Actisense NMEA 0183 Bedienungsanleitung PDF herunterladen (Seite 37)

NMEA Data Multiplexer - NDC-4-A & NDC-4-A -USB

Specications

The NDC-4 ISO-Drive output is a very exible output that is RS485, RS232, RS422 and NMEA 0183 compatible.

Parameter Conditions Min. Max. Unit

Supply

Supply voltage External power supply 8 35 V

Supply current from external source

(see note 1)

Supply voltage = 12v 30 40 mA

Supply voltage = 24v 15 20 mA

Supply voltage USB powered 4.75 5.25 V

Supply current from USB (see note 1) Supply voltage = 5v 67 75 mA

Opto-isolated Flexible Input

Input voltage between +/-

Logical ‘1’/stop bit -15.0 0.5 V

Logical ‘0’/start bit 4.0 15.0 V

Input current

Maximum is under +35v overload

condition, Min @ 2.0v input level

1.6 9.0 mA

Differential input voltage

Required level for NMEA to be

detected

1.8 2.0 V

Galvanic isolation Between input & output 2500 V

Overdrive protection 40 V

Input Baud rate 4800 57600 bps

ISO-Drive Flexible Output

Output voltage between ISO Out +/A and

ISO Out -/B (under no load)

Logical ‘1’ -4.6 -5.0 V

Logical ‘0’ 4.6 5.0 V

Output current at max load of 100 ohm

At maximum load, differential drive

voltage reduces to 2.1v

- 21 mA

Output short circuit current (note 2) Due to short circuit protection 50 55 mA

Galvanic isolation From Opto-input and (USB) ground 1500 V

Output Baud rate 115200 bps

Data propagation delay Under no-overload conditions 1.0 100 ms

General

Ambient temperature -20 +70 °C

Table 2 – NDC-4 specications

All specications are taken with reference to an ambient temperature (T

) of +25°C.

Note:

1. Current consumption measured under no-load conditions.

2. Short circuit may be applied indenitely. The ISO-Drive output may be short-circuited directly to a 30 volt battery

supply without damage. A maximum current of 50mA will ow due to “polyfuse” auto-resetting fuse technology

being used in each output.

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