NUOVA MAREA NM-251A DATA CONVERTER RS-232

NUOVA MAREA NM-251A DATA CONVERTER RS-232 (NEW OPEN BOX)

NUOVA MAREA LTD

MODEL NO: NM-251A

DATA CONVERTER RS-232

FIRMWARE: VER.1.00

PRODUCT DESCRIPTION:

THE NM-251A ACQUIRES NMEA-0183 SENTENCES FROM THE MOST SIGNIFICANT INPUT AND IMMEDIATELY SENDS THEM TO THE GENERAL PURPOSE OUTPUTS AND THE RS-232 OUTPUT. A WATCHDOG TIMER ROUTINE SUPERVISES IF THE NMEA SIGNALS ARE CORRECTLY APPLIED IN THE PRIMARY INPUT AND SWITCHES TO THE SECONDARY INPUT WHENEVER THERE IS NO NMEA SENTENCE FOR AT LEAST EIGHT SECONDS. IN THIS CASE THE SECONDARY INPUT STARTS RECEIVING DATA IF THERE IS AN INSTRUMENT ATTACHED. IF NOT, THE DEVICE AUTOMATICALLY RETURNS TO THE PRIMARY INPUT AFTER EIGHT SECONDS. WHEN THE SECONDARY INPUT IS ALREADY IN RECEIVING MODE AND AN NMEA SIGNAL IS APPLIED TO THE PRIMARY PORT, THE DEVICE IMMEDIATELY SWITCHES TO THE PRIMARY INPUT. IN THE CASE THAT NO SIGNAL IS APPLIED TO ANY INPUT, THE DEVICE “CIRCLES” AROUND SAMPLING THE TWO LISTENER PORTS EVERY EIGHT SECONDS UNTIL AN NMEA-0183 SIGNAL APPEARS TO ANY OF THE TWO LISTENER PORTS. IN ADDITION THE NM-251A CAN DELIVER AT THE SAME TIME DIFFERENT NMEA SIGNALS CONNECTED TO INA AND INB TO OUTPUT PORTS OUT1/2 AND OUT3/4 RESPECTIVELY. TO SELECT THIS FUNCTION USER SHOULD TURN THE SW-1 TO ON POSITION AT THE DIP SWITCH ARRAY SW1 (SEE FIGURE 4) LOCATED INSIDE THE NM-251A. IN THIS MODE THE USER CAN SELECT FROM WHICH INPUT PORT SIGNALS WILL BE DELIVERED TO RS232 INTERFACE BY SETTING SW-2 TO “OFF” POSITION FOR INA OR “ON” FOR INB. 

REF.NO: FKM9915