Danfoss PXE 02, PXE 04 Installation guide
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. 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)
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PXE 02: Baseplate layout
Fig. 02
BBA
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. After removing unused cable from SKINTOP MULTI - elastic gel will NOT SEAL, please use silicone to ensure proper
IP (Ingress Protection)
3. Use plug for M20 gas detector gland if gas detector is not present.
C
NB:
DIFFERENT POTENTIALS 24 V AND 230 V SHOULD BE PLACED IN SEPARATE CABLE ENTRY
PXE 02: Mounting instructions
Fig. 03
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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. 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 controllers RS485 terminal
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, heater & thermostat (side of panel)
17. Rail for wire organization
18. Baseplate (see baseplate layout diagram below)
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PXE 04: Baseplate layout
Fig. 05
BBA A
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. After removing unused cable from SKINTOP MULTI - elastic gel will NOT SEAL, please use silicone to ensure proper
IP (Ingress Protection)
3. Use plug for M20 gas detector gland if gas detector is not present.
NB:
DIFFERENT POTENTIALS 24 V AND 230 V SHOULD BE PLACED IN SEPARATE CABLE ENTRY
C
PXE 04: Mounting instructions
Fig. 06
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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. This is necessary in achieving the panel’s rated IP
• Unused cable gland openings must be closed, and all gland insert bores must be occupied to achieve the panel’s rated IP.
Gland insert bores may be plugged using the supplied sealing plugs. After removing unused cable from SKINTOP MULTI elastic gel will NOT SEAL, please use silicone to ensure proper IP. Note: non-punctured insert bores retain IP level 65/66
(depending on panel variant)
• The wiring of Modbus RTU (RS485) must be carried out in accordance with the standard ANSI/TIA/EIA-485-A-1998.
Galvanic separation shall be provided for segments crossing buildings. Common ground shall be used for all devices on
the same network inclusive router, gateways etc. All bus connections in the cables are made with twisted pair wires.
The recommended cable type for this is AWG 22/0.32 mm
•
The evaporator controllers and Gas Detector are on separate Modbus RTU networks and therefore have 2 separate panel terminals
• Connecting panels (evaporator controllers) in series via the correct terminals is shown in fig. 08
• Remember to terminate the RS485 network following the last physical device with a 120 ohm resistor, as shown in fig. 09
Fig. 07
EKE 400 Controllers GDA Gas detection unit
Panel terminal Panel terminal
Fig. 08
Fig. 09
D+
X107
GND GND
D+
X54D- D-
Available Modbus RTU parameters in each controller and gas detector
For a complete overview of all the available Modbus parameters for each evaporator controller device (there are 500+ Modbus
values available per controller) please refer to the EKE 400 controller datasheet for comprehensive descriptions and details: Link
For a complete overview of all the available Gas Detector Modbus parameters please refer to the Gas Detector Modbus
Communication Guide for comprehensive descriptions and details: Link
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