A-Bus Wiring; Fig.12 - Z11/Z12 Relay Pcb And Z13/Z14 Digital I/O Pcb Wiring; Fig.13 - Z15 Sounder Pcb Wiring - C-TEC CAST ZFP Installation, Maintenance & Operating Manual

CAST ZFP Analogue Addressable Fire Alarm Panel
6.6

A-Bus Wiring

A-Bus wiring must be installed in accordance with all applicable national, regional or local standards In the
UK this is BS 7671 IET Wiring Regulations and BS 5839-1, Fire detection and alarm systems for buildings: Code
of practice for system design, installation and maintenance. See Cabling Requirements, section 4.
Note that alternative power supply connections to those shown below are available on the A-Bus PCBs.
Fig.12 – Z11/Z12 Relay PCB and Z13/Z14 Digital I/O PCB Wiring
Fig.13 – Z15 Sounder PCB Wiring
Note: The Z15 terminal labelled 'Ex' is used to report a fault from the AUX (external) PSU. It is triggered from an active
IO signal from an open collector (O/C), or volt-free (with 0V common) relay O/P. If an AUX (external) PSU is not used,
a link must be fitted between PCB terminals labelled 'Ex' and '0V'. Correct polarity must be observed.
Installation and Programming Manual  Approved Document No. DFU5030000 Rev 4  Page 26 of 60
Hint! C-TEC supply a range of power
supplies, third-party certified to EN 54-4/A2
which may be used for the AUX PSU.
Refer to www.c-tec.com for details.