Revision 1.2a
Page 7 of 25
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
Mercury 2 & Intuitive Mercury EPR Stepper Installation
Guide
www.resourcedm.com
Intuitive Mercury Stepper Valve with Daughter Board Option
The Intuitive Mercury EPR Stepper Valve controller can be purchased with optional daughter boards to read suction pressure which is
then used to calculate evaporator temperature and superheat, this is used for monitoring purposes only and does not have any control or
alarm functionality.
Please note the daughter boards are a factory fit option only and must be ordered with the controller
Note:
Only 0
– 10V or 4 – 20mA Inputs used in this application (Outputs are not used)
*Each daughter board comes with a colour coded connector as a visual indication.
Daughter Board Connection Details
Note:
“PWR” is a constant voltage output for external equipment, supply voltage is dependent on the board type, see the specification
section for more details. GND is a common ground for all inputs and outputs.
Ordering Information
When ordering a Mercury Intuitive controller the following ordering scheme can be used to purchase the desired hardware configuration.
This ensures the controller ships with the optional hardware pre-fitted.
PR07
X
1-EPR-
Y
-
Z
Where
X
,
Y
and
Z
are selections from the tables below.
* Fitted by default.
** If no daughter card required leave field blank
Example
– To order a remote display variant, with a built in IP module and a 4 – 20mA board use the following part number: -
PR07
6
2-EPR-
IP
-
AiAo
Daughter Board Options
Connector Colour *
1 x 0-10Vdc Input & 1 x 0-10Vdc Output board
Blue
1 x 4-20mA Input & 1 x 4-20mA Output board
Black
1 x 0-10Vdc Input & 1 x Probe Input Expansion board
Blue
1 x 4-20mA Input & 1 x Probe Input Expansion board
Black
X
Description
5
Internal Display
6
Remote Display
Y
Description
RS232*
IP
IP Interface
RS485
RS485 Interface
Z
Description
No Daughter Card**
Vi/Vo
1 x 0-10Vdc Input & 1 x 0-10Vdc Output
Ai/Ao
1 x 4-20mA Input & 1 x 4-20mA Output
1P/Vi
1 x Probe Input & 1 x 0-10Vdc Input
1P/Ai
1 x Probe Input & 1 x 4-20mA Input
Daughter card location (Optional)
2B
2A
1A
1B
Stepper Output
1 x 0-10Vdc Input &
1 x 0-10Vdc Output
1 x 4-20mA Input &
1 x 4-20mA Output
1 x 4-20mA Input &
1 x Probe Input
1 x 0-10Vdc Input &
1 x Probe Input
