PPC12-427/Best Practices
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Appendix A. Best Practices
The following paragraphs outline the best practices for operating the
PPC12-427 in a safe, effective manner, that does not damage the panel
PC. Read this section carefully.
Power Supply
Power Supply Budget
Evaluate your power supply budget. Recommended maximum power
supply input rating for the PPC12-427 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
panel PC's typical load is not lower than the power supply's minimum
load. If the panel PC 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 PPC12-427.
Power Harness
Minimize the length of the power harness. This reduces the amount of
voltage drop between the power supply and the PPC12-427.
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 PPC12-
427. Measuring it at the power supply does not account for voltage drop
through the wire and connectors.
The PPC12-427 requires 10V to 50V to operate. Verify the power connections.
Incorrect voltages can cause catastrophic damage.
The PPC12-427 has a single power connector at J20. A single 10V-50V DC input
and ground is required to power the panel PC.
