QUAD EZ-4000, Owners And Installation Manual

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THE BEA BODYGUARD
The BodyGuard is a sensor made by BEA, Inc. It mounts on the header and faces the swing
area (area that the door swings
into when it opens). The sensor's job is to provide most of the
safety on high energy, high speed operators. It does this by:
1. Preventing the door from opening if it's closed and someone is standing in the swing area.
2. Preventing the door from closing if it's open and someone is standing in the swing area.
When the door begins closing, the sensor must be ignored. Otherwise, it would "see" the
swinging door and prevent the door from re-opening [recycling] for another pedestrian until
the door completed its close cycle and the sensor clears again. It is often the function of an
accessory device called a "lockout relay" to block the sensor signal while the door is closing.
However, the Quad System ES-500 control does
not require a separate lockout relay, as it has
the lockout feature built in.
For maximum safety, the BodyGuard memorizes
two patterns - covering the entire swing area
when the door is closed, and covering the swing area minus the area occupied by the door
when the door is open. In order to do this, the BodyGuard needs to know when the door is
open. This is accomplished with what is called a "data lead" signal. This feature is also built
into the ES-500 control as standard.
So, in summary, the BodyGuard prevents the door from opening if it's closed...prevents the
door from closing if it's opened...and is ignored while the door is closing.
Note: If the door is set up per ANSI 156.19 standards for low energy operators, no sensors are
needed on the swing side of the door. The BodyGuard and other similar sensors are only
needed for high energy, high speed operation.
NOTE: An optional harness assembly, Quad Systems part number 600-0007-01, is
required to connect the BodyGuard to the Quad Systems E-S500.