Pub 49004
Effective 9/00
Page 6
Catalog Steady State Inrush Input
Number Wattage Wattage Voltage
PSS55A 55W 250W 115VAC
PSS55B 55W 250W 230VAC
PSS55C 55W 250W 360 - 480VAC
Protective Features, Cont’d
timer. If 24VDC power is removed, the soft starter remem-
bers the remaining cool-down time and will not reset until
the total cool-down time has elapsed.
The unit monitors these conditions for overload:
Thermal (current) Overload - monitors RMS, with a
5, 10, 20, or 30-second dela time based on Trip
Class setting.
Protective Setting Factory
Feature Default
Overload 32% - 100% of rated current 32%
(FLA Dial Range)
Trip Class 5, 10, 20, 30 5
Fault Reset Auto, Manual Manual
Jam On, Disable On
Stall On, Disable On
Phase Loss On, Disable On
Phase Reversal On, Disable On
Overload On, Disable On
Programming Settings
General
To program and operate the IT Soft Starter, a Control
Interface Module (CIM) is required (see Fig. 6). The CIM
(Catalog No. EMA71) is for use with all models: S801N,
S801R, S801T, and S801V. The CIM (Catalog No. EMA72)
is used with all model S801N, S801R, S801T and S801V
with the pump control option (see Fig. 7). The CIM serves
as the interface between the operator and the Soft Starter
control circuitr to program the Soft Starter. The CIM dip
switches and rotar controls are used to select the Soft
Starter settings. When making adjustment to the CIM
under normal operation, the LEDs will function as follows:
A change to an dip switch will cause all LEDs to flash
momentaril .
An adjustment to an POT will cause all LEDs to light
and sta lit until adjustment of POT has been completed.
While selecting these parameters, 24VDC power ma be
applied to the Soft Starter, but it is not required.
NOTE: The IT Soft Starter does not have to be powered
to make adjustment to the control interface module. Once
the unit is energized, it will communicate with the CIM
and load the program into the Soft Starter. Allow the unit
2 seconds to ensure communication checks complete
and values are set. To verif CIM is operational, press
Fault Reset. If the CIM is powered and communicating,
all LEDs will momentaril flash.
See the user manual for additional detail on the standard
and pump control option.
Procedure for Starting
Application Note - Permissive (P)
(P) must be held high (24VDC) in order to START the
Soft Starter.
Remove 24VDC from terminal P to initiate a stop.
Run inputs (terminals 1 through 4) are a momentar
high (24VDC).
If the inputs (Input 1, 2, 3, 4) are high when the Per-
missive opens, the Soft Starter will STOP.
The Soft Starter will not start when 24VDC is applied
to the Permissive (P) until Input 1 changes from 0 volts
(open) to a high (+24V) condition. (Once P is at 24
volts, Input 1 must c cle from 0 volts to 24 volts to
start.)
On the larger soft starters when the b pass contactors
close, a sound similar to contactor chattering can be
heard. This sound is caused b more than one contactor
closing in a staggered manner over a ver short period
of time. This is part of normal operation and should not
be misinterpreted as a dirt pickup.
For two-wire control, jumper permissive (P) and Input
1, together.
24VDC Power Requirements
When sizing a 24VDC power suppl for our IT soft starter,
it must meet the following stead state and inrush charac-
teristics.
Stead State Minimum = 25 watts
Inrush Minimum = 240 watts for 150 msecs
Voltage on the unit cannot exceed 30VDC. The soft starter
will turn off at approximatel 20.9VDC.
It is recommended that power supplies from Cutler-Hammer
be used.
The following C-H power supplies are available:
Table 5
Table 6
NOTE: A minimum of #14 AWG should be used between
the power suppl and the 24V (+) and (-) terminals of the
soft starter.
Protective Features
The soft starter cannot be restarted until the calculated
cool-down time has passed. C cling power does not reset