Intelligent Technologies (
IT.
) D77B-DSNAP
6
Pub. No. MN05004001E
September 2002
Power Source
The
IT. D77B-DSNAP is designed for use with 24V DC power. The D77B-DSNAP uses power
from two sources, the DeviceNet subnet and the Eaton’s Cutler-Hammer
IT. Starter. This
allows the D77B-DSNAP to indicate to the user that the
IT. Starter does not have 24V DC
power, signaling a fault or an E-Stop.
Power for DeviceNet communication CPU comes from DeviceNet, as illustrated in Table 6.
Some power is required from the starter for communication to be present between the
IT.
Starters and the D77B-DSNAP.
The power for the
IT. Starter must be connected to the Starter Terminal Adapter.
Table 6: Power Requirements
When a power supply is chosen for the starter(s), size it for the load of the starter(s) and the
D77B-DSNAP using the appropriate
IT. contactor and starter user manual.
The power for Eaton’s Cutler-Hammer
IT. Starter must be connected to the IT. Starter
terminal, as illustrated in Figure 3.
Figure 3: Starter Terminal Adapter Connection
CAUTION
Only apply 24V DC to the D77B-DSNAP. Use of any other voltage
may result in personal injury, property damage and damage to the
D77B-DSNAP.
Current Source
Load
DeviceNet
90 mA
IT. Starter
Less than 1 mA
To Starter
J1
Optional
E-Stop
(Push to Open)
+
24V DC
–
SNAP
Terminal
Adapter
To DSNAP