Siemens SICAM A8000 Series User Manual

Standard I/O Modules
SICAM A8000 Series, SICAM I/O Modules Unrestricted 59
DC8-012-2.06, Edition 09.2019
2.8.6 External Circuitry
The following circuitry variants are examples and not related exclusively to the shown values.
Danger
Works on the circuitry may be performed in de
-energized state only!
During electrical installation, all the rules and regulations of power systems must be considered.
2.8.6.1 Short-Circuit Indicator
The current inputs I1, I2/IN, I3 are connected via the adaptor module CM-8820 with the
measuring transformers of the corresponding phase currents.
In this configuration, the module functions as short-circuit indicator. Fault information on the
direction is not provided.
Note
With this connection scheme
, the accuracy of ground current measurements for isolated/resonant ground
connections can
not be assured.
1 2
3
4 5
6
7
8 9
10
X1
AI-8510
2
25 mV
225 mV 225 mV
P2P1
P2
P1
P2
P1
S2S1
S2S1
S2
S1
1 A
1 A
1 A
1
2
3
4 5
6
X1
1
2
3
4 5
6
7
8 9
10
I1_P I1_N I2_P I2_N I3_P I3_N
DNC
I3- DNC
DNC
I1+ I1- I3+
CM-8820
X2
FE Shield
I2-/IN- I2-/IN+
1 2
3
4 5
6
7
8 9
10
X1
CM-8820
225 mV
225 mV 225 mV
AI-8510
X2
1 2
3
4 5
6
7
8 9
X1
1 2
3
4 5
6
7
8 9
10
DNC
N N N DNC
DNC
I3- DNC
DNC
I1+ I1- I3+ I2-/IN- I2-/IN+ U3 U2 U1
FE Shield
CC Shield

Siemens SICAM A8000 Series Specifications

General

Modular Design	Yes
Operating Temperature Range	-40°C to +70°C
Communication Interface	Ethernet, RS485, RS232
Protection Class	IP20
Communication Protocols	IEC 61850, DNP3, Modbus, IEC 60870-5-104
Power Supply	24 V DC, 230 V AC
Mounting	DIN rail
Digital Inputs	Up to 32
Digital Outputs	Up to 16
Input Voltage Range	24 V DC to 230 V AC