difference between DT AND NL

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996L trim is a standard Classroom Function lever set for the 98/99 panic devices.  The 996L-NL trim is a rigid lever for the 98/99 device where the key will retract the latch on the panic device bu...
Night Latch (NL)= key retracts the latch momentarily to allow entry. When key is removed, the latch will extend and locks the door (momentary unlock). Class Room (Lock/ Unlock)= key unlocks...
The E7500 electric mortise lock body supplied on E98/9975 devices require active trims (L, L-BE, TP, TP-BE, K, or K-BE) to retract the latch after the electronic lock body unlocks.
Von duprin will supply the 996L and 996L-BE trims with RX switch. Von Duprin will not supply the 996L-NL and 996L-DT trims with RX switch because the switch monitors the lever movement and the leve...