Tyco F3200 manual USE of Actuators, Connecting Multiple Actuators

F3200 Installation & Programming Manual	Document No: LT0122
Applications

NOTES (CONTINUED)

9.If a Lock-off valve is not required, then Z7 is not required and can be left out of the equations. Note that AS4124.1 requires the Lock-off Valve to isolate both poles of the Gas Release solenoid / actuator. This is not done within the ME wiring and would therefore need to be done externally with microswitches (or a relay).

10.The standard LCS Gas Start switch automatically turns on when the glass is broken. Some customers may require a different switch that can be turned off after the glass is broken, and hence cancel the timer and prevent gas release.

9.2.4USE OF ACTUATORS

Where a CV-98 actuator is used it must be connected in series with the 427354 current regulator, fitted at the furthest point to act as the EOL. Where series resistors have been used (in existing circuits) to limit the current, a series diode must be fitted as the EOL. It must be a silicon diode (not Schottky) rated at 1Adc or greater, e.g. 1N5404. See Fig 9.2.4. A single actuator should be connected in reverse, i.e. with the black wire to the incoming +ve voltage, so that the supervision can detect that the element has been fired.

Multiple actuators may be connected in series on one circuit, but each must have the red wire to the incoming +ve voltage. Note the supervision cannot detect the difference between an unfired element (<2 Ohm) and a fired one (3 series forward diodes).

a)With current regulator at furthest point (EOL)

b)With limiting resistor (not recommended method).

FIGURE 9.2.4

CONNECTING MULTIPLE ACTUATORS

Page 9-12 5 July 2001 Issue 2.7