Securitron BPS-12_24-1 - Manual (Page 3)

PN# 500-21900
Page 3 Rev. F, 06/11
breaker. If it receives an overload, it rapidly cuts the current down to a small leakage current
(about 100 mA). If this happens there is a reset procedure. All current must be removed
from the Polyswitch for a period of 10 seconds. You do this by simply disconnecting the
wire from the “+” or “-” terminal. If, for example, a short circuit appeared which tripped the
Polyswitch and you corrected the short but did not disconnect the wire from the “-” terminal, the
Polyswitch would “see” the normal load and would continue to block current flow until reset in
the manner just described.
3.6 INSTALLATION CLEARANCE
Adequate space must be provided for power supply ventilation. Be sure there is at least 2
inches of unobstructed space provided around the side of the power supply.
The enclosure is provided with knockouts for conduit connection. Use upper knockouts for High
Voltage AC wire routing and the lower knockouts for Low Voltage DC wire routing.
Fuse
Neutral
1A/250VAC
AC Fail Sense Output Battery Terminals
Figure 2: Wiring
3.7 EMERGENCY RELEASE
Emergency release of DC output at the power supply is most
easily accomplished by using the unconnected "F" terminal.
Connect the NC contacts of the release switch between "+" and
"F" and then connect the load to "-" and "F". When the
emergency release contacts open, all DC power will be cut off.
When the connection is to a UL listed fire alarm system, use
auxiliary latching normally closed contacts. Do not use
"trouble" contacts. Note the drawing to the right.
F
NORMALLY
CLOSED
SWITCH
CONNECT "+" DC
LOAD TO "F"
TERMINAL WHEN
ADDING SWITCH
FOR EMERGENCY
RELEASE
Cover
LED
Hot Earth