Learn about the Community. Join our Core Community to Get Started

Schneider Electric Exchange Community

Discuss and solve problems in energy management and automation. Join conversations and share insights on products and solutions. Co-innovate and collaborate with a global network of peers.

Register Now
Knowledge Base
cancel
Showing results for 
Search instead for 
Did you mean: 

DUI expander not reading inputs correctly on an MNL-800

Issue

We have installed some DUI-5R modules on MNL-800's . The LED indications on the DUI's follow the contact closure signals connected to them, but the
values being read based on those status points do not match. Eg. DUI-5 has led's on for inputs 1, 3, and 5 however the controller values have 1 and 5 on only.

Environment

WorkPlace Tech

MNL-800

Cause

MNL-800 Inputs require an external parallel resistor (Rp=22.1 kohms, 1%) be placed across the UI input to which the DUI is attached. Some DUI models may incorporate this resistor that may be either switch or jumper selected.

Resolution

MNL-800 Inputs require an external parallel resistor (Rp=22.1 kohms, 1%) be placed across the UI input to which the DUI is attached. Some DUI models may incorporate this resistor that may be either switch or jumper selected.

For example the DUI-5R available in Asia Pacific notes the following:

Switch 1 set to ON for MNL-800 and OFF for all other controllers. In some models the switch is replaced by a jumper. Bridge the jumper for MNL-800s and leave open (jumper on one pin only) for all other MNL controllers.

Tags (1)
Labels (1)
No ratings