Z-World Jackrabbit, Getting Started Manual

Getting Started Manual

7

digital I/O cables. Your results may vary, depending on your application, so additional 
shielding or filtering may be needed to maintain the Class B emission qualification.

NOTE:

If no ferrite absorbers are fitted, the Jackrabbit boards will still meet 

EN55022:1998 Class A requirements as long as the spectrum spreader is turned on.

The spectrum spreader is on by default for Jackrabbit models BL1810 and BL1820. The 
spectrum spreader is off by default for the Jackrabbit model BL1800, and must be turned 
on with at least one wait state in order for the BL1800 model to be CE-compliant. Section 
2.7.3 in the 

Jackrabbit (BL1800) User’s Manual

 provides further information about the 

spectrum spreader and its use, and includes information on how to add a wait state.

1.4.1  Design Guidelines

Note the following requirements for incorporating the Jackrabbit series of single-board 
computers into your application to comply with CE requirements.

General

•

The power supply provided with the Development Kit is for development purposes 
only. It is the customer’s responsibility to provide a CE-compliant power supply for the 
end-product application.

•

When connecting the Jackrabbit single-board computer to outdoor cables, the customer 
is responsible for providing CE-approved surge/lightning protection.

•

Z-World recommends placing digital I/O or analog cables that are 3 m or longer in a 
metal conduit to assist in maintaining CE compliance and to conform to good cable 
design practices. Z-World also recommends using properly shielded I/O cables in noisy 
electromagnetic environments.

•

When installing or servicing the Jackrabbit, it is the responsibility of the end-user to use 
proper ESD precautions to prevent ESD damage to the Jackrabbit. 

Safety

•

For personal safety, all inputs and outputs to and from the Jackrabbit series of single-
board computers must not be connected to voltages exceeding SELV levels (42.4 V AC 
peak, or 60 V DC). Damage to the Rabbit 2000 microprocessor may result if voltages 
outside the design range of 0 V to 5.5 V DC are applied directly to any of its digital 
inputs.

•

The lithium backup battery circuit on the Jackrabbit single-board computer has been 
designed to protect the battery from hazardous conditions such as reverse charging and 
excessive current flows. Do not disable the safety features of the design.

1.4.2  Interfacing the Jackrabbit to Other Devices

Since the Jackrabbit series of single-board computers is designed to be connected to other 
devices, good EMC practices should be followed to ensure compliance. CE compliance is 
ultimately the responsibility of the integrator. Additional information, tips, and technical 
assistance are available from your authorized Z-World distributor, and are also available 
on our Web site at www.zworld.com.