Rittal Blue e+ - Install the Power Supply; Connect the Alarm Relays; Interfaces

Rittal roof-mounted Blue e+ cooling unit/VX25 Blue e+ integration solution 27
5 Installation
EN
Fig. 15: Potential equalisation arrangement
Key
1 Ring terminal with PE conductor
2 Contact washer
3Washer
4 Screw
5.4.2 Install the power supply
 Remove the mains connector from the dispatch bag
and connect to the mains as shown on the connection
diagram (fig. 16 or fig. 17).
Fig. 16: Circuit diagram 3185030
Fig. 17: Circuit diagram 3185730
Key
X1 Main terminal strip
K1 Relay collective fault 1
K2 Relay collective fault 2
Door Door limit switch (optional for 3185730, without door lim-
it switch: terminal 5, 6 open)
NTC External temperature sensor (optional)
X3 RS 485 interface for IoT Interface (3124.300)
Create a strain relief
 For the roof-mounted cooling unit, take the T-rail from
the dispatch bag and attach it to the connection unit.
The T-rail is already pre-installed for the integration
solution.
 Then establish the strain relief on the T-rail using cable
ties.
5.4.3 Connect the alarm relays
System messages from the cooling unit may be output
to an external signal source via two floating relay out-
puts.
 Connect a suitable connection cable to the connec-
tion terminals 1 (Alarm K1) and/or 3 (Alarm K2) of the
signal connector (X2).
 Configure the alarm relays you wish to use to output
error messages (see section 7.4.3 "Alarm relays").
5.4.4 Interfaces
The cooling unit has the following interfaces for commu-
nicating with external systems:
– Micro-USB interface on the front
– RS 485 interface at the bottom
Note:
According to the standard, the PE conductor
in the mains connection cable is not classed
as an equipotential bonding conductor.
Note:
The enclosure of the integration solution or
the enclosure on which the cooling unit is
mounted must be grounded.
Note:
– The mains supply must be shielded with
EMC preferred type to achieve the values
demanded by the standard.
– The cable shield can make contact with the
T-rail (fig. 13, item 1).
Note:
The factory setting of the relay outputs in their
de-energised state is NO (Normally Open).
AC
cos φ = 1
I max. = 2 A
U max. = 250 V
Tab. 5: Contact data