8 D0559 Rev. A SlideDriver/SlideDriver 50VF Series www.hysecurity.com
CHoosIng seCondarY entrapment proteCtIon
The site designer or installer must determine which secondary entrapment sensor devices will be installed with
the SlideDriver operator to meet UL compliance. The type of entrapment sensor device systems are described
below. For a complete listing of the requirements, refer to UL 325 Safety Standards.
NOTICE: SlideDriver is equipped with a primary, Type A, inherent entrapment sensor (IES) that complies with
UL 325. Any impediment to gate travel causes the gate to stop and reverse.
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
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 SlideDriver 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 Inicting
Injury or Death - Do Not Start the Gate Unless the Path is Clear” must be placed adjacent to the gate
operator controls.
While compliance is possible with Type C, which is a low force limiting clutch, the SlideDriver operator does not
utilize a clutch, therefore this option is not available.
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.
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