Installation Guide

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Installation guide

Industrial Refrigeration Evaporator Control Panels

PXE 02 & PXE 04

AN383426363919en-000101 | 1

PXE 02: Component layout

For comprehensive wiring details please refer to the detailed wiring diagram that is delivered complete with the PXE 02 panels.

1. EKE 400 Controllers

2. Gas detector relays

3. MCBs

4. Power supplies

5. Fuses

6. Gas detector

7. Internal PE

8. Gas detector terminals

9. Digital input relay terminals

10. A) Gas detection RS485 terminal

B) EKE 400 controller’s RS485 terminals

11. Gas detection analog outputs

12. Analog inputs

13. Analog outputs

14. Optional motorized valve power

15. DIN rail for accessories (side of panel)

16. Fan and heater (side of panel)

17. Rail for wire organization

18. Baseplate (see baseplate layout diagram below)

Fig. 01

Summary of content (16 pages)

PAGE 1
Installation guide Industrial Refrigeration Evaporator Control Panels PXE 02 & PXE 04 PXE 02: Component layout For comprehensive wiring details please refer to the detailed wiring diagram that is delivered complete with the PXE 02 panels. Fig. 01 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.
PAGE 2
PXE 02: Baseplate layout Fig. 02 A B B C A - Type SKINTOP MULTI Version 1 – Maximum number of cables – 22 including 6x8-12 mm; 16x3-7 mm B - Type SKINTOP MULTI Version 5 with SKINTOP BRUSH ADD-ON 24 for EMC screen contact Maximum number of cables – 27 including 27x4-8 mm C - Type SKINTOP ST-M M20 – Gas detector sensor cable. Note: 1. To ensure an optimum strain relief, the cable bundle can be fixed with help of a cable tie 2.
PAGE 3
PXE 04: Component layout For comprehensive wiring details please refer to the detailed wiring diagram that is delivered complete with the PXE 04 panels. Fig. 04 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.
PAGE 4
PXE 04: Baseplate layout Fig. 05 A A B B C A – Type SKINTOP MULTI Version 1 – Maximum number of cables – 22 including 6x8-12 mm; 16x3-7 mm B – Type SKINTOP MULTI Version 5 with SKINTOP BRUSH ADD-ON 24 for EMC screen contact Maximum number of cables – 27 including 27x4-8 mm C - Type SKINTOP ST-M M20 - GDA Sensor Cable Note: 1. To ensure an optimum strain relief, the cable bundle can be fixed with help of a cable tie 2.
PAGE 5
External wiring considerations: Power supply, Signal wiring and Fieldbus • 230 V cabling to and from the panel, the cable glands should be fed with Ø6-11 mm overall nominal diameter cable with conductor areas 0.75-1.5 mm. For low voltage signal to and from the panel should be made with Ø6 mm overall nominal diameter cables with conductor areas 0.75 mm.
PAGE 6
Quick startup – With CoolConfig software tool What you will need: CoolConfig software. USB to RS-485 cable. Power to your control panel. Step 01: Ensure the latest version of CoolConfig is installed on your PC. Link to CoolConfig download: Link Step 02: Each controller is to be configured individually. After power up, connect your RS485-USB cable from your PC to the terminal labelled X107 on the PXE 02 or X107 on the PXE 04. The controllers are RS-485 pre-wired in series. Fig.
PAGE 7
Table. 03 EKE 400 controller’s default comm settings Baud rate 38.400 bps Parity even Data bits 8 Stop bit 1 Start bit 1 Step 05: Commence controller configuration. Start with either opening a previously configured file from the dropdown menu FILE and choosing OPEN or start with configuring a new application by choosing the VALVE CONFIGURATION tab. Other tabs and applications drawings will appear after making a choice in the VALVE CONFIGURATION tab.
PAGE 8
Fig. 14 MAN SELECTION Step 04: Next, highlight and select (return ↵ button) “MAN SELECTION” Fig.
PAGE 9
Panels with Gas Detection Gas Detector cable and sensor The gas detector remote sensor is supplied detached from the gas detection unit and must be connected after mounting. An M25 gland in the right side of the enclosure bottom plate is reserved for the remote sensor unit cable. Mount the remote sensor unit and connect the cable as outlined in the final pages of the panel schematics. Fig.
PAGE 10
Gas Detector factory default settings – NH₃ PPM alarm settings The gas detector will activate an alarm if there is an error detected or if there is a power failure to the unit. The gas detection units also come with factory default 2-step alarm set-up ready for use. PPM alarm factory settings are as follows: Table.
PAGE 11
Step 02: Remove jumper from selected terminal. In this example, remove jumper from Controller 1 at X100. Fig. 18 Step 03: Wire terminal X63 to terminal X100 NOTE: The control sequence the EKE 400 controller will apply on receipt of this signal may be easily set up by using the CoolConfig software interface. IMPORTANT: Only the DO in the controlled evaporator circuit will be de-energized by this function. AO will not be affected and will continue to operate according to the output signal of the controller.
PAGE 12
Connecting the Gas Detector PPM reading to the Controller The Gas Detection PPM analog output signal (mA factory default) may be connected to a controller AI terminal and read on the Modbus RTU controller network. The actual AI controller terminal the AO terminal from the gas detection unit will depend on the configuration of the EKE 400 controller.
PAGE 13
Accessory: Signal conditioners The PXE 02 and PXE 04 analog output signals from its controllers to evaporator controlling actuators are 0–10 V type from the factory. It is possible purchase signal conditioners as accessories from Danfoss that can be installed and wired by the customer (please contact a Danfoss sales representative). Signal conditioners change the analog output signal at the panel terminal from 0–10 V to 4–20 mA. The following is a quick overview as to how this may be done.
PAGE 14
Accessory: Stepper motor drivers The PXE 02 and PXE 04 analog output signals from its controllers to evaporator controlling actuators are 0-10 V type from the factory. It is possible purchase Danfoss stepper motor drivers EKF 1A to drive 1 stepper motor valve and EKF 2A to drive 2 stepper motor valves as accessories that can be installed and wired by the customer.
PAGE 16
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary eady agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.