Doc# E145701 8-1
8: Using the Shark® 50B Meter
Electro Industries/GaugeTech
™
8: Using the Shark
®
50B Meter
8.1: Introduction
The Shark® 50B power meter communicates BACnet MS/TP protocol though its
RS485 serial port, allowing it to act as a BACnet device in any BACnet application. The
meter also has a Web interface via its RJ45 Ethernet port that you can use to remotely
set up the BACnet MS/TP and for Modbus TCP/IP configuration. The Ethernet port can
also track energy readings through the internet using any standard Web browser. Sec-
tion 7.1.1 gives an introduction to the BACnet protocol. The Shark® 50B meter uses
BACnet MS/TP (master-slave/token-passing), which is designed to run at speeds of 1
Mbps or less over twisted pair wiring, and in which the device takes turns being a
master and a slave, dependent on whether it is sending or receiving data.
8.2: Shark® 50B Meter’s BACnet Objects
The Shark® 50B meter's BACnet/MSTP implementation has 56 predefined objects of
electrical measurements. No programming or mapping is necessary to use these
BACnet objects. The object’s names easily identify the measurements they contain.
All of the objects, with the exception of Modbus Meter and POLL_DELAY are AI (analog
input) Object type. The following table lists each of the objects with their units of
measurement and description.
Object Name Unit of Measurement Description
Modbus Meter-147222 none (Addr. 1)
POLL_DELAY AV-1 Polling Delay
VOLTAGE_LN-A
volt
Voltage A-N
VOLTAGE_LN-B volt Voltage B-N
VOLTAGE_LN-C volt Voltage C-N
VOLTAGE_LL-AB volt Voltage A-B
VOLTAGE_LL-BC volt Voltage B-C
VOLTAGE_LL-CA volt Voltage C-A
CURRENT_LN-A amp Current A
CURRENT_LN-B amp Current B
CURRENT_LN-C amp Current C
PWR_ELEC watt Total Active Power
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