SYS-427/Best Practices
v1.0
www.winsystems.com
Page 36
Appendix A. Best Practices
The following paragraphs outline the best practices for operating the SYS-
427 in a safe, effective manner, that does not damage the embedded
computer. Read this section carefully.
Power Supply
Power Supply Budget
Evaluate your power supply budget. Recommended maximum power
supply input rating for the SYS-427 is 95 W.
Zero-load Power Supply
Use a zero-load power supply whenever possible. A zero-load power
supply does not require a minimum power load to regulate. If a zero-load
power supply is not appropriate for your application, then verify that the
embedded computer's typical load is not lower than the power supply's
minimum load. If the embedded computer does not draw enough power
to meet the power supply's minimum load, then the power supply does
not regulate properly and can cause damage to the SYS-427.
Power Harness
Minimize the length of the power harness. This reduces the amount of
voltage drop between the power supply and the SYS-427. Recommended
DC power input wires/cable with a flammability rating of VW-1 or better.
Avoid Electrostatic Discharge (ESD)
Only handle the circuit board and other bare electronics when electrostatic
discharge (ESD) protection is in place. Having a wrist strap and a fully grounded
workstation is the minimum ESD protection required before the ESD seal on
the product bag is broken.
Use Proper Power Connections (Voltage)
When verifying the voltage, measure it at the power connector on the SYS-427.
Measuring it at the power supply does not account for voltage drop through
the wire and connectors.
The SYS-427 requires 10 V to 50 V to operate. Verify the power connections.
Incorrect voltages can cause catastrophic damage.
The SYS-427 has a single power connector at J20. A single 10 V to 50 V DC input
and ground is required to power the embedded computer.
