Yokogawa Removable Chassis DX1000N - Manual (Page 122)

3-28 IM 04L41B01-01E
3.12 Using the Alarm Annunciator Function (Release number 3 or later)
When the relay is set to AND logic
Relay hold
ACK ACK
Alarm A
Occurrence
Alarm B
Occurrence
Release
Release
Relay
Activated
Deactivated
Alarm B has occurred, so now all alarms have occurred.
This causes the relay to be activated.