Specifications
CA08102001E For more information visit: www.eaton.com
50-19
PLC, I/O & Communications Products
February 2009
50
IT. Connect
Starter Network Adapters (SNAP) (D77B Series) — DeviceNet SNAP
DeviceNet Starter Network 
Adapter Product (DSNAP)
Catalog Number D77B-DSNAP-X3
with 54 mm IT. Starter
Product Description
The Cutler-Hammer
® 
DeviceNet Starter 
Network Adapter Product (DSNAP) 
from Eaton’s electrical business is a 
front-mount device that serves as a 
single node on DeviceNet, providing 
communication capability, control and 
monitoring to Intelligent Technologies 
(IT.) Electromechanical Starters, as 
well as the S751 and S752 Soft Start, 
as listed in Tables 50-17 – 50-19.
The IT. DSNAP has an optional HANDS/
OFF/AUTO (HOA) module that enables 
the starter to be operated in hand 
mode; even if the DSNAP is not pow-
ered. The HOA option is used for cus-
tomers who need the extra security of 
manual control in conjunction with the 
communication capabilities of 
DeviceNet.
With the addition of a D64 zero 
sequence CT, the DSNAP can be 
enabled to detect ground faults for 
added protection.
Features
■ Communication to DeviceNet 
consuming one DeviceNet MAC ID.
■ Manually set MAC ID and baud rate; 
configuration using a software 
application is not required for 
normal operation.
■ Advanced configuration using 
CH Studio.
■ Includes pre-wired starter inter-
connect cable and terminal adapter.
Comprehensive Motor Data 
and Control
■ RMS average current.
■ % of operating FLA.
■ % thermal memory.
■ Integral contact position detection.
■ Operating status and fault codes.
■ At speed (soft starters).
■ START/STOP control.
■ RUN/FORWARD-REVERSE control.
■ Trip reset.
Extended Starter Capabilities
■ Ground fault detection 
(with accessory).
■ Fault log.
■ Overcurrent warning (adjustable).
■ Undercurrent warning (adjustable).
Figure 50-18. Typical DSNAP Application
IT. Starter 
with 
DSNAP
DeviceNet
Table 50-17. IEC SNAP Connectivity 
Table 50-18. NEMA SNAP Connectivity 
Table 50-19. S751/S752 SNAP Connectivity 
Application Description
In a typical application, the DSNAP 
front mounts to an IT. starter or soft 
start. The DSNAP connects directly to 
DeviceNet, allowing for control and 
monitoring of the starter/soft start. A 
PC or PLC serves as the central control 
and scans the DSNAP for motor con-
trol and monitoring information. The 
HOA module provides for the ability 
to locate operators on the panel for 
manual operation.
IEC E101, E501
Frame Size Continuous
Ampacity
Rating
45 mm B 18 Amp
25 Amp
32 Amp
54 mm C 40 Amp
50 Amp
76 mm D 65 Amp
85 Amp
100 Amp
105 mm E 125 Amp
160 Amp
200 Amp
140 mm F 250 Amp
315 Amp
420 Amp
NEMA N101, N501
Size Continuous Ampacity
Rating
00 9
0 18
1 27
2 45
3 90
4 135
5 270
S751/S752 Soft Start
54 mm All Sizes










