ROFU 9116 Plug-In Class 2 UL Listed Transformer, 120VAC 60Hz Input, 16VAC at 0.8A Output

The 9116 takes 120 VAC at 60 Hz in and puts out 16 VAC at 0.8 amps. That is the model to order when your device calls for 16 volts AC. Its siblings cover the other common coil voltages: the 9112 gives 12 VAC at 1.5 A and the 9124 gives 24 VAC at 0.42 A. Match the transformer to the voltage stamped on the strike, maglock or controller you are powering, not the other way around.

0.8 amps at 16 VAC, which works out to about 12.8 VA. Add up the inrush and holding current of everything you are hanging on it before you commit. Continuous-duty strikes are usually the ones that eat the budget, and if you go over you either split the devices across a second transformer or move to a larger supply.

It is a UL Class 2 device. Class 2 is what lets the low voltage side be run as limited-energy wiring rather than in conduit like line voltage, which is why access control installers reach for these. The primary side is a plug, so it drops into a standard 120 VAC receptacle rather than being hardwired.

You need a receptacle. The 9116 is a plug-in unit, not a board-mount or hardwired transformer, so it lives at a 120 VAC outlet and the 16 VAC pair runs from there out to the door. Common practice is an outlet inside or above the ceiling near the controller. If your job requires everything inside an enclosure, a plug-in is the wrong form factor and you want a boxed power supply instead.

They differ only in secondary output. The 9112 is 12 VAC at 1.5 A, the 9116 is 16 VAC at 0.8 A, and the 9124 is 24 VAC at 0.42 A. All three run on 120 VAC 60 Hz and are UL Class 2. Note the current falls as the voltage rises, so the 9112 is the one with the most amperage available if you are running several 12 volt devices.

Yes, it is a commercial-rated part in ROFU's access control line, sold to power strikes, maglocks and controllers on commercial openings. The 120 VAC 60 Hz input matches standard North American building power.