SIGNAL INTERFACE

HEHDT Simulator

Heading-sentence simulator that generates NMEA 0183 $HEHDT heading data on a 1000 VDC isolated 4800 bps RS-422 output for testing and commissioning heading repeaters and bridge instruments.

✓Generates $HEHDT heading sentences✓4800 bps isolated RS-422 output✓1000 VDC galvanic isolation✓LED heading-value indication

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// PRODUCT SHOT — PM325

Technical specification

Model	PM325
Product Type	Heading Data Simulation Unit ($HEHDT)
Output Ports	1 × RS-422 Output
Output Baud Rate	4800 bps
Supported Sentences	$HEHDT
Input Voltage	9–36 VDC
Power Consumption	30 mA (Min), 140 mA (Max)
Isolation Level	1000 VDC
Reverse Polarity Protection	Supported
Enclosure Material	ABS (UL94 HB Flame Retardant)
Installation Type	Flange Panel Mount
LED Display	Heading Value Indication

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