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Application Note 015 Version 002 29 Dec 2011

Using An EtherMeter That Is Flashed With The Special Analog Output Firmware

This document describes the wiring procedures and EtherMeter settingsthat are required when using the Special Analog Output Firmware. In most cases, the user will collect flow rate data via the digital Ethernet and Serial communication channels of the EtherMeter. Digitalcommunication protocols include MODBUS®/TCP/RTU/ASCII, DF1, and EtherNet/IP™. However, in some instances, the user may wish to interface to 4-20mA analog signals that are proportional to flow. Tosupport this concept, SCADAmetrics has made available special firmware that enables the EtherMeter to translate its flow-rate signals to an ADAM-4024 multi-channel analog output module (manufactured byAdvantech). The photo in Figure 1 on the following page illustrates SCADAmetrics’ laboratory demonstrator panel for analog flow signaling:

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Figure 1. SCADAmetrics Analog FlowSignaling Demonstrator Panel

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Note that either one or two meter registers may be connected to the EtherMeter. In the demonstration panel illustrated in Figure 1, two meters are connected tothe EtherMeter. Meter wire color codes are according to the Meter Compatibility Matrix. A detailed view of the ADAM-4024 module wiring is illustrated in Figure 2. Like the EtherMeter, the ADAM4024accepts a wide range of DC power supply voltages. In the demonstration panel, the EtherMeter and ADAM4024 share a common +24VDC power supply. Note that the Flow#1 4-20mA signal is obtained from IOUT0+and IOUT0-, and the Flow#2 4-20mA signal is obtained from IOUT1+ and IOUT1-.

Figure 2. ADAM-4024 Hookup Detail.

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ADAM-4024 Configuration:
The Mode Switch on the side of theADAM-4024 module should be in the “NORMAL MODE” position (NOT “INIT MODE”). Otherwise, the ADAM-4024 should be in the factory-default condition (Active Protocol=ADAM, Device ID=1, Baud=9600). No further...