The T7010 70 volt 10 watt line transformer has wattage taps. It has 10, 5, 2.5, 1.25, and 0.625 watt taps. It also offers color coded leads.
Multiple Wattage Taps: 10W, 5W, 2.5W, 1.25W, 0.625W
Open-Frame Transformer. Output voltage: 24 or 28 VAC/100W. Input voltage: 120VAC or 240VAC.
Use in a wide variety of applications, including CCTV, access control, and alarms
Dual input voltage: 120/240VAC, 50/60Hz
Works with the SECO-LARM series of power supply / chargers...
The MGT-28100 from MG Electronics is a class I open frame transformer.
Secondary: 28VAC 100VA
Open Frame Class I Transformer
Comes with AC line cord