SATEC EM720 Installation Manual User Manual
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Chapter 1 Introduction
AC/DC Inputs
• Three AC voltage inputs - up to 480VAC direct line-to-line input voltage, for feeding and
measurement
• Three isolated AC voltage inputs - up to 2KV peak direct line-to-ground and neutral-to-ground input
voltage
• Four standard isolated AC current inputs - 5A nominal input currents and up to 50 A fault overload
current
• Optional isolated low DC power supply input – up to 4KV AC insulation withstanding
Input/Outputs Options
The
EM720
is equipped with four fast digital inputs (DI), in the basic instrument, two digital inputs (DI)
and two digital outputs in optional plug-in module (2DI/2DO module)
• DI (basic) – 4 Digital inputs – optically isolated input; dry contact, programmable de-bounce time
from 1 ms to 1 sec; free linkage to Sequence-of-Events Recorder, Fault Recorder, control setpoints,
pulse counters and Energy/TOU subsystem)
• DI (module) – 2 Digital inputs – optically isolated input; dry contact, programmable sampling rate
from ½ cycle to 1 sec; control setpoints, pulse counters and Energy/TOU subsystem)
• DO – 2 Relay outputs – mechanic or solid-state relay, unlatched, latched and pulse operations,
failsafe operation for alarm notifications; programmable pulse width; direct remote relay control
through communications
Communications Options
The
EM720
has extensive communications capabilities:
• Infrared port (Modbus RTU/ASCII and DNP3.0 protocols)
• Versatile RS-232/485 universal serial communications port (up to 115,200 bps, Modbus RTU/ASCII
and DNP3.0 protocols)
• Ethernet 10/100 Base-T port (Modbus/TCP or DNP3.0/TCP protocols, up to five non-intrusive
simultaneous connections, Telnet service port)
• USB 1.1 full speed device port (Modbus RTU protocol, 12 Mbps) for fast local communications and
data retrieving
• Cellular GPRS modem (Modbus/TCP or DNP3.0/TCP protocols)
• 1-ms satellite-synchronized clock - IRIG-B format time-code input
Upgradeable Firmware
The
EM720
uses flash memory for storing device firmware that allows future upgrading of the device
without replacing any hardware component. The new features can be easily added to your device by
simply replacing the firmware through a local RS-232/RS-485, USB port or Ethernet port.