Ditec Entrematic EMSL 12V Replacement Battery DAS901BAT1

Ditec Entrematic EMSL / DAS107 Series — 12V Ni-MH Replacement Battery (DAS901BAT1)

This is a 12V 1500mAh Ni-MH battery for the backup power circuit in Ditec Entrematic automatic door operators. It fits the EMSL, DAB105, DAS107, and DAS107 Plus units. When mains power fails, this battery keeps the door operator functional so the entrance can complete open and close cycles safely.

• EMSL, DAB105, DAS107, and DAS107 Plus compatibility: These operators share the same 12V backup battery bay, connector pinout, and charge management circuit — the controller charges and monitors the backup battery through the same board regardless of model variant.
• Bench tested on actual hardware: We ran the battery through the door controller's charge cycle and confirmed the BMS accepted the charge without fault flags. We then simulated a mains failure and verified the backup circuit activated and the motor driver received stable voltage through a full door stroke.
• Power-fail verification after installation: After fitting the battery, allow 24 hours of charge on live mains before testing. Then manually trigger a power-fail simulation during a low-traffic period to confirm the door completes a full open-and-close cycle under load — this is the only way to confirm the backup system is genuinely functional.

Door controller losing programming after a mains outage

The EMSL and DAS107 controllers store their operating parameters — travel limits, speed profiles, and sensor calibration — in volatile RAM. That RAM is held alive by the backup battery even when mains is cut. If the backup battery is depleted or has dropped below approximately 10.5V under load, the RAM loses power and the controller reverts to factory defaults or an error state. After fitting a new battery and allowing a full charge, re-enter the door's travel limit and speed settings before returning the entrance to service.

Backup circuit not activating when mains power drops

If the door stays closed and unresponsive during a power outage, the most common cause is a backup battery that has self-discharged below the controller's minimum threshold — typically around 10.8V. Ni-MH cells self-discharge faster than Li-ion, so a battery sitting unused for several months can drop too low for the backup circuit to engage. Replace the battery, charge for 24 hours on live mains, then confirm activation by cutting power at the isolator and checking that the door responds to a manual open command.