Specialising in Technical Consulting and Systems Sales
in the CCTV and Security Industries.

T Q E Your Technologies Guide.

Specialising in Evaluation Reports, Commissioning and Maintenance of Technologies for your security and comfort.

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1 . Rs422 1st Line Protector Provides 1st level overvoltage protection to RS 422 Data lines against surges. With differential mode protection . This unit provides a shunt path to ground to any surges. This is an in line device providing easy installation and fault analysis.

Tx+ Tx- Rx+ Rx-

Pins 4 ,8,5, 9

N.B. For larger orders, other pin out configurations can be provided.

Model = 1st line 422

2 . RS422/232 1st Line Protector Provides 1st level overvoltage protection to RS 422 an RS232 Data lines against surges. With differential mode protection as well as common mode protection for the RS422 Lines. This unit provides a shunt path to ground to any surges. This is an in line device providing easy installation and fault analysis.

Tx+ Tx- Rx+ Rx- Gnd

RS422 Pins 4, 8, 5, 9

RS232 Pins 2, 3, 5

N.B. For larger orders, other pin out configurations can be provided.

Model = 1st line 422/232

3 . Video Transient Barriers Provides protection to video lines by providing a shunt path to ground for surges on video coax lines.

Model = VTP1VC (GA5K60012)

4 . RS422 DOI V2 Provides transient barrier for RS422 Data lines. This is an economical alternative to Fibre optic where input and output Data is opto isolated . Giving the isolation required on many difficult installation , with common mode and differential mode protection of lines against transients. Also can be used as a buffer or repeater for long distance or difficult installations.

Tx+ Tx- Rx+ Rx-

Pins 4, 8, 5, 9

N.B. For larger orders, other pin out configurations can be provided.

Model = 422DOIV2

5 . RS 485 DOI As per the 422DOIV2 this unit provides protection for RS485 data. Factory set for communication of 4800 baud , by internal selection can be set up for other baud rates.

See 422DOIV2 for photo equivalent view

Model = 485DOI

6 . Mains Transient Barriers This unit provides a barrier to surges , just plug the equipment in and any surge will have three levels of protection. Common mode protection for any surge between active and ground or neutral and ground, Differential mode protection for any surge between active and neutral as well as fuse protection of both lines.

Model = 240MPT

7 . Camera Physical Isolation Kit This kit comprising of a nylon bolt and washer is recommended on all camera installations to provide isolation between video ground and chassis ground, the cause of many hum bars.

Model = CPIK1

N.B. Lightning can never be absolutely guaranteed not to cause damage, the severity of lightning before causing damage can be improved. Only a systematic approach to providing protection from lightning strikes, appropriate measures to protect against indirect effects and correct earthing practices can provide an overall solution.

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Last updated 7 April, 2000