Trip relay, Status leds – Rockwell Automation 193 193-5.0: Bulletin 913/592 SMP-3 Solid-State Overload Relay User Manual
Page 50
Chapter 4 – Functional Description
4-2
ATTENTION: Noise suppression circuitry
across OUT A and OUT B inside the SMP-3
overload relay allows leakage current to flow
when the output is in the off-state. See Appendix
A for leakage current.
Trip Relay
The SMP-3 overload relay contains a Normally Open trip relay
across terminals 30 and 40 (See Appendix A for Trip Relay
ratings and recommended fusing). When power is applied to an
unfaulted SMP-3 overload relay, the trip relay will close.
However, when power is applied to a faulted SMP-3, the trip
relay will remain open until the fault is reset.
Once the trip relay is closed, it will remain closed until the
SMP-3 overload relay is de-energized or until a fault occurs. If
a fault does occurs, the trip relay will open. The trip relay will
remain open until the fault is reset. Once the fault is reset, the
trip relay will again close.
ATTENTION: Noise suppression circuitry
across the Trip Relay can result in leakage current
flowing through the relay circuit while it is in the
open state. See Appendix
Status LEDs
The SMP-3 overload relay contains four LEDs to display the
status of the SMP-3 overload relay. The description of each
LED is as follows:
LED
Color
Description
Power
Green
ON when power is applied to terminals 50 and 60
OFF when power is removed from terminals 50 and 60
AC OUT A Yellow
ON when the triac output at terminal 10 is turned ON
OFF when the triac output at terminal 10 is turned OFF
AC OUT B Yellow
ON when the triac output at terminal 20 is turned ON
OFF when the triac output at terminal 20 is turned OFF
Trip
Red
FLASH a specific fault code when the SMP-3 overload
relay is tripped OFF when the fault is cleared
ATTENTION: The yellow status LEDs for
OUT A and OUT B indicate that the SMP-3
overload relay’s micro-controller attempted to
turn the triac ON or OFF. It is not an indication
that it did, in fact, turn it ON or OFF.
When a fault occurs, the SMP-3’s Trip LED and Remote Reset
LED (Allen-Bradley Cat. No. 800T-NX1311) will flash a
specific fault code. The code consists of flashing a specific
number of times, pausing, then repeating the same number of
flashes. Table
associated with each type of SMP-3 fault.