Edco SRA16C-1 Installation Manual (IO-50155)

Surge Protection
For Business-Critical ContinuityTM
Edco™ SRA16C-1
Vehicle Loop Detection
The Edco SRA16C-1 is a three terminal device, 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.
Differential mode surges (induced voltage across the loop detector input
terminals) are instantly clamped by a semiconductor array. The array is designed
to appear as very low capacitance to the detector.
Common mode surges (induced voltage between the loop leads & ground) are
handled by a rugged three-element gas discharge tube which operates (fires) at
90 VDC and thereafter clamps the two loop leads to 30 volts in respect to
ground. This design eliminates any ground noise from entering the loop
detector and being amplified. The Edco SRA16C-1 is intended for all current
detector models on the market.
Edco SRA16C-1
General Technical Specifications
Features
Maximum Operating Voltage
75 VDC
Clamping Voltage
90 VDC
Peak Surge Current
Compatible with Digital Detectors
47-63 Hz
SPD Technology
5 Year Warranty
GDT
Wire Leads, #18 AWG, 8.0”, Minimum Out of Case
Operating Temperature
Note:
The Edco SRA16C-1WLEADS (special order) is
installed very similar to the standard unit except
the common (bolt) is replaced with
a green wire.
-40˚C to + 85˚C
Dimensions (Inches)
Mounting
Rugged Gas Tube Protection
10 kA
Operating Frequency
Connection Type
Edco SRA16C-1WLEADS
1”Sq., Ht. 2” Max.
No. 10 - 32 x 3/8” Stud, (Standard Model Only)
Weight
3 oz.
Installation
One Edco SRA16C-1 is used for each loop detector to be protected.
Units are installed as close as practical to the point where the detector loop wires enter the controller cabinet. Connect one of
the flexible leads to each end of the loop. The common (bolt) connection on each Edco SRA16C-1 must be connected to earth
ground.
Best performance is obtained by (1) shortening the flexible leads as much as possible, and (2) providing the lowest possible
impedance to ground.
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IO-50155 5/11 Rev. 0
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logo are trademarks and service marks of Emerson Electric Co. ©2011 Emerson Electric Co.
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