Simrad MX512 - Page 146

144 | Technical specications
NMEA listeners (all inputs):
Insulation: Opto-coupler. Maximum ±50 volt, input relative 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
LAN
Protocol: NMEA over TCP/IP, MX proprietary messages
Connector: RJ-45
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 relative 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
Alarm output
Dry Contact: Normally Open, when not in Alarm state, or after acknowledgement.
Closed to Ref. GND, when in Alarm On state.
Antenna voltage output
DC voltage: 12 VDC, +1.0 VDC loaded; (11.5 VDC nominal unloaded)
DC current: 500 mA @ 12.0 volt DC
Speed Log Pulse Input/output
DC voltage: 0-12 VDC, pulses
Number of pulses: 100-500 selectable