Ziton ZP3, Installation Operation & Maintenance

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ZP3 Fire Control Panel
ZP Wiring Guide
ZP3 Fire Control Panel Manual
Page W - 16 UD1160.W Iss 6 (25/02/2005)
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4.3 RS485/RS422 Ports
Used for connections between ZP panels and ZP equipment. For example, between
networking panels in a multi-panel system, from a panel to a remote display unit, to an
intelligent mimic panel, etc. RS485/RS422 is sometimes used to connect to computers.
A single circuit may interconnect several pieces of equipment.
4.3.1 Rules for RS485/RS422 cabling
1. Cable requires 2 conductors plus a shield. The cable is terminated at each end to a 9
pin "D" connector, or onto terminals, depending upon the equipment.
2. The shield must be insulated, and connected only at the points shown on the system
installation drawing. If the shield is not insulated, and could be earthed, then a 3-
conductor cable is required. The third wire will serve the function of the screen.
3. Only cable specifically manufactured for RS485/RS422 should be used. This is an
ultra low capacitance cable with capacitance of 0.04µf/1000 metres.
4. The conductor size, when using shielded cable with a capacitance of 0.04µf/1000
metres, should be as follows:
0.25mm
2
- up to 1000 metres
0.5mm
2
- 1000 to 2000 metres
5. No cables or conductors for other services must be run inside the same shielding.
6. Maximum communication distance of 2000 metres. If greater distances are required,
please contact Ziton.
7. Where wiring connects to several panels or devices, it must be daisy-chained from
point to point, (not connected in a star pattern).
5 Parallel Communications Lines
5.1 General
These are data lines used to convey digital communication between control panels and ZP
accessory boards, and printers.
Parallel wiring consists of multicore conductor cable or ribbon cable, and is designed for very
short distance communication.
Two types of parallel communication ports are used on ZP panels. These are Z-Bus and
Centronics.
Z-Bus Ports use a twenty six way ribbon cable to inter-connect ZP equipment.
Centronics Ports use a twenty way multicore cable, or ribbon cable, used to connect to
printers.