Installation guide

Warning
Please Note
The specifications of the product detailed on this
Set-Up Guide may change without notice. RDM
Ltd. shall not be liable for errors or for incidental
or consequential damages, directly and indirectly,
in connection with the furnishing, performance or
misuse of this product or document.
Ensure that all power is
switched off before
installing or maintaining
this product
Revision 2.7 Page 9 of 83
Mercury Plant Controller Installation Guide
Universal IO
Setting up from controller display, navigate to the screen “Uni” and select from the following table for U-01 to U-08.
This selects what the Universal IO (U-01 to U-08) can be set for.
NOTE: UniIO U-01 to U-03 can only be set as Inputs, UniIO U-04 and U-05 can only be set for Outputs and UniIO
U-06 to U-08 are seen in settings but are not present on the controller hardware and are for future development.
U-01 to U-03 (Variable Inputs) can be set to 0, 1 or 2.
U-04 and U-05 (Variable Outputs) can be set to 3, 4, 5 or 6.
U-06 to U-08 do not use.
0. 4-20mA Input
1. 0-10V Input
2. 0-5V Input
3. 4-20mA Output
4. 0-20mA Output
5. 0-10V Output
6. 0-5V Output
Input Type
The 3 analogue inputs can be set individually to either of the following,
0. 4 – 20mA Input (Default)
1. 0 – 10Vdc Input
2. 0 – 5Vdc Input
Output Type
The 2 analogue outputs can individually be set to either of the following: -
3. 4 – 20mA Output (Default)
4. 0 – 20mA Output
5. 0 – 10V dc Output
6. 0 – 5Vdc Output
Status Input Type
Navigate to the screen “StA”
Selects whether the status inputs require a 0V return or 24Vac return signal See: Note 1
Select 1 for Input type 0V return
Select 2 for Input type 24V ac return