Technical data

8Factorysettings

CamTel

svr

Appendix A, Interface specifications

The table below contains an overview of the most  important features of

interfacesRS-232andRS-485interfaces.

Note: As technical properties of serial interface components vary,

transmission rate and line length data provided here constitute maximum

limits.

Function RS-232/V. 2 4 RS-485

Transmissiontype asymmetrical symmetrical

Minimum number of

wires

Unidirectional2,

(bidirectional3)

Bidirectional2;

Systemresponsesare

notbeprocessed

Maximum number of

receivers (transmitter

andreceiver)

232

Distance between first

andlastdevice

15m1,200m

Terminatingresistors no yes

Max.transmissionrate 115,200Bit/s 10MBit/s

Transmitterpermitted

driveroutputvoltage

±25V-7..12V

Driver output signal

withoutload

±15V±6V

Driver output signal

withload

±15V±2V

Driverload 3..7KOhm 54Ohm

Receiverinputvoltage ±15V-7..12V

Sensitivity ±3V±200mV

Inputresistance 3..7KOhm 12KOhm