Eaton Electrical QSNAP - Manual (Page 10)

Intelligent Technologies ( IT. ) QSNAP
6 Pub. No. MN05001001E
February 2002
Power Source
The IT. QSNAP is designed for use with 24V DC power. The QSNAP uses power from two
sources when operating properly; these sources are the QCPort subnet and the Eaton’s
Cutler-Hammer Intelligent Technologies (
IT. ) Electromechanical Starter. This allows the
QSNAP to detect and communicate to the user that the IT. starter does not have 24V DC
power, signaling a fault or an E-Stop.
The main power that powers the communication is from QCPort, as illustrated in Table 5 .
Some power is required from the starter for communication to be present between the
Intelligent Technologies (
IT. ) Electromechanical Starter and the QSNAP.
The power for the IT. starter must be connected to the starter terminal.
Table 5: Power Requirements
When a power supply is chosen for QCPort, take into account the load on QCPort. When a
power supply is chosen for the starter(s), size it for the load of the starter(s) using the
IT.
Contactor and Starter User Manual (Publication No. 49400). Refer to the IT. QCPort System
Install and Planning Guide (Publication No. MN05001002E) for more information on how to
size the power supply for the QCPort system.
The power for the Eaton’s Cutler-Hammer Intelligent Technologies (IT.) Electromechanical
Starter must be connected to the Intelligent Technologies (IT.) Electromechanical Starter
terminal, as illustrated in Figure 3.
Figure 3: Starter Interface Connection
Current Source Load
QCPort TBD
IT. Starter TBD
To Starter
To QSNAP
Optional
E-Stop
+ 24V DC –