Signal Cables; Step 3, Control Unit Setup; Basic Setup - Danfoss VACON NX Commissioning And Maintenance Manual

2 8 VACON
Connect the power supply to the motor protection relay (marked green in
Figure 5.2-3) in the HX-unit electrical box.

5.2.2 Signal cables

A signal cable must be connected between the main drive and the HX-unit
electrical box. It should be connected from the main drive basic I/O board
NXOPTA1, terminal number 6 or 12 (24V out) to the HX-unit X1 terminal
block (marked green in Figure 5.2-4) terminal number 13 (cooling OK in),
and back from X1, terminal number 14 (cooling OK out) to the main drive,
terminal number 14 (DI 4). For more information refer to the project
specific electrical diagram and to the VACON
A 24V auxiliary voltage from the main drive is sent through the cable to the HX-unit. If the HX-unit is
working within the preset parameters then the signal is rerouted back to the main drive. When the
signal is active in the main drive basic I/O board NXOPTA1 (terminal number 14), then the main drive
When a flow fault or high temperature fault is active in the HX-
contact in the HX control unit will disconnect the 24V signal and the main drives will shut down. The
main drive cannot be brought online before the flow fault or high temperature fault is removed.
5.3

STEP 3, CONTROL UNIT SETUP

5.3.1 Basic setup

project. Primary circuit inlet temperature and primary circuit flow are two equally important
quantities that have to be monitored at all times. How to calculate the optimum flow is found in
chapter 5.4.2, Adjusting the system flow and setting the switch point of the
set up temperature alarms and shutoffs is found in chapter
WARNING
Information on how to operate the NXP control panel is found in the VACON
The control unit also includes a Fieldbus uplink card (Profibus). The customer can use this uplink to
get any of the VACON
uplink the customer can monitor the HX-unit from an external interface at a chosen location. More
5
If the customer and/or end-user cause a malfunction in the HX-unit or the main
drive by neglecting the parameter setup instructions in this manual, the
warranty is no longer valid.
®
Local contacts: http:/ / dr ives.danfoss.com/ danfoss- dr ives/ local - contacts/
Figure 5.2-3
®
NX Liquid Cooled drive
drives.
Figure 5.2-4
5.3.6, Temperature set
-unit.
COMMI SSI ONI NG
FTSA11. How to correctly
points.
®
NX Liquid Cooled