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NRG User Manual | © 2020 | CARLO GAVAZZI LTD.
V1.0 | NRG EtherCAT User Manual | © 2022 | CARLO GAVAZZI LTD.
EN
External Firing mode
The RG..N can also be controlled externally via the A1,A2 terminal behind the blanking cover. For further information on
the technical specifications of the input terminal, please refer to the product datasheet. External firing is only available
on the RGx1A..CM..N solid state relays.
Figure 17 Remove blanking cover from bottom of RG..N to control the RG..N externally. RGM25 plug is
required (not included)
Note:
For percentage power control switching modes (Burst, Distributed Full cycle, Advance Full cycle and Phase Angle),
the response time for each RG..N on the bus chain shall increment by a half mains cycle with each device. Therefore,
with 32 devices on the bus chain (max); all RG..Ns are controlled within 250 and 320ms depending on the cycle time.
6.3
Measurements
Voltage RMS
The last reading of the rms voltage is recorded. The value of the reading is in 1V steps hence a value of 50 means
50V, a value of 700 means 700V. If a fault occurs in the system such that it is not possible to measure the voltage, the
reading is 0. The reading is updated every half cycle based on the average of the last 16 half cycles. If the Ref terminal
is not connected this register reads the on-state voltage of the RG..N when the output is ON.
Current RMS
The last reading of the RMS current is recorded. This reading is in steps of 0.01A hence a value of 50 means 0.5A and
a value of 1747 means 17.47A. If a fault occurs in the system such that it is not possible to measure the current, this
value is 0. This reading is updated every half cycle but is based on the average of the last 16 half cycles.
Frequency RMS
The last reading of the frequency is recorded. The value is in steps of 1 Hz. If a fault occurs in the system such that it is
not possible to measure the frequency, this register gives a value of 0. This value Is updated every half cycle but is
based on the averaged value of the last 15 cycles.
Hold Current
The average current of the last 16 ON half cycles. This value is in steps of 0.01A hence a value of 50 means 0.5A and
a value of 1747 means 17.47A. This measurement can be used as feedback current for an I
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control feedback loop.
Apparent Power
The apparent power reading is recorded in VA. This reading is in steps of 1VA and hence a value of 567 would mean
567VA. This value is updated every half cycle and is a multiplication of the Voltage RMS value and Current RMS value
determined in the last half cycle. This reading requires the ‘Ref’ terminal to be connected, otherwise the value will be
constantly 0.
Real Power
The real power reading is recorded in W. This reading is in steps of 1W and hence a value of 567 would mean 567W.
This value is updated every half cycle and is a multiplication of the Voltage RMS value and Current RMS value
determined in the last half cycle. This reading requires the ‘Ref’ terminal to be connected, otherwise the value will be
constantly 0.
Note that for resistive loads with power factor = 1, the real power and the apparent power will be the same.
