ZP3 Fire Control Panel Installation, Commissioning and Maintenance Manual
Page 52
REV 11 (ISS 08/03/2010)
Z-Loop
Z-Loop wiring
See Figure 43. The addressable Z-Loop can be wired as a class-A return loop, or as class-B single
direction wiring, with spurs. Loop length can be up to 3000 metres, depending upon the type,
quantity and location of devices attached. For more information see
Z-Loop parameters
on page
53.
Figure 43: Z-Loop wiring
When wired in class-B single direction format, then the loop terminals must be connected (+) in to
(+) out and (-) in to (-) out.
The loop is monitored for open and short circuit. Unused loops must be terminated (+) in to (+) out
and (-) in to (-) out.
Loop isolators
For information on loop isolators, see under “
Line isolators
” in Appendix A of this manual.
