The Bell Schedule assigned a Bell Controller Relay sets when your school bells ring. A relay triggers the bells to ring through its hardwired connection to your facility's existing PA or school bell system.
In some cases, you may have a PA or bell system that serves two locations in the school, such as one for middle school classes and another side dedicated to grammar school classes. In this situation, each relay is wired to each of the locations independently of each other and each relay is assigned to its unique bell schedule specific to its location.
Go to Devices > Bell Controller Relays.
Select the 9-character link of the relay. Its profile is displayed.
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From the Assigned Bell/Timer Schedule setting, select the Bell Schedule to be assigned to the relay.
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Select Save.
The Update Pending status is set to Yes when a setting change is scheduled to be downloaded to the device during its next check-in to OneVue. Setting changes take effect when downloaded to the device. Once downloaded, its Updating Pending status is set to No.
A Bell Controller checks-in to OneVue hourly to download pending schedule updates. If you do not want to wait for the hourly check-in, press and release its check-in button 
(up arrow). This initiates a manual check-in and the Bell Controller will connect to the network and download the schedule updates from OneVue.
In addition, the following applies to a bell controller.
A bell controller stores a 7-day schedule in its local memory for each of the two relays. Each night after midnight, the 7-day schedules are downloaded to the device.
A bell controller connects to the facility’s network hourly to download pending schedule updates, transmit its operating condition and events to OneVue, and synchronize its time with an NTP time source.
To ensure the bell rings at the right time, a bell controller has an internal real-time clock that synchronizes hourly with its NTP time source.