Instruction Manual

Chapter 1 Introduction

12 EM720 Power Quality and Revenue Meter

• Menu-driven setups

Digital I/O

• Four embedded digital inputs with 1 ms scan time

• Replaceable 2DI/2DO expansion I/O modules with 1/2

cycle scan/update time

Memory

• 8 or 16 Mbyte flash memory for long-term billing,

event, waveform and data recording

Communications

• Front Infrared IEC 62056-21 serial communication port

(IEC 62056-21, Modbus RTU/ASCII and DNP3

protocols)

• Plug-in serial RS232/RS485 communication port

(Modbus RTU/ASCII and DNP3 protocols)

• Plug-in full speed USB 1.1 port (Modbus RTU protocol)

• Plug-in Ethernet port (Modbus/TCP and DNP3/TCP

protocols, IEC 61850 – future releases), up to 5

simultaneous connections

• Plug-in wireless GSM/GPRS modem (Modbus/TCP and

DNP3/TCP protocols)

Expansion I/O and Communication slots

• 3 expansion slots for plug-in I/O and communication

modules

Backup Power Supplies

• Rechargeable auxiliary battery (more than 3 hours

operation time with a NiMH battery, up to 7 hours

operation with a Li-Ion battery)

• Auxiliary 24VDC backup power supply module

• Auxiliary 85-265VAC/90-290VDC backup power supply

module

Upgradeable Firmware

• New features can be easily added to your meter by

simply replacing firmware through any communication

port.

Software Support

• PAS – free meter configuration and data acquisition

tool

• eXpertPower

– SATEC proprietary Internet services