1592023220 XM660K_XM670K GB r5.4 2021.09.01
XM660K - XM670K
1/9
CONTROLLERS FOR MULTIPLEXED CABINETS
XM660K- XM670K
-MANUAL FOR THE SW REL. 5. 4d -
1.
GENERAL WARNING
1.1
PLEASE READ BEFORE USING THIS MANUAL
•
This manual is part of the product and should be kept near the instrument for easy and quick
reference.
•
The instrument shall not be used for purposes different from those described hereunder. It cannot
be used as a safety device.
•
Check the application limits before proceeding.
•
Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring
the same and unchanged functionality.
1.2
SAFETY PRECAUTIONS
•
Check the supply voltage is correct before connecting the instrument.
•
Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of condensation
•
Warning: disconnect all electrical connections before any kind of maintenance.
•
Fit the probe where it is not accessible by the End User. The instrument must not be opened.
•
In case of failure or faulty operation send the instrument back to the distributor or to “Dixell
S.r.l.
”
(see address) with a detailed description of the fault.
•
Consider the maximum current which can be applied to each relay (see Technical Data).
•
Ensure that the wires for probes, loads and the power supply are separated and far enough from
each other, without crossing or intertwining.
•
In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel
with inductive loads could be useful.
2.
BEFORE PROCEEDING
2.1
CHECK THE SW REL. OF THE XM660K, XM670K
1.
Look at the SW rel. printed on the label of the controller.
2.
If the SW release is 5.4 proceed with this manual otherwise contact Dixell to get the right manual.
3.
GENERAL DESCRIPTION
The
XM660K
/
XM670K/
are high level microprocessor based controllers for multiplexed cabinets suitable
for applications on medium or low temperature. It can be inserted in a LAN of up to 8 different sections
which can operate, depending on the programming, as stand alone controllers or following the commands
coming from the other sections. The
XM660K/XM670K
are provided with respectively 4 and 6 relay
outputs to control the solenoid valve, defrost - which can be either electrical or hot gas - the evaporator
fans, the lights, an auxiliary output (XM670K) and an alarm output (XM670K). The devices are also
provided with four probe inputs, one for temperature control, one to control the defrost end temperature
of the evaporator, the third for the display and the fourth can be used for application with virtual probe or
for inlet/outlet air temperature measurement. Finally, the
XM660K/XM670K
are equipped with the three
digital inputs (free contact) fully configurable by parameters.
The instruments are equipped with the HOTKEY connector that permits to be programmed in a simple
way. Direct serial output
RS485
ModBUS-RTU
compatible permits a simple XWEB interfacing.
RTC
are
available as options. The HOTKEY connector can be used to connect
X-REP
display (Depending on the
model).
4.
INSTALLATION AND MOUNTING
This device can operate without any user interface, but normal application is with Dixell CX660 or CH660
keyboard.
CX660
CH660
Fig. A
The
CX660 or CH660 keyboard
shall be mounted on
vertical panel, in a 29x71 mm hole, and fixed using the
special bracket supplied as shown in Fig. A.
The temperature range allowed for correct operation is 0
to 60°C. Avoid places subject to strong vibrations,
corrosive gases, excessive dirt or humidity.
The same recommendations apply to probes. Let air
circulate by the cooling holes.
4.1
DIMENSIONS
CX660
CH660
5.
WIRING DIAGRAM AND CONNECTIONS
5.1
IMPORTANT NOTE
XM
device is provided with disconnectable terminal block to connect cables with a cross section up to 1.6
mm
2
for all the low voltage connection: the RS485, the LAN, the probes, the digital inputs and the
keyboard. Other inputs, power supply and relay connections are provided with screw terminal block or
fast-on connection (5.0 mm). Heat-resistant cables have to be used.
Before connecting cables make sure the power supply complies with the instrument’s requirements.
Separate the probe cables from the power supply cables, from the outputs and the power connections.
Do not exceed the maximum current allowed on each relay, in case of heavier loads use a suitable external
relay.
N.B.
Maximum current allowed for all the loads is 16A. The probes shall be mounted with the bulb
upwards to prevent damages due to casual liquid infiltration. It is recommended to place the thermostat
probe away from air streams to correctly measure the average room temperature. Place the defrost
termination probe among the evaporator fins in the coldest place, where most ice is formed, far from
heaters or from the warmest place during defrost, to prevent premature defrost termination.
5.2
XM660K
–
ALL POWER SUPPLY
Models with 115V
supply: use terminals 8-7 for supply
5.3
XM670K
–
ALL POWER SUPPLY
Models with 115V
supply: use terminals 8-7 for supply
5.4
KEYBOARD DISPLAY CX660 OR CH660
T
he
XM670/679K
board can operate also without keyboard.
Polarity:
Terminal [
34
] [-]
Terminal [
35
] [+]
Use twisted shielded cable
AWG 18 or less in case of
long distance.
Max distance:
30m
5.5
LAN CONNECTION - MAXIMUM 8 SECTIONS
Follow next steps to create a LAN connection, which is a necessary condition to perform synchronized
defrost (also called master-slave functioning):
1) connect a shielded cable between terminals [
38
] [-] and [
39
] [+] for a
maximum of 8 sections
;
2) the
Adr
parameter is the number to identify each electronic board.
Address duplication is not
permitted
, in this case the synchronized defrost and the communication with monitoring system is
not guaranteed (the
Adr
is also the ModBUS address). For example, a correct configuration is the
following:
If the LAN is well connected, the green LED will be ON. If the green LED blinks then the
connection is wrongly configured.
The max distance allowed is 30m
5.6
HOW TO CONNECT MONITORING SYSTEM
1)
Terminals [
36
] [-] and [
37
] [+].
2)
Use shielded twisted cable. For example
Belden® 8762 o 8772 or cat 5 cables.
3)
Maximum distance 1Km.
4)
Don’t connect the shield to the earth or to GND
terminals of the device, avoid accidental contacts
by using insulating tape.
