Electrex ATTO D4 RS485 Instrucciones de instalación - Página 4

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Voltage connection
Use cables with max cross-section of 2,5 mm
that follow.
Current connection
It is necessary to use external CTs with a primary rating adequate to the load to be metered and with a 5A or 1A secondary rating. The number of CTs to be used (1, 2 or 3) depends
upon the type of network. Connect the CT output(s) to the terminals marked I1, I2, I3 (current input) of the instrument according to the applicable diagrams that follow. Use cables with
cross-section adequate to the VA rating of the CT and to the distance to be covered. The max cross-section for the terminals is 4 mm
N.B. The CT secondary must always be in short circuit when not connected to the instrument in order to avoid damages and risks for the operator.
Warning: The phase relationship among voltage and current signals, the P1-P2 orientation and the S1-S2 connection of the CT(s) must be carefully respected.
All disregard of this rule or of the wiring diagram leads to severe measurement errors.
4W Star (4 wire) 3PH-4W
P1
P2
L1
S1
S2
P1
P2
L2
S1
S2
P1
P2
L3
S1
S2
N
U1 U2 U3
VOLTAGE INPUT POWER
I1
I2
S1 S2 S1 S2 S1 S2 A B
BI-PHASE 2PH-2W
P1
P2
L1
S1
S2
L2
U1 U2 U3
N
17
18 19
VOLTAGE INPUT POWER
I1
I2
I3
RS-485
S1 S2 S1 S2 S1 S2 A B
10 11 12
DIGITAL INPUTS AND OUTPUTS CONNECTION
(Applicable only to type PFA6411-12)
+
20
DI (-)
19
DI (+)
19
AUX
!
IN/OUT
Digital 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
akse srl Via Aldo Moro, 39 42124 Reggio Emilia Italy
Tel. +39 0522 924 244 Fax +39 0522 924 245 [email protected] www.akse.it
P.I. 01544980350 R.E.A. 194296
VOLTAGE AND CURRENT CONNECTION
if fl exible 4 mm
if rigid and connect them to the terminals marked voltage input on the instrument according to the applicable diagrams
2
2
L1
N
N
17
18 19
20
AUX
I3
RS-485
AUX
10 11 12
20
AUX
AUX
12
-
DO2
11
DO1
20
10
Common
Digital outputs (optocoupled NPN transis-
tor type per DIN 43864)
Maximum applicable voltage:
Maximum switchable current:
Cap. Soc. Euro 85.800,00 i.v.
SINGLE PHASE 1PH-2W
P1
P2
S1
S2
U1 U2 U3
N
17
18 19
20
VOLTAGE INPUT POWER
AUX
I1
I2
I3
RS-485
AUX
S1 S2 S1 S2 S1 S2 A B
10 11 12
INPUT & OUTPUTS CONNECTION EXAMPLE
Out PLC
Common
(+)
(-)
Es. PLC
U1 U2 U3
N
17
18 19
20
VOLTAGE INPUT POWER
AUX
Es.
Input M8 Supervisor
I1
I2
I3
RS-485
AUX
1 2 C
3 4
S1 S2 S1 S2 S1 S2 A B
10 11 12
(-) (+) (+)
POWER SUPPLY AND SERIAL LINE CONNECTION
The instrument is fi tted with a separate power supply. The power supply terminals are
numbered (17) and (18). Use cables with max cross-section of 2,5 mm
if rigid.
AUX
!
IN/OUT
10
11
12
C
1
2
27 Vdc
27 mA
2
.
3W Delta (3 wire) 3PH-3W-2CT
P1
L1
S1
L2
P1
P2
L3
S1
S2
FROM:
- TRANSDUCER WITH CONTACT CLEAN
- GME
- STATE ON-OFF
- STATE ALARMS
U1 U2 U3
N
17
VOLTAGE INPUT POWER
I1
I2
I3
RS-485
C
S1 S2 S1 S2 S1 S2 A B
230 ÷ 240 V ±10%
N
L
FUSE
(50mA T)
U1 U2 U3
N
17
18 19
VOLTAGE INPUT POWER
I1
I2
I3
RS-485
S1 S2 S1 S2 S1 S2 A B
10 11 12
Serial RS485 port
A B
P2
S2
U1 U2 U3
N
17
18 19
20
VOLTAGE INPUT POWER
AUX
I1
I2
I3
RS-485
AUX
S1 S2 S1 S2 S1 S2 A B
10 11 12
NC
NC
18 19
20
C
C
230 Vac
AUX
NO
NO
Power
R
R
e
e
Supply
l
l
a
a
y
y
Max
27 Vdc
27 mA
AUX
10 11 12
(-)
(+)
if fl exible, 4 mm
2
20
AUX
AUX
Engineered and manufactured in Italy
Made
in
Italy
Pensato, progettato e prodotto in Italia
Subject to modifi cation without notice.
Edition 2015 04 24 ENG0001
2