Where Can I Get a K0991 AC Transformer?

You can get a K0991 AC Transformer from the Alarm Grid website. This adapter is used to provide consistent power to a Honeywell 5828 Keypad or a Honeywell 5828V Keypad. The Honeywell K0991 AC Adapter is optional, as both of these keypads can remain powered on using three AA batteries.

The Honeywell K0991 AC Power Adapter is technically not considered a power transformer. This is because it comes with a permanently fixed wire. A transformer needs to have a separate wire secured to its terminals. However, both accessories perform the same function of providing power to an external device. That is why many users might mistakenly refer to the K0991 Adapter as a transformer.

Both the Honeywell 5828 and the Honeywell 5828V can operate reliably using three (3) AA batteries. The keypads preserve battery life by remaining in a "sleep" mode when not in use. Each keypad will enter its sleep mode after 15 seconds of inactivity. When the keypad is in its sleep mode, the user will need to press and hold the [*] key to wake it back up. Even with this power saving technique, the batteries will need to be replaced every few years.

Using a K0991 AC Adapter provides a couple of key advantages. First, the user will not need to press and hold the [*] key to activate the keypad whenever they want to use it. Second, the batteries will last longer, since the keypad will be primarily running on AC power. The batteries can still be used with the keypad, and they will provide a valuable backup power source if the electricity goes out. Keep in mind that you will need to press and hold the [*] key to wake the keypad up when it is running on battery power.

As a regulated AC adapter, the K0991 operates at 5VDC and provides a maximum output of 220mA. The K0991 can be purchased as a standalone item, or it can also be bought alongside a Honeywell 5828DM Desk Mount Kit that includes a desk mount for a 5828 or 5828V.