Controlled Products Systems Group SWINGSMART DC 20 - Manual (Page 19)

Secondary Entrapment Protection Sensors
Revision E Safety Requirements S-7
Choosing Secondary Entrapment Protection
The site designer or installer must determine which secondary entrapment sensor devices will be installed with
the SwingSmart operator to meet UL compliance. The type of entrapment sensor device systems are described
below. For a complete listing of the requirements, see UL 325 Safety Standards.
NOTE
SwingSmart is equipped with a primary, Type A, inherent entrapment sensor (IES) that com-
plies with UL 325. Any impediment to gate travel causes the gate to stop and reverse.
To comply with UL 325, refer to the chart and take the following steps:
1. Select the Usage Class according to the gate’s locale and purpose.
2. The required UL 325 primary Type A sensor is an integral part of the SwingSmart system.
3. Based on the gate’s usage class, choose Secondary Type Devices: B1, B2, C, D, or E.
• To comply using B1 - install non-contact sensors (photoelectric sensor or the equivalent).
• To comply using B2 - install contact sensors (edge sensor device or the equivalent).
• To comply using a Type D device requires a CONSTANT HOLD push-button station. This CONSTANT
HOLD push-button station must be the only device that opens and closes the gate. It can only be used where
the gate and push button station will be monitored by personnel 24 hours a day in full view of the gate area.
An automatic closing device (such as a timer, loop sensor, or similar device) must not be employed. A Warning
placard stating, “WARNING - Moving Gate has the Potential of Inflicting Injury or Death - Do Not
S.T.A.R.T. the Gate Unless the Path is Clear” must be placed adjacent to the gate operator controls.
CAUTION
While compliance is possible with Type C, which is a low force limiting clutch, the SwingSmart
operator develops more gate actuation force than is permitted under the UL 325 Safety Stan-
dards and, therefore, its clutch cannot be considered an entrapment protection device.
Similar compliance issues exist with a Type E device (audio warn before operate alarm). A Type
E device is permitted as a means of secondary entrapment protection by UL 325 in Class IV
applications, but it is not recommended by HySecurity because a buzzer warns, but cannot
protect against possible entrapment. HySecurity highly recommends, even for Class IV use, that
secondary entrapment protection (edge or photo-eye sensor) devices be installed to detect
possible entrapment.
Usage Class Primary Type Device Secondary Type Device
Class I, II, III A B1, B2, C, or D
Class IV A B1, B2, C, D, or E