RDM Intuitive Mercury Mini Pack / Condenser Controller

The Mercury Mini Pack controller is primarily intended for use in Compressor Pack and/or Condenser fan control applications. The

controller has 5 relay outputs that are configurable as Compressors, Condenser Fans or Inverter Enable. The controller has 6 inputs

which can be assigned as a Stage Input, General Alarm, Standby Mode or Temperature Probe. Pressure can be read in either by utilising

a suitable mA or Voltage daughter board as well as providing a variable output to control an inverter drive. There is also a hardware

option with a SSR (solid state relay) fitted which allows control of a digital scroll compressor.

The controller operates a staged logic control algorithm which allows the user to specify the order of relay switching as the control

pressure increases and decreases.

Hardware Variants and Ordering Information

When ordering a Mercury Intuitive controller the following ordering scheme can be used to purchase the desired hardware configuration.

If the controller is required to use a 4-20mA (milliamp) pressure transducer then a daughter card with a mA input is required, similarly if it

is a 0-10v transducer then a Voltage In daughter card must be selected. If two pressure transducers are required then only a 2 x Vin card

can be used and the transducers must be of the voltage input type.

If a variable output is required to control the speed of an inverter drive then a Vi/Vo or Ai/Ao daughter card must be selected.

PR07VW-MPA-X-Y-Z Where V, W, X, Y and Z are selections from the tables below.

V Description

W Description

X Description

Y Description

5 Internal Display

0 Relay 1 Mechanical

Relay 2 Mechanical*

RS232*

6 Remote Display

1 Relay 1 Solid State

2E Relay 2 Solid State

IP IP Interface

Z Description

Vi/Vo 1 x 0-5V/0-10Vdc Input & 1 x 0-5V/0-10Vdc Output

2xVi 2 x 0-5V/0-10Vdc Inputs

Ai/Ao 1 x 4-20mA Input & 1 x 4-20mA Output