Wiring – Output Relay And Digital Inputs - ORION ITALIA IPR-D Instruction Manual

WIRING – OUTPUT RELAY AND DIGITAL INPUTS
2.4
Before carrying out the installation of the unit, it is necessary to read and understand the
indications provided by the Constructor.
All the installation operations must be carried out by qualified personnel with adequate
knowledge of the functioning of the unit and of the content of this manual.
Terminal blocks in the rear side of the unit make the electrical connections.
The 4 output relays on the IPR-D are the following:
Relay Type
TRIP N.O.
AUX1 N.O.
AUX2 N.O.
AUX 3 - SERVICE N.C.
•
In Fig. 2.3 the relays contacts are represented in condition of no power supply.
•
Generally, the circuit breaker AUX 52a contact is connected in series to IPR-D TRIP contact for cutting the
current to the coil. For high-absorption trip coils an auxiliary relay is needed.
•
The service contact is failsafe: it reacts in case of control power drop or of internal fault of the unit. The contact
is N.C.. Connect the SERVICE relay to an external alarm system. For configuring AUX3 relay as a service
relay: "Setpoint Page 2 - OUT OF SERVICE ON AUX3".
The digital inputs must be connected only to dry-contact circuits so as to avoid damaging the IPR-D.
No external voltage should be applied to the corresponding terminals as they are internally energized
from the IPR-D and opto-coupled to the sensing circuitry.
Digital outputs should be isolated from each other for correct operation. The maximum input impedance
to these digital outputs is 2 kΩ.
The power supply must be connected to terminals 32 and 34.
For further information:
CURRENT PROTECTION RELAY - IPR-D
Note
Programmable: "pulsed" or "latched"
Programmable: "pulsed" or "latched"
Programmable: "pulsed" or "latched"
Programmable: "pulsed" or "latched"
[if set as SERVICE: used for signalling any control power drop or internal
fault]
§ 1.7 – "Specification"
DIGITAL INPUT
DIGITAL INPUT 1
DIGITAL INPUT 2
DIGITAL INPUT 3
BREAKER STATUS
Figure 2.2 – Rear view
2.2
Chapter 2: Installing
TERMINALS No.
17 – 18
19 – 20
21 – 22
23 –24
Terminals
1 - 2
3 - 4
5 - 6
7 - 8
Manual P/N: IPR-D GBM 01/09/2006