ELTS2 Hardware Changes
Hardware Changes
In early 2021 ETC made a change to the internal hardware of ELTS2. Specifically the contactor, relay and interconnect have been replaced with new hardware, all other parts of the ELTS2 remain unchanged.
These parts cannot be used interchangeably with the old hardware and replacements must be replaced with same generation parts.
Old Hardware
The below image shows the old generation GE Contactor (pre-April 2021) ELTS2 hardware.
New Hardware
The image below shows the new LS Electric hardware found in ELTS2 units manufactured post-April 2021.
Additional Information
How to manually change the state of a new contactor
To deactivate an active contactor, slide the switch towards the 0 marking. The contactor will disconnect the power from the loads.
To activate the other side of the contactor, depress the recessed button using a blunt, non-conductive tool (for example a plastic pen). If the button will not depress, check that the other contactor is deactivated.
What to do with broken contactors
In most cases, the entire assembly pair will need to be replaced. Sometimes, damage to other components isn't immediately apparent. In cases where a contactor is damaged all components of both pairs should be replaced. If it is abundantly clear that damage is isolated to a specific component, then only that specific component may be replaced.
Part Numbers
| Hardware | Part Number |
|---|---|
| Mechanical Latch | RL424 |
| Interlock | RL423 |
| Contactor | RL422 |
NOTE: on The RL424 Latch
In May 2024 LS Electric Changed the ML-65 latch so It no longer works with the the contactor that we use. Since Feb 2025 ETC started using the ML-40 Mechanical Latch. The ETC part number (RL424) stayed the same.
Can new hardware replace old hardware?
No. Even if you are replacing the entire assembly (contactor, mechanical latch, and interconnect) you should only swap hardware with same generation parts. The wiring differences for the new hardware will make this swap too difficult in the field.
If you need to purchase old generation hardware, contact your local ETC Dealer for pricing.
Identifying which hardware is in your ELTS2
Use the pictures above to help identify the hardware in the panel.
Additionally all units with new hardware will have different top-level part numbers from their predecessors. New hardware units will have part numbers structured as 1096A11XX while old hardware units had their part number structured as 1096A10XX.