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 SRA-6LC
Series
Vehicle Loop Detector
The SRA6LC Series are three terminal devices, two of which
are connected across the signal inputs of the detector for differential
mode protection, and the third is grounded to protect against common
mode damage.
This unit addresses over voltage transients on both Common and
Differential modes with state-of-the-art silicon breakover devices.
The SRA6LC Series is intended for
all popular makes of loop detectors presently on the market.
| SPECIFICATIONS |
| Peak Surge Current: |
| 8x20µs
(Differential Mode) |
400
Amps |
| 8x20µs
(Common Mode) |
1000
Amps |
| Life Expectancy
(Occurrences): |
| 8x20µs
(200A) |
500 (Typ) |
| 10x700µs
(100A) |
100
(Typ)t |
| Response Time |
<
5 ns |
| Input Capacitance
|
35pf |
| Clamping Voltage
(After Breakover) |
<
25V |
| Breakover Voltage
|
150V
(typ.) |
| Operating Temperature
|
–40°C
to +85°C |
| Weight |
3
oz. |
| Dimensions: |
| SRA6LC
|
1.2"
Square cube |
| SRA6LC
W/LEADS |
1.2"
Square cube |
| Mounting: |
| SRA6LCA-716 |
7/16"
Terminal Strip Spacing |
| SRA6LCA-916 |
9/16"
Terminal Strip Spacing |
| SRA6LCB |
9/16"
Terminal Strip Spacing |
| SRA6LCBLL |
9/16"
Terminal Strip Spacing |
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| FEATURES |
| • Lightning
Protection for Vehicle Loop Detectors |
| · Solid State
Protection |
| · Differential
Protection |
| · Common-Mode
Protection |
| · Automatic
Recovery |
| · Fast Response
Time |
| · Compatible
with Digital Detectors |
| · Epoxy Encapsulated |
| · Years of
Dependable Service |
| · Easily
Installs |
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| ORDERING
INFO |
| SRA6LC |
Cube,
2 leads + stud |
| SRA6LC
W/LEADS |
Cube,
3 leads/no stud |
| SRA6LCA-716 |
3 Spaded
Term. Block 7/16 Spacing |
| SRA6LCA-916 |
3
Spaded Term. Block 9/16 Spacing |
| SRA6LCB |
2 Spaded
Term. Block w/ 3.5" Gnd Wire |
| SRA6LCBLL |
2
Spaded Term. Block w/ 11" Gnd Wire |
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| INSTALLATION |
General:
Units are installed as close as practical to the point
where the detector loop wires enter the controller cabinet.
Connect one of the leads to each loop. The common (either
the bolt, green wire or center clip) connection must be
connected to earth ground. Best performance is obtained
by: (1) shortening the leads as much as possible, and
(2) providing the lowest impedance to ground.
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| The SRA6LCA
slips under the equipment-side screws of the terminal
strip. The protector ground is the center spade of the
3 spade terminations. The terminal strip must jumper this
corresponding position to ground. Protectors can be mounted
consecutively along the terminal strip.
One SRA6LCA is used
on each loop detector circuit to be protected.
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| The SRA6LCB
slips under the equipment-side screws of the terminal
strip. The protector ground wire must be bonded in a short,
direct manner to the cabinet power ground. Protectors
can be mounted consecutively along the terminal strip.
One SRA6LCB is used
on each loop detector circuit to be protected.
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| The SRA6LC
has mounting brackets available for installing multiple
units in the controller cabinet. The brackets are capable
of mounting four or eight devices in-line.
One SRA6LC is used
on each loop detector circuit to be protected.
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| CAUTION:
Installation and service should be performed by qualified
technicians or service personnel. |
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