Maple Systems HMI5043DL, Installation Manual

HMI5000L Installation Guide                                                                                                5

1010-1018 Rev 13                                                                          www.maplesystems.com

Cable Routing and Noise Immunity

Follow these guidelines when routing cables to the HMI:

•

Always route the HMI communication cable and the power cable 
away from any AC voltage or rapidly switching DC control lines.

•

Never bundle the HMI cables together with 120VAC power wires 
or with relay wiring.

•

Try to keep at least 8 inches (20 cm) of separation between the 
HMI cables and other power wiring. If voltages greater than 
120VAC are used in the system, greater separation is required.

•

If the HMI cables must come near AC wiring, make sure they 
cross at 90 degrees.

•

Run AC power wires in a separate grounded conduit to reduce 
electrical noise interference.

•

Keep the cable lengths for the HMI as short as possible. Do not 
coil excess cable and place it next to AC powered equipment.

•

Cover any equipment used in the enclosure that operates at high 
frequency or high current levels with a grounded metal shield.

Power Supply Selection 

The power supply used to power the HMI should provide an output of at 
least 

+24 VDC ±20%

 measured at the HMI power connector 

(

HMI5043Lv2, HMI5043LBv2 should be powered with +22~28VDC only

, and 

HMI5043DL should be powered with

+10.5~28VDC only

).

A DC regulated power supply 

dedicated to the HMI

 is recommended. 

Use a power supply with adequate current rating for the provided 
voltage. A power line filter installed at the AC input to the HMI power 
supply is highly recommended as a safeguard against conducted RF 
noise, which is often present on factory power lines. The wires 
connecting the output of the power line filter to the power supply should 
be kept as short as possible to minimize any additional noise pickup. The 
case of the power line filter should be connected to a quiet earth ground. 
The power line filter should have a current rating of at least 3 Amps with 
common mode and differential mode attenuation. 

In applications that may have high frequency noise present, a resistor 
(~1 

MΩ)

 and capacitor (~4700 pF) should be used in parallel to clean 

earth ground on the DC output of the power supply.

Do not use the power supply used to provide power to the HMI to power 
switching relays, solenoids, or other active devices.