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Video Transmission

Accessories Video Transmission

7-4 © Siemens Building Technologies Group

Type Order No.

RS232-RS485

Converter RS232 to RS485

Converts RS232 interface signals to RS485 interface signals.

Weight 0.40 kg

2GF5505-8AH

RS232-TTY

Converter RS232 to TTY

Converts RS232 interface signals to TTY interface signals.

Weight 0.37 kg

2GF5505-8AG

VGI200

Video Isolation Transformer

The VGI200 video isolation transformer breaks ground loops‚ only

allowing video and camera control signals through. Ground loops occur

when the earth potential at the camera is different from the potential

at the monitor. This difference may only be a small voltage but it can

cause large currents to flow through the shield of the coaxial cable.

These large currents will cause picture distortion and safety problems if

they remain.

Connections 2 x BNC‚ in and out

Impedance 75 Ohm

Housing Plastic

Weight 0.227 kg

GBQ:A5573460001

VT/75

VT/75-75 Video Transformer 75R

Achieves groundloop isolation on a video cable‚ i.e. removes earth

loops. VT75-75 D 75 ohm coax in / 75 ohm coax out. Compatible with

‘C’ type telemetry.

Dimensions (H x W x D) 41 x 32 x 90 mm

Weight 0.20 kg

BPZ:80-236

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Siemens CRT Manual do Utilizador Página 126