EQUIPMENT: FIRECLASS Prescient III WRITTEN BY: RKP
PUBLICATION: OMFCPRES3IN CHECKED BY: AP
ISSUE No. & DATE: 0 02/02/12
PAGE 27 of 43
NOTES:
1. Detector quantities are based on the use of a 22uF capacitor as the end-of-line device, except for
intrinsically safe devices, in which case the EOL is a 10k resistor.
2. If the DIL switch option „3K9 EOL‟ is selected, then the maximum number of detectors per zone will be
reduced. In this case the maximum detector current in standby should not exceed 2.3mA. As a general
rule the quantities shown above should be halved.
3. Detector models not listed above may be compatible if electrically similar to the above devices. Consult
your supplier for advice.
4. All break glass units (call points) must have a resistor fitted to them to produce an alarm condition on the
panel. Any value between 100 Ohm and 680 Ohm is acceptable. Please check with your supplier if you
are not sure.
5. It is not permitted to connect more than 32 devices to any zone (EN54 recommendation).
6. Zones 1 & 2 should only have automatic detectors fitted.
7. The Manual Release circuit is not a detection zone and therefore should only have MCPs fitted.
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