How to Split Gas Detector Outputs for Monitoring & Process Control Application Note
Defining the Problem:
At a remote wastewater pumping station, Methane (CH4) and Hydrogen Sulfide (H2S) are monitored with MSA X5000 Gas Monitors. The 4-20mA outputs must be split to a GasCard XL Controller and Emerson Ovation I/O. The Controller has powered inputs but the Ovation inputs require an external power source. Typical splitters have 2 outputs that are identically powered: either both are sinking or both are sourcing. We need a splitter with independent outputs to interface with our instrumentation.
The SP family of splitters can be powered by any low voltage DC supply, 9-32V. Loop powered models include 2 independent and isolated outputs that can be wired as either sinking or sourcing to the loads. USB configuration via the Acromag Agility mobile application for Android devices or with a Windows PC.
Implementing the Solution:
- Download the Agility mobile application from the Google Play Store or Windows software from Acromag.
- Configure the module. Scale the input and output ranges independently for normal or reverse acting outputs. Add programmable output clamps or Namur compliant limits if needed.
- Wire each output for sinking or sourcing power to the load.
- Review manual to apply earth ground for best practice wiring.
One splitter module eliminates having two separate modules that would increase the wiring and cost.
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