Sigma – Configuring 0–20 mA Outputs on New Surface Mount Analogue Output Boards

[Product_Support]

Issue

How to configure the new surface mount Analogue Output boards to provide a 0–20 mA control signal instead of the default 0–10 V output.

Product Line

Satchwell BAS & Sigma

Environment

• Sigma UNCX96 Outstations
• New style surface mount Analogue Output boards

Cause

Some connected field devices require a 0–20 mA signal for proper operation. The new AO boards support both 0–10 V and 0–20 mA outputs but require manual configuration to switch between these modes.

Resolution

To configure the AO board for 0–20 mA output:

1. Identify Channels:

   • Only Channels 15 and 16 on the new surface mount AO board support 0–20 mA output.

2. Locate Link LK1:

   • On the AO board, find the LK1 jumper associated with each channel.

3. Set Output Mode:

   • To enable 0–20 mA output, move the LK1 jumper to the 0–20 mA position.
   • To revert to 0–10 V output, place the jumper back to the 0–10 V position.

⚠️ Important: Ensure power is turned off before adjusting the jumper settings to avoid damage or incorrect configuration.