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 7 of 83
Mercury Plant Controller Installation Guide
Input/s & Outputs
All Types
Description
Comments
Digital Input 1
0V return or 24 Vac
Note 1
Digital Input 2
0V return or 24 Vac
Digital Input 3
0V return or 24 Vac
Digital Input 4
0V return or 24 Vac
Digital Input 5
0V return or 24 Vac
Digital Input 6
0V return or 24 Vac
Digital Input 7
0V return or 24 Vac
Digital Input 8
0V return or 24 Vac
Digital Input 9
0V return or 24 Vac
Digital Input 10
0V return or 24 Vac
Digital Input 11
0V return or 24 Vac
Digital Input 12
0V return or 24 Vac
Analogue Input 1
Probe input
Note 2
Analogue Input 2
Probe input
Analogue Input 3
Probe input
Analogue Input 4
Probe input
Analogue Input 5
Probe input
Analogue Input 6
Probe input
Analogue Input 7
Probe input
Analogue Input 8
Probe input
Variable Analogue Input 1
Analogue input
4-20mA, 0-5V or 0-10V Input See note 3
Variable Analogue Input 2
Analogue input
Variable Analogue Input 3
Analogue input
Variable Analogue Output 1
Analogue output
4-20mA, 0-20mA, 0-5V or 0-10V Output
Variable Analogue Output 2
Analogue output
Relay 1
N/O, N/C and Common
Volt Free
Relay 2
N/O, N/C and Common
Volt Free
Relay 3
N/O, N/C and Common
Volt Free
Relay 4
N/O, N/C and Common
Volt Free
Relay 5
N/O, N/C and Common
Volt Free
Relay 6
N/O, N/C and Common
Volt Free
Relay 7
N/O, N/C and Common
Volt Free
Relay 8
N/O, N/C and Common
Volt Free
Relay 9
N/O, N/C and Common
Volt Free
Relay 10
N/O, N/C and Common
Volt Free
Relay 11
N/O, N/C and Common
Volt Free
Relay 12
N/O, N/C and Common
Volt Free
Status LED
Healthy LED
When powered up the LED will flash off/on every 0.5
seconds. Note 3
Note 1: 24 Vac must have the same 24 Vac return as the supply voltage. If using the Plant controller 24V power
supply only the 24Vac signal from the supply is required for the digital input.
Do not connect the 0V from the power supply to the digital input common. See Appendix 3 for digital Status input
connection wiring. If the Status LED is present then Appendix 3 is not relevant. See appendix 4.
If using an external 24V power supply to signal a status change then both a common (0V) and status input signal
(24V) is required for the appropriate digital input. See Appendix 3 for digital Status input connection wiring. If the
Status LED is present then Appendix 3 is not relevant. See appendix 4.