
© 2021 Active Research Limited
Intelligent Type Approved NMEA Buffer - PRO-BUF-2
© 2021 Active Research Limited
Page 14 Page 15
LED and Behaviour If LED is not lit, or different behaviour than expected
Serial Talker (Amber ‘OUT’) LED &
Listener (Green ‘IN’) LED
As described above for ‘Talker Out’ and
‘Listener In’ LEDs.
As described above for ‘Talker Out’ and ‘Listener In’ LEDs.
Ethernet (Green & Amber ‘ETHERNET’)
LEDs
Green LED ashes to indicate data
activity.
Yellow LED indicates line speed: off =
10 Mbps, on = 100 Mbps. Determined
by the Ethernet switch/PC connected –
will be 100 Mbps by default.
• Ensure that the Ethernet cable is connected to an Ethernet switch or a
PC.
• Ensure the PC/Ethernet switch is powered and operating normally.
Status LED
Green ashing / solid LED indicates
device is operating correctly
• If LED is not lit, ensure that the PRO-BUF-2 has power, refer to Power
(Blue ‘PWR’) LED above.
• Yellow LED indicates the buffer is lling, but duplication deletion is
managing to keep load under max capacity.
• Red LED indicates buffer is in overload condition, where too much data is
being received, causing sentences to be dropped.
• Review web conguration of device to understand where the overloads
are happening, and correct overload condition by adjusting conguration.
Alarm (Red ‘Alarm’) LED
Indicates whether the alarm condition has been triggered.
• LED will light if Alarm condition has been met.
Mode LED (Green ‘Mode’)
Pulsing, or the number of ashes equates to the Mode number. Refer to the ‘Mode Table’ sheet included with the
PRO-BUF-2 or available from the PRO-BUF-2 ‘Downloads’ page on the Actisense website.
• If the LED is pulsing, this indicates a User Dened Mode has been selected
• If the LED is ashing, the number of ashes indicates the operating mode number selected according to the Mode
Pins. (refer to Mode Table).
Technical Support and Returns Procedure
All installation instructions and any warnings contained in this manual must be followed before contacting Actisense
technical support. If the troubleshooting guide did not help resolve the problem and an error persists, please contact
Actisense Technical Support to help trace the issue before considering the return of the product.
If the Actisense support engineer concludes that the PRO-BUF-2 unit should be returned to Actisense, a
‘Return Merchandise Authorisation’ (RMA) number will be issued by the support engineer.
The RMA number must be clearly visible on both the external packaging and any documentation returned with the
product. Any returns sent without an RMA Number will incur a delay in being processed and a possible charge. Any
cables originally supplied with the product are to be included in the returned box.
Technical Specication
All specications are taken with reference to an ambient temperature of 25°C
unless otherwise specied.
Part Number Description
PRO-BUF-2 2 OPTO input, 12 ISO-Drive outputs
professional Type Approved Buffer
Accessory Description
DIN-KIT-1 Kit of 2 clips & 4 screws. Use with top hat
(EN 50 022) or G section (EN 50 035) rails
A-CONPACK-PBUF2 Pluggable Screwless Terminal pack for
PRO-BUF-2
SRB-90 Kit of 2 x 90mm Stainless Steel Strain
Relief Brackets
USBKIT-PRO USB To Serial Adapter for use with PRO
range products
Power Supply
Input Supply Voltage 10 to 35 V DC
Input Supply Current 325mA max @ 12V DC (all outputs @
full drive into 100 ohm loads)
Input Protection Continuous reverse polarity, transient
overvoltage and ESD protection
Power Indicator LED, Blue - indicates unit is functioning
correctly
Input Supply Connector Pluggable 2-way screw terminal,
5.08mm pitch (12 to 30 AWG)
NMEA 0183 Port - Listener & Talker
Number of Listener / Input
Ports 2 isolated NMEA 0183 Listeners
Number of Talker / Output
Ports 12 isolated NMEA 0183 Talkers
Compatibility Fully NMEA 0183, RS422 & RS232
compatible. RS485 Listener compatible
Speed / baud rate 4800 to 38400 bps
Talker Output Voltage Drive >= 2.2V (differential) into 100 ohm
Talker Output Current Drive 20 mA maximum per output
Talker Output Protection Short circuit and ESD
Talker Data Indicator LED, Orange (Flashes at data rate)
Listener Input Voltage
Tolerance
-15 V to +15 V continuous, -35 V to +35
V short term (< 1 second)
Listener Input Protection Current limited, overdrive protection to
40 VDC and ESD protection
Listener Data Indicator LED, Green (Flashes to indicate valid
input)
Connectors
Pluggable 2/3-way screw terminals,
5.08mm pitch (12 to 30 AWG)
Serial Port
Compatibility RS422 & RS232 compatible. RS485
Listener compatible
Speed / baud rate 4800 to 115200 bps
Output Voltage Drive >= 2.1V (differential) into 100 ohm
Output Current Drive 20 mA max.
Output Protection Short circuit and ESD
Input Voltage Tolerance -15 V to +15 V continuous, -35 V to +35
V short term (< 1 second)
Input Protection Current limited, overdrive protection to
40 VDC and ESD protection
Data Indicators LED’s: Green = Receive, Orange =
Transmit
Connectors
Pluggable 3-way screw terminals,
5.08mm pitch (12 to 30 AWG)
Ethernet Port
Host Interface 10/100BaseT, automatic polarity
detection
Supported Protocols
TCP/IP for conguration and rmware
updating
TCP/IP and UDP for NMEA 0183
comms
Indicators Green = Link/Activity, Yellow = 100
Mbps
Connector RJ45
Isolation
NMEA 0183 Listener OPTO-Isolated, Hi-Pot tested to 1000V
NMEA 0183 Talker Uses IsoDrive™, Hi-Pot tested to 1000V
Serial Port Uses IsoDrive™, Hi-Pot tested to 1000V
Alarm Relay Hi-Pot tested to 1000V
Ethernet Port 2kV for 60s
Mode Inputs
Input Voltage Range 0 to 35V DC
Protection Transient overvoltage and ESD
protection
Connectors
Pluggable 2-way screw terminals,
5.08mm pitch (12 to 30 AWG)
Alarm Output
Contacts Common, Normally Open and Normally
Closed
Alarm Indicator LED, Red indicates a valid alarm
condition
Contact Ratings 35VAC / 50VDC
Connectors
Pluggable 3-way screw terminals,
5.08mm pitch (12 to 30 AWG)
Mechanical
Housing Material 316 Stainless Steel
Dimensions 210mm (W) x 128mm (H) x 27mm (D)
Weight 530g
Mounting Bulkhead mount or DIN rail mount (DIN
kit 1)
Approvals and Certications
EMC IEC 60945:2002-08, DNVGL-
CG-0339:2019 & IACS UR E10 Rev7
Compass Safe Distance 750mm
Type Approval Certicate RINA
Operating Temperature -25 to +70°C
Storage Temperature -40 to +85°C
Relative Humidity (RH) 95% @ 55°C
Environmental Protection IP40
Guarantee 5 Years