B&B Electronics ZZ24D-NA(NB,NC,ND)-SR - Manual - Manual (Page 38)

Setup
32 Manual Documentation Number: pn7515_ZlinxIO-0712m
4 4 . . S S e e t t u u p p
4.1 Zlinx Wireless I/O Installation
4.1.1 Power Supply Requirements
Zlinx Wireless I/O systems can be powered from DC or AC power sources. No supply is included since the power rating of the
supply will depend on the total power requirements of all modules used in the system.
NOTE: “Appendix B: Product Specifications” contains a listing of power
requirements for all Zlinx Wireless I/O modules.
If an AC power supply is to be used, it must be 24VAC.
If a DC power supply is to be used, it must be 10-40VDC.
NOTE: 110/220/240 VAC mains power must NOT be connected to any input
terminal on Zlinx Wireless I/O modules.
4.1.2 RF Site Considerations
When installing any radio equipment it is important to give careful consideration to the installation location and the surrounding
area. Radio transmission and reception is affected by absorption, reflection and refraction of the radio signals. These factors
are determined by the distance between the transmitting and receiving antennas, the type, position and amount of
obstructions, antenna heights, frequency band and RF power used, and other factors.
There are several ways to optimize the RF environment to ensure satisfactory performance. A partial list of these follows:
 Select the Zlinx Wireless I/O radio option that provides sufficient power for your application. Lower frequencies travel
farther and are less affected by absorption in materials. Higher power levels generally provide greater penetration
through objects.
 Select installation locations that come as close as possible to providing LOS access between Base Modules.
 Avoid installation locations where metal objects may block, reflect, refract or cause multipathing of radio frequencies.
In some cases reflections may enhance reception but in others it can cause problems. Some experimentation may
be necessary.
 Select installation locations to increase antenna heights.
 Select equipment enclosures made of materials that minimize RF attenuation.
 Avoid locations with other radio equipment that may cause interference.
 In some cases alternate types of antennas (more directional) or remote antenna mounting (outside of enclosures or
at a higher elevation) may be required.
Most importantly, some research and testing of the proposed installation location(s) should be carried out. Sometimes small
changes in location can make a significant improvement to coverage. For RF information see section 2.5 “Radio Frequency
Basics”.