Intelligent Technologies (IT.) QSNAP
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
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
Current Source
QCPort
IT. Starter
Load
TBD
TBD
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
To Starter
+
24V DC
–
Optional
To QSNAP
Figure 3: Starter Interface Connection
6 | Pub. No. MN05001001E |