Electrex Atto RCM D4 ECT Installation Manual - Page 2

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SETUP SEQUENCE
PARAMETERS
VALUES AVAILABLE
RS-485
ADDR (485 address)
1 ... 247
COM (Baud rate)
2400, 4800, 9600, 19200, 38400
COM (Data Bit)
7 or 8
N = no parity, E = even parity,
COM (Parity)
O = odd parity
COM (Stop bit)
1 or 2
S.T. (Silent Time)
0 ... 1000 mS (Step of 10)
NETWORK
IMAX
5 ... 16 A / 5 ... 16 mA
CUTOFF (Current)
0 ... 16
DIFFERENTIAL
RCD ENABLING
CH 1, 2, 3
INTERVENTION
0 ... X mA
THRESHOLD
PRE-ALARM THRESHOLD
0 ... X mA
INTERVENTION TIME
0 ... 5000 mS
PRE-ALARM TIME
0 ... 5000 mS
PRE-ALARM HYSTERESIS
0 ... 100 %
TABLE n.1 - Eg. Modbus registers reading parameters, for the complete list refer to
the instrument's protocol)
INPUT REGISTERS
REGISTER DESCRIPTION
30219
Frequency of U1N (f)
30221
Phase to Neutral Voltage, RMS Amplitude (U1N)
30223
Phase to Neutral Voltage, RMS Amplitude (U2N)
30225
Phase to Neutral Voltage, RMS Amplitude (U3N)
30233
Phase Current, RMS Amplitude (I1)
30235
Phase Current, RMS Amplitude (I2)
30237
Phase Current, RMS Amplitude (I3)
TABLE n.2 (Eg. Modbus registers writing parameters, for the complete list refer to
the instrument's protocol).
HOLDING REGISTERS
REGISTER DESCRIPTION
41001
RCD status:
Bit 0 = CH 1 intervention
Bit 1 = CH 2 intervention
Bit 2 = CH 3 intervention
Bit 4 = CH 1 pre-alarm
Bit 5 = CH 2 pre-alarm
Bit 6 = CH 3 pre-alarm
41002
RCD enabling:
Bit 0 = Channel 1 (default)
Bit 1 = Channel 2
Bit 2 = Channel 3
41003
RCD tripping threshold (mA)
41004
RCD tripping time (ms)
41005
RCD pre-alarm threshold (mA)
41006
RCD pre-alarm time (ms)
41007
Pre-alarm hysteresis
DEFAULT
SETUP SEQUENCE
PARAMETERS
27
38400
8
DIGITAL OUT 1
N
POLARITY (note A)
2
DIGITAL OUT 2 (see DIGITAL OUT 1)
100
5/.005
NOTE: A
0
N.O.
N.C.
CH 1
OUTPUTS
30 mA
10
11
30 mA
12
0
13
0
OUTPUTS
5 %
Maximum applicable voltage:
Maximum switchable current:
N.B. Digital outputs (Optocoupled NPN transistor
type for DIN 43864).
TYPE
UNIT
Float IEEE754 [Hz]
Float IEEE754 [V]
Float IEEE754 [V]
Float IEEE754 [V]
Float IEEE754 [A]
Float IEEE754 [A]
Float IEEE754 [A]
TYPE
Integer
Integer
Integer
Integer
Integer
Integer
Integer
INPUTS - OUTPUTS
VALUES AVAILABLE
N.O.,N.C.
Normally open
Normally closed
C1 Common 1 (negative)
O1 Diff erential intervention
C2 Common 2 (negative)
O2 Pre-alarm intervention
27 Vdc
27mA
NC
1920
2122
AUX
NO
AUX
101112
13
INPUTS
19
C2 Common 2 (negative)
20
I2 Function test
21
C1 Common 1 (negative)
22
I1 Diff erential intervention reset
INPUTS
Supply voltage (external):
from 10 to 30
Vdc
Current consumption:
from 2 to
10mA
Max. count frequency
10 or 100Hz
N.B. For gas meters a galvanic separation is
needed per ATEX standards
NC
C
C
NO
N L
230 V~
R
R
e
e
l
l
24V =
a
a
- +
y
y
DEFAULT
N.O.