ZFR1800 Series Wireless Field Bus System Technical Bulletin18
Detailed Procedures
Designing and Planning the ZFR1800 Series Wireless Field Bus
System
To ensure that the system is well-designed with good line-of-sight communication
paths and distances, see Location and Estimating Guidelines for planning
guidelines and restrictions before designing the system.
In designing and planning the system, pay special attention to these points:
• Every WRZ Sensor should be within 15 m (50 ft) (recommended) of at least
two ZFR1811 Routers.
• Every ZFR1811 Router should be within 15 m (50 ft) (recommended) of at
least two other ZFR1811 Routers.
• The ZFR1810 Coordinator should be within 15 m (50 ft) (recommended) of at
least two ZFR1811 Routers.
• If any WRZ Sensor, ZFR1811 Router, or ZFR1810 Coordinator is not within
15 m (50 ft) (recommended) of at least two other ZFR1811 Routers, then use
ZFR1811 Routers and ZFRRPT Repeater accessories to function as repeaters
to serve this purpose of providing multiple wireless data pathways.
Note: WRZ sensors do not act as repeaters in the ZFR1800 Series Wireless
Field Bus System.
• The maximum distance between the ZFR1810 Coordinator and the farthest
ZFR1811 Router/Repeater should be less than 76.2 m (250 ft).
• Transmissions may use up to ten hops to transmit the signal to the coordinator;
transmissions that require more than ten hops can not reach the coordinator due
to network restrictions. A hop is any time a signal (information packet) moves
from one wireless device in the network to another wireless device in the
network.
IMPORTANT: For special precautions regarding installing of a ZFR1800
Series system in a hallway, see Appendix C: Restricted Hallway Scenario.
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