Fire Alarm Filters

GF58270-21

Digital Fire Alarm/Data Filter

The Genisco Digital Fire Alarm and Data filters are low-pass Electromagnetic Interference and Radio Frequency Interference filters (EMI & RFI) designed to block high-frequency noise that interferes with the operation of sensitive electrical equipment.

These high performance filters are for both DC and AC applications including:

  • Digital Fire Alarm
  • Data

These standalone filters are built with a gasketed 1” NPSM pipe to penetrate into a shielded environment (shielded rooms, screen rooms, SCIFs, secure environments, etc.), to maintain emission integrity.

Analog vs. Digital Filter Applications

Analog communication filters are generally used when a system is composed of only analog equipment. If any part of the system contains digital equipment, a digital filter may be required, as most digital systems have ground fault equipment that can be tripped by a filter on the circuit. A digital filter with a higher pass-band frequency may prevent false ground fault triggers.

Download Product Data Sheet:  GF58270-21 Data Sheet


 

SPECIAL FEATURES

 Filters

  • Factory pre-wired clean output leads provided through the pipe penetration
  • Low Pass filter circuits ~ passive components which includes inductors,capacitors, resistors and optional transient suppression devices
  • Manufactured and tested per applicable portions of MIL-PRF-15733
  • All circuits provided in single enclosure

Enclosure

  • Fabricated case of not less than 18 gauge cold rolled steel electro plated or painted Gray (Std. Paint Color)
  • Sealed with welded and soldered seams for minimum shielding effectiveness 100 dB, 14 kHz to 18 GHz
  • Threaded steel pipe penetration
  • Triple knock outs provided on filter case input
  • Front cover access to input terminals
  • Mounting tab provided for easy wall mount options
ADDITIONAL OPTIONS
  • Surge Suppressors
  • Alternate pipe penetration locations on the enclosure available by request.
  • Custom Paint Colors (Enclosure)
  • RF Secure Penetration Accessories
FUNCTIONAL CHARACTERISTICS

 

Part
Number
Typical Application Imp L-L
(ohms)
Imp L-G
(ohms)
Voltage
max
Current
max (amps)
DC Resistance (ohms) Pass-Band
(kHz)
Insertion
Loss
Test
Frequency*
GF58270-21 fire/data
(56000 Baud)
 600  300 400 Vdc
125 Vac
 1.0  ≤ 1  0-140  ≥ 100 dB 1 MHz-
10 GHz

*per MIL-STD-220 

Voltage Ratings

  • 24-400 VDC
  • 125 VAC (50/60 Hz)

 Temperature Rating

  • MIL-PRF-15733

 Current Overload

  • 140% maximum current rating

 RF Radiation

  • Greater than 100 dB isolation

 Dielectric With-Standing Voltage

  • 1,000 VDC (prior to installation of discharge resistors)

 Insulation Resistance

  • MIL-PRF-15733
APPLICABLE SPECIFICATIONS

 Military Specifications

  • MIL-PRF-15733 General

Military Test Methods

  • MIL-STD-202 Component Parts
  • MIL-STD-220 Insertion Loss
  • MIL-STD-285 Shielding Effectiveness
  • NFPA 70/2011 National Electrical Code Standards