Communication port
ENGLISH 2/8
MI003074-E
RS485
Baud rate: 1200..115200 baud. Protocol: Modbus RTU
Voltage input
Input
Up to 600 Vac, frequency 50 or 60 Hz
Class/Base Precision
(1)
Network Frequency: 50 or 60 Hz.Voltmeter : 0,5 %.
Amperometer : 0,5 %. Wattmeter : 0,5 %.
(1) Precisions are given in the following range:
(without error due to external Rogowski’s coil)
Type
Digital output for energy counter
Passive (it has to be powered on), no protection for short circuit
Range
50 mA / 28 V
Model S203RC-D is a complete three-phase network analyzer, with display,
that can be
use
only with Rogowski’s coil
: up to 600Vac voltage range, max current equal to 2000 A
connected to the inputs.The instrument provides all the following electrical measurable
quantities:
Vrms, Irms, Watt, VAR, VA, Frequency, Cos
and
Active Energy
. All
measurements given above (except frequency) are available both single-phase and three-
phase.Measurements are read through serial communication both in floating point and
normalized format (except Frequency and Active Energy).It is possible the analog
retransmission of any Vrms, Irms, Watt and Cos
quantity either single phase or three-
phase, or any phase chosen (by specific display or MODBUS registry). The module is also
distinguished by:
Communication configurability through software.
RS485 serial communication with MODBUS-RTU protocol, maximum 32 nodes.
Easy-wiring of power supply and serial bus by means of the bus housed in the DIN rail.
High precision: 0,5 % class.
Protection against ESD discharge up to 4 kV.
Measure input insulation: 4000 Vac towards all the other circuits.
Insulation between communication and power supply: 1500Vac.
Insulation between retransmitted output and power supply: 1500Vac.
Analog output signal settable in voltage or current.
Digital output for energy counter
All kind of insertion possible: single phase, Aron, four wires
Possibility to compensate errors caused by frequency change in places where network
frequency is not stable (frequency changes > 30 mHz).
GENERAL SPECIFICATIONS
TECHNICAL FEATURES
Vrms
: 40..600 Vac;
Cos
>0,9
Irms
: 0,4-100% Iprimary of Rogowski’s coil
USB
Mini-USB, for programming (software Easy)
Output signal for S203RC-D current input:
• 100 mV correspond to 1000 A @ 50 Hz (sinusoidal)
• 120 mV correspond to 1000 A @ 60 Hz (sinusoidal)
Rogowski’s coil
features, supplied by
Seneca and calibrated
(accessory
RC-V400-100)
Max measurable current: 100 kA @ 50/60 Hz
Internal resistance: 30 Ohm / 400 mm
Accuracy
after calibration
: ± 1 % (
see the chapter
«Rogowski’s coil»
)
Linearity: ± 0.2 %
