4
Instructional Leafl et
IL03901003E
Effective May 2011
DS7 series soft start controllers, Frame 1 (4–12A)
EATON CORPORATION
www.eaton.com
Control wiring
A minimum of 18 AWG should be used between the control power
source and the soft start controller terminals.
Terminal connections are to be secured to a torque value of
10.62 lb-in.
Control wiring is connected to the DS7 soft start controller on the
front of the unit. Use the wiring diagrams in
Figure 3
,
Figure 4
, and
the sizing/torque information in
Table 9
as guides.
TOR
+A1
–A2
13
14
24 Vac/Vdc, 110/230 Vac
+U
s
(+) U
s
(–) U
s
Q1
Direct start control wiring without soft stop
Figure 3.
Direct start control wiring with soft stop
Figure 4.
u-Start
U
t
13 –A2
TOR
(Top of Ramp)
t-Start
t-Stop
13 –A2
TOR
Start and stop ramp functions
Figure 5.
Terminal designations
Table 8.
Terminal
Description
–U
s
Control ground or circuit common
+U
s
Power of AC load
–A2
Common with –U
s
+A1
Run command
13
Top of ramp contacts—NO
DS7 terminal control block wiring
Table 9.
Name
Block
Designation
Input
Connections
Circuit
common
–U
s
Common
Control ground or
circuit common
Power
+U
s
24 Vac/Vdc/120–230 Vac
maintained
Plus DC power or
AC load
–A2
–A2
Control power common
Common with –U
s
+A1
+A1
24 Vac/Vdc/120–230 Vac
maintained
Run command
Relay
13
NO contact rated at 250 Vac,
3A resistive, 1A inductive
Top of ramp signal—
in bypass
Control power requirements
The AC control power for your DS7 soft start controller must meet or
exceed the following requirements:
Minimum supply current:
•
20 mA
•
30 mA (with optional fan)
•
100 mA (with optional fan, in bypass)
•
Peak current requirement = 250 mA for 50 ms
•
TOR
+A1
–A2
13
24 Vac/Vdc, 110/230 Vdc
+U
s
(+) U
s
(–) U
s
Q1
S3
