The AT140 is a 24 V, 40 VA universal mount transformer|Provides a low voltage power source for any Honeywell zone control panel or damper|Powers up to 5 ZD or ARD damper motors and 14 RRD damper motors from one 40VA transformer
Honeywell Transformer, 120/240 VAC Primary, 24 VAC Secondary, 40 VA, 60 Hz, Universal Mount, -20 to 105 deg F, Import