User’s Manual
7
1.5.1 Design Guidelines
Note the following requirements for incorporating the LP3500 series of single-board com-
puters into your application to comply with CE requirements.
General
The power supply provided with the Tool 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 LP3500 to outdoor cables, the customer is responsible for provid-
ing CE-approved surge/lightning protection.
Rabbit 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. Rabbit also recommends using properly shielded I/O cables in noisy
electromagnetic environments.
Safety
For personal safety, all inputs and outputs to and from the LP3500 must not be con-
nected to voltages exceeding SELV levels (42.4 V AC peak, or 60 V DC). Damage to
the Rabbit 3000 microprocessor may result if voltages outside the design range of 0 V
to 40 V DC are applied directly to any of its digital inputs.
The lithium backup battery circuit on the LP3500 has been designed to protect the bat-
tery from hazardous conditions such as reverse charging and excessive current flows.
Do not disable the safety features of the design.
1.5.2 Interfacing the LP3500 to Other Devices
There are two versions of the LCD/keypad module that may be used with the LP3500:
without a bezel (Part No. 101-0601), and a remote panel-mounted version with bezel (Part
No. 101-0541). The cable used to connect the LCD/keypad module should be less than 30
cm (12") to maintain CE compliance.
Appendix C provides complete information for
mounting and using the LCD/keypad module.
Since the LP3500 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 Rabbit distributor, and are also available on