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Noland Engineering XP15 Manual

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DESCRIPTION: The XP15 Expander is an advanced version of its predecessor (XP14)

with an additional output, a bicolor status LED and more short circuit protection on the

outputs. It enables NMEA 0183 talkers to drive multiple listeners . It provides a single

opto-isolated input and four independent differential RS-422 outputs plus a fifth RS-232

output for driving single-ended listeners such as PC's. Although intended for 4800 baud

operation, it will also operate at 9600 baud.

Many marine instruments, although compliant with the NMEA 0183 specification, do not

provide sufficient drive capability for multiple listeners. To overcome this, the XP15 has

five outputs, each of which can drive multiple listeners if needed. All outputs are isolated

from each other, so that shorting one will not affect the others.

The XP15 can operate on any DC voltage from 10-30 Vdc. A bicolor LED on the unit

flashes green when input data is detected, but will turn red or yellow if a supply current

MANUAL

MODEL XP15

NMEA 0183 Expander

Page 1 The XP15 can operate on any DC voltage from 10-30 Vdc. A bicolor LED on the unit flashes green when input data is detected, but will turn red or yellow if a supply current...
Page 2 “Data In” or leave the OUT– disconnected from those listeners. (See figure next page.) An LED is included on the XP15 to aid in installation and troubleshooting. Whenever input data is detected, the LED will momentarily flash green. A yellow LED usually occurs when too many outputs are connected.
Page 3 XP15 outputs one at a time, while observing that the LED never turns red. If one or more of the listeners causes the red LED to turn on, it is probably because that minus (-) listener input is actually grounded. In this case, you can either use the RS-232 output to drive that listener or leave the minus (-) input to that listener disconnected from the XP15.
Page 4 NoLand Engineering Inc 728 E Lincoln Ave Suite 3 Melbourne, FL 32901 Tel: (321) 951 –7329 Fax: (321) 951-8773 http://www.nolandeng.com email: info@ nolandeng.com...