue Power Supply Common
4 Black Position Output
Customer Supplied
Interface Device
+ Input
Common
Power +
Supply
_
Customer Supplied Power (Brown)
Power Supply Common
Program Input
Single Ended Input
Position Output (Black)
955S
LDT
(White)
(Blue)
NOTE: 955S-C is current sourcing, which allows the current to ow from the LDT into the user’s equipment.
4
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax 248.435.8120 • www.AMETEKAPT.com
.25
C
OF MAGNET SLUG
L
Dimensions
A standard female swivel mounting arm is
provided with the slide magnet assembly.
For extensions and other options contact the
factory.
Mounting brackets (SD0522000) slide in the grooves
on the side of the extruded housing. When tightened
down with fastening hardware the mounting brackets
clamp the unit into place. It is recommended to use
one mounting bracket on each end and every three
feet between.
S
N
Sensing Surface
Floating Magnet Assembly (SD0522100)
NOTE 1: The north pole of the magnet should be
pointed towards the probe.
NOTE 2: If using the Floating Magnet Assembly option,
you must set Automatic Gain Control. See page 3.
A standard 12 mm 4 pin micro connector is used. Straight mating cables can
be ordered in a 6’ length, or 12’ length. If space is a consideration a right angle
connector is also available.
WARNING
Do not use cord sets with LED’s
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax 248.435.8120 • www.AMETEKAPT.com
5
FM Approved for Class I, Div II
NOTE 1: As an added benet, the 955S is FM approved
for Class I, Div II, Groups A, B, C, D applications when
installed and wired per drawing E0241100.
NOTE 2: If your application does not require FM Class I,
Div II approval, wire the 955S using a standard 4 pin Euro
cordset from Ametek or others.
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1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax 248.435.8120 • www.AMETEKAPT.com
Accessories
Item Part Number
Slide Magnet SD0521800
Slide Magnet Side Adapter SD0521801
Float Magnet SD0522100
Mounting Foot SD0522000
6 Ft. Cable 949001L6
12 Ft. Cable 949001L12
6 Ft. Cable, Right Angle Connector 949002L6
12 Ft. Cable, Right Angle Connector 949002L12
Control Arm 955ARMXX (X = Inches)
In-Line Programming Unit 955-1409
Rod Ends 04-570252
FM Accessories
6 Ft. Straight Cable 949024L6
12 Ft. Straight Cable 949024L12
Connector Lock 04-521570
NOTE: FM approved cordset and connector lock must be used and
installed per drawing E0241100 when installing the 955S in Class I
Div II, Group A, B, C, D applications.
Control Arm P/N 955ARMXX
Float Magnet P/N SD0522100
Slide Magnet
P/N SD0521800
Slide Magnet
Side Adapter P/N
SD0521801
In-Line Programming Unit P/N 955-1409
Rod Ends P/N 04-570252
Part Numbering
955S XX XXXX
955S
Smart BRIK
Output
V0 = 0 to 10 VDC
V1 = 10 to 0 VDC
V2 = -10 to 10 VDC
V3 = 10 to -10 VDC
V4 = 0 to 5 VDC
V5 = 5 to 0 VD
V6 = -5 to 5 VDC
V7 = 5 to -5 VDC
C2 = 20 to 4mA
C4 = 4 to 20mA
Stroke Length
Insert stroke length to 0.1 inch. Enter
as a four-place number. Example: 12.0”
stroke is entered as 0120.
OR
Insert stroke length in millimeters to
1mm. Enter as a four-place number
followed by”M”. Example: 305mm stroke
is entered as 0305M.
Mounting Foot P/N SD0522000
Options
Leave blank for no options.
E = Wet environment. Electronics
sealed to IP 68 Rating.
1080 N. Crooks Road • Clawson, MI 48017 • 800.635.0289 • 248.435.0700 • Fax 248.435.8120 • www.AMETEKAPT.com
7
Other Products
Copyright 2010 by AMETEK AUTOMATION & PROCESS TECHNOLOGIES. All Rights Reserved. Made in the USA.
1080 N. Crooks Road, Clawson, MI 48017-1097
Phone: 248.435.0700 Toll Free: 800.635.0289
Fax: 248.435.8120 www.ametekapt.com
955S.M4R
9/11.Z141
1M
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