 |
DA225
Setting Inhibitor. This unit was originally designed to inhibit setting of an intruder alarm system after an alarm activation. With its double pole key switch, double pole relay and LED, it can be used in many other applications where a relay and key switch are required. 12V DC operation. Plastic cased.
Technical Information |
 |
DA228
A handy high security key switch with DPCO (Double Pole Change Over) contacts housed in a die-cast aluminium box with security screws, complete with LED and tamper connections. Can be used to override maglocks / electronic releases in the event of an access control system failure. 12V DC operation.
Technical Information |
 |
DA250U
Safe Shunt Unit (Zone Omit). This unit is used to switch out (shunt) an active security system circuit thus allowing controlled access to a secure area. It is controlled by a remote, key-operated switch fitted outside the secure area. This switch is usually a mortice deadlock or a contacted lockplate fitted with a contact which operates when the bolt is thrown (Dantech part no DA223). This prevents false alarms as access to the secure area is only possible once the door is unlocked and the circuit is shunted.
The unit has separate alarm and tamper input loops and separate alarm and tamper output relays. An on-board sounder and Green LED give audible and visual indication of the state of the shunted circuit.
The shunted zone can only be switched back in if the alarm circuit is clear. An output is available to provide remote indication whilst the unit is shunted. 12V DC operation. Metal Cased.
Technical Information |
 |
DA250LS
As the DA250U but with a built-in key operated switch in place of the remote key operated switch, and an additional Red LED which indicates whilst the key operated switch is in the shunted position.
Technical Information
|
