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This automatic transfer switch controller is a direct replacement, utilizing a connector layout and mounting footprint identical to the original.
These controllers were found in ZTG, ZTS, and ZBTS Series switches, as well as the CAT branded versions of those switches.
Replaces Part Numbers:
- MX250: 50P-1159, 50P-1161
- MX200: 50P-1022, 50P-1052, 50P-1100
- MX150: 50P-1158, 50P-1160
Our replacement includes these improved features:
- Setup Assist to expedite initial configuration. OPN not required for setup.
- Easy to read four-line display and intuitive menu system. During operation, more information is available at a glance.
- Completely configurable from front panel. No additional software required.
- Compatible with standard, closed, and programmed transition styles.
- 16 configurable exercise cycles allow you to accommodate any generator exercise requirements.
- Improved backup supply keeps controller powered while generator starts.
- 11 programmable inputs and 12 programmable outputs allow you to repurpose unused functions.
- Supports the Modbus standard, allowing remote communication.
- Event log not currently implemented - coming soon.
- Optional accessories also available:

Engine Start Relay for DIN rail.

Replacement Foam Gasket for Faceplate.