E-Stop Safety Relay
– Model ES-TA-3D1
Fault Type
Cause
Recommended Action
E-stop input fault
1 input shorted, 1 input open
Check E-stop inputs
Replace Power Supply PC board
Replace Communication PC board
Replace Interconnection PC board
Reset input fault
Shorted input on power up
Check Reset input
Replace Power Supply PC board
Replace Communication PC board
Monitor input
fault
Open input on power-up
or after stop
Check for open Monitor inputs
Replace Power Supply PC board
Replace Communication PC board
Output relay fault
Internal circuit failure
Replace Relay PC board
Replace Communication PC board
Power fault
No power or power supply
failure
Check power, LED working?
Replace Relay PC board
Replace Communication PC board
Auto Reset fault
Missing selector card or
Internal circuit failure
Check missing Auto Reset selector card
Replace Power Supply PC board
Replace Communication PC board
The ES-TA-3D1 E-Stop Safety Relay also features a self-contained provision for
troubleshooting; indicator LEDs on the front of the module provide clues to possible
faults. If the circuit is working properly, the Power LED should be ON, and the individual
indicator lights for each Emergency Stop switch input should remain ON.
If one of the Emergency Stop switches connected to the circuit has been activated, its
indicator on the front panel of the module will go OFF; in addition, each indicator to
the right of it, on the panel, will also go OFF. (For example, if switch #4 has been
activated, the indicators for switches 4, 5, and 6 will be OFF).
To reset, start by verifying that the problem prompting the E-stop procedure has been
corrected. The E-stop switch indicator, and all those to the right of it on the control
module front panel, should go ON. Then activate the Reset switch connected to the
ES-TA-3D1 E-Stop Safety Relay, and reset the E-stop switch indicated by the first LED
to be OFF, reading from left to right on the control panel. (For example, if switch #4
has been activated, the indicators for switches 4, 5, and 6 will be OFF; start by
resetting switch #4.) Verify that all monitor indicators are ON. (If one of the monitor
inputs is open, its indicator will go OFF; in addition, each monitor indicator to the
right of it will also go OFF. For example, if monitor 2 is open, the indicators for
monitor 2, 3 and 4 will be OFF.)
If any of the E-stop switch indicators remain OFF, repeat this step with the next E-stop
switch indicator (again, the first/left-most unlit LED on the front of the module
control panel).
NOTE: After a successful reset, both of the K1/K2 indicators should be ON. If not, the
control module has an internal fault and should be returned to the factory for repair.
SECTION 6 — Troubleshooting
Use indicator LEDs on E-stop relay to diagnose fault type (see Section 5.3). Use your
DeviceNet Manager as a troubleshooting aid. Also, see the most current Electronic
Data Sheet (EDS) file; it assigns a number to a specific text string that will be helpful
in troubleshooting problems.
6.1 General E-stop Relay Faults
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