Memorex RX 1 Smart Manual de Instalação descarregar pdf (Página 199)

198 | Simrad MX500

MX500 CDU Inputs and Outputs:

The input and output circuits of the serial interfaces meet

the requirements of:

IEC 61162-1 including the requirements of ITU-T V.11. •

NMEA 0183 version 1.5, 2.0, 2.1, 2.2 & 2.3 •

NMEA talker (all outputs):

Levels: Maximum ±6 volt, minimum ±2 volt, A out rela-

tive to B out

Current: Minimum 15mA

Protection: -1 volt to +6 volt, output relative to shield,

±50 volt, output relative to external power lines

NMEA listeners (all inputs):

Insulation: Opto-coupler. Maximum ±50 volt, input rela-

tive to shield or power supply lines

Impedance: Minimum 500 Ohms, A- in relative to B- in

Threshold: Maximum 2 volt and 2 mA

Protection: ±15 volt, A- in relative to B- in, ±50 volt

MOB/ Event input

Insulation: Maximum ±50 volt, input relative to power

supply lines

Impedance: 3.5 kOhm input relative to Reference GND

Pull-up: 15 kOhm to internal 12 volt

Threshold: Positive going maximum 2.3 volt, input rela-

tive to Reference GND

Negative going minimum 0.6 volt, input relative to

Reference GND

Hysteresis minimum 0.6 volt

Protection: ±25 volt, input relative to shield

±50 volt, input relative to external power lines

Frequency: Triggered with 50 mS bounce control

Pulse width: Minimum 100 mS

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Memorex RX 1 Smart Manual de Instalação Página 199