Emerson Dixell XM670K Schema elettrico

Document Part # 026-4280 Rev 1 Page 1 of 33

Visit our website at www.climate.emerson.com for the latest technical documentation and updates.

1 Introduction

1.1. General Warnings

Please read the following safety precautions and warnings before using this manual:

2 Before Proceeding

2.1. Software Release of XM670K

1. Look at the software release of XM670K printed on the label of the controller.

2. If the software release is 5.4, proceed with this manual; otherwise contact Emerson to access the correct manual.

3. Note that RTC is not supported on devices connected to E2, E3, and Site Supervisor.

CAUTION!

• This manual is part of the product and should be kept near the device for easy and quick reference.

• The device should not be used for purposes different from those described in this manual. It cannot be used as a safety device.

• Check the application limits before proceeding.

• Emerson reserves the right to change the composition of its products, even without notice, ensuring the same and unchanged functionality.

SAFETY PRECAUTIONS!

• Check that the supply voltage is correct before connecting the device.

• Do not expose to water or moisture: use the controller only within the operating limits and avoid sudden temperature changes with high

atmospheric humidity to prevent condensation from forming.

• Warning: Disconnect all electrical connections before performing any kind of maintenance.

• Fit the probe where it is not accessible by the end user. The device must not be opened.

• In case of failure or faulty operation, send the device back to the distributor or to Emerson (see address) with a detailed

description of the fault.

• Verify the maximum current that can be applied to each relay (see section 16, 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 main filters in parallel with inductive loads could be useful.

Figure 2-1 - Software Release of XM670K 5.4

Controllers for Multiplexed Cabinets

XM670K Rel. 5.4

Installing and Operating Instructions

Document Part # 026-4280 Rev 1 Page 2 of 33

Visit our website at www.climate.emerson.com for the latest technical documentation and updates.

3 General Description

The XM670K isa 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 XM670K has 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 XM670K also has 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 XM670K is equipped with 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. The HOTKEY connector can be used to connect X-REP

display (depending on the model).

3.1. Ordering Codes

4 Installation and Mounting

This device can operate without any user interface, but normal application is with CX660 or CH660 keyboard (both 660 displays

are supported).

Part Number Description

318-6521 XM670K Case Controller Solenoid, 110V, V5.4, NTC CPC, with Connectors

318-6750 Remote Display Keyboard CX660 for XMs

318-6751 Remote Display Keyboard CH660 for XMs

Table 3-1 - Product Ordering Codes

CX660 CH660

Figure 4-1 - CX660 Keyboard Installation and Mounting

The CX660 keyboard should be mounted on a vertical panel,

in a 29 x 71 mm hole, and secured using the special bracket

supplied Figure 4-1

The temperature range allowed for correct operation is 32 to

140°F (0 to 60°C). Avoid places subject to strong vibrations,

corrosive gases, excessive dirt or humidity. The same

recommendations apply to probes. Allow air to circulate

through the cooling holes.

Document Part # 026-4280 Rev 1 Page 3 of 33

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4.1. Dimensions

5 Wiring Diagram and Connections

5.1. Important Note

The XM device is provided with a disconnectable terminal block to connect cables with a cross-section of up to 1.6 mm2 for all

low voltage connections: RS485, LAN, probes, digital inputs, and keyboard. Other inputs, power supply and relay connections

are provided with a screw terminal block or Faston connection (5.0 mm). Heat-resistant cables have to be used. Before

connecting the cables, verify that the power supply complies with the controller’s requirements. Separate the probe cables from

the power supply cables, outputs and 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 loads is 16A.

The probes should 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 measure the average room temperature correctly. Place the defrost

termination probe among the evaporator fans in the coldest place (where most ice is formed) and far from heaters or from the

warmest place during defrost to prevent premature defrost termination.

5.2. XM670K- All Power Supply

Models with 115V supply: use terminals 8-7 for supply.

Figure 4-2 - CX660 and CH660 Dimensions

Figure 5-1 - Wiring and Connections

Document Part # 026-4280 Rev 1 Page 4 of 33

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5.3. Keyboard Display CX660 or CH660

5.4. LAN Connection - Maximum of 8 Connections

To create a LAN connection and to a perform synchronized defrost (also called master-slave functioning):

1. Connect a shielded cable between terminals 38 [-] and 39 [+] for a maximum of eight (8) sections.

2. The Adr parameter is the number that identifies each electronic board. Address duplication is not permitted; in this case,

synchronized defrost and the communication with the monitoring system are not guaranteed (the Adr is also the

MODBUS address). See Figure 5-3 for an example of a properly configured LAN connection:

5.5. How to Connect the Monitoring System

Figure 5-2 - Keyboard Display

Figure 5-3 - LAN Connection

NOTE: If the LAN is connected properly, the green LED will be ON. If the LAN is not connected properly, a blinking LED will display.

The maximum allowed distance is 30m.

Figure 5-4 - Connecting the Monitoring System

The XM670/679K Board can operate also without

keyboard.

Polarity:

Terminal [34] [-]

Terminal [35] [+]

Use twister shielded cable AWG 18 or less in cases where

longer distance is required.

Max distance: 30 meters

1. Connect through terminals 36 [-] and 37 [+].

2. Use a shielded twisted cable (for example, Belden 8762 or CAT 5 cable).

3. The maximum allowable distance is 1 kilometer.

4. Do not connect the shield wire to the earth or ground terminals of the

device. Use insulation tapes to avoid accidental contacts.

Document Part # 026-4280 Rev 1 Page 5 of 33

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Only one controller for each LAN should be connected to the RS485 connection.

The Adr parameter is the number that identifies each electronic board. Address duplication is not permitted; in this case,

synchronized defrost and the communication with the monitoring system are not guaranteed (the Adr is also the MODBUS

address).

5.6. Digital Inputs

The i1P can be set to: cL= active when closed; or oP= active when opened.

The i1F parameter can be set to: EAL = external alarm, Bal = serious lock alarm, PAL= pressure switch alarm, dor = door switch,

dE F= external defrost, AUS= auxiliary activation command, LiG= light activation, OnF = board On/OFF, FHU= do not use this

configuration, ES= day/night, or HdY = do not use this configuration.

The i1d parameter is for the delay of activation.

For the other digital inputs, same set of parameters is present: i2P, i2F, i2d, i3P, i3F, i3d.

5.7. Analog Output

The analog output is located near the terminal [39] on a two-pin connector. The analog output can be used to control anti-sweat

heaters using a chopped phased controller, XRPW500 (500 watt) or family, XV...D or XV...K.

Figure 5-5 - Connecting Monitoring Systems

Figure 5-6 - Digital Inputs

Figure 5-7 - Analog Output

1. Terminals [30] through [33] are all free of voltage.

2. Use a shielded cable for distances higher than one meter.

For each digital input, configure the parameters: i1P (polarity of activation), i1F (function of

the input), and i1d (delay of signaling).

• Can be set between 4 to 20mA and 0 to 10VDC.

• Use a CABCJ15 cable for connections.

Document Part # 026-4280 Rev 1 Page 6 of 33

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6 User Interface

6.1. Icons

6.2. Keyboard Commands

Single commands:

•LIGHT relay: Press the light button

•AUX relay: Press the down arrow button

•Manual defrost: Press the defrost button for three (3) seconds

•ON/OFF: Press the ON/OFF button for three (3) seconds (if the function is enabled)

•Energy Saving: Press the ON/OFF button for three (3) seconds (if the function is enabled)

Figure 6-1 - XM670K Display

Cooling Output

Light Fan The output is activated when the icon is ON. A delay

is present when the icon is blinking.

MEASUREMENT UNIT

°C, Bar, and (time) are ON depending on the

selection.

Defrost Auxiliary relay

Energy Saving Multimaster enabled

Generic alarm Clock/time

DURING PROGRAMMING: The measurement units of temperature and pressure will blink.

Table 6-1- XM670K Display Icons

Document Part # 026-4280 Rev 1 Page 7 of 33

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6.2.1. Double Commands

6.3. How to Modify the Air Temperature Regulation Setpoint

The thermostat setpoint is the value used to regulate air temperature. The regulation output is controlled by the electronic valve

or the relay.

In any case, it is possible to wait for about 10 seconds to exit. In order to show the air temperature set is sufficient to press and

release the SET button, the value is displayed for approximately 60 seconds for KEY COMBINATIONS.

7 How to Program the Parameters

(Pr1 and Pr2)

The device has two programming levels: Pr1 (direct access) and Pr2 (password-protected, access for higher level users).

+ Press for three (3) seconds to lock (Pon) or unlock (PoF) the keyboard.

Press both keys to exit the programming mode or from a menu; when on submenus EEV, pressing these keys

returns you to the previous level.

Press both keys for three (3) seconds to enter the first level of the programming mode.

Table 6-2 - Keyboard Double Commands

BEGIN Press the SET key for three (3) seconds (the measurement units will blink).

Value modification or Use the up arrow and down arrow keys to change the LS and US parameters value.

EXIT Press the SET key to save the value (the value will blink for two (2) seconds).

Table 6-3 - Modifying the Air Temperature Regulation Setpoint

ACCESS to Pr1 Press for three (3) seconds to enter the first programming level (Pr1).

Select item or Press the up arrow or down arrow key to select the parameter or submenu.

Show value Press the SET button.

Modify or Press the up arrow or down arrow key to change the value.

Confirm and

store Press SET (the value will blink for three (3) seconds and then display the next parameter).

EXIT Press to exit the programming mode, or wait for 10 seconds to exit.

Table 7-1 - Programming the Parameters (Pr1 and Pr2)

Document Part # 026-4280 Rev 1 Page 8 of 33

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7.1. How to Enter Pr2

To enter Pr2 programming menu:

1. Press SET+ down arrow keys for three (3) seconds to enter Pr1 menu (the first label will display).

2. Press down arrow until the Pr2 label displays and then press SET.

3. A blinking “PAS” label displays. Wait a few seconds.

4. When a blinking “0 - -” displays, enter the password [321] by pressing the up arrow and down arrow keys. Press SET to

save.

GENERAL STRUCTURE: The first two items, rtC and EEV, are related to the submenus of the other parameters.

• Pressing the SET + up arrow keys on the rtC or EEV submenu returns you to the parameter list.

• Pressing the SET + up arrow keys on the parameter list exits the screen.

7.2. How to Move a Parameter From Pr1 to Pr2 Level and Vice Versa

Enter the Pr2 level and select the desired parameter then press the SET+ down arrow keys. If the LED on the left-hand side of the

screen is ON, it means that the parameter is present in Pr1 level; if the LED is OFF, it means that the parameter is not present in

Pr1 (Only Pr2).

Figure 7-1 - General Structure

Document Part # 026-4280 Rev 1 Page 9 of 33

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8 Fast Access Menu

The Fast Access menu contains the list of probes and values that are automatically emptied by the board such as the superheat

and percentage of valve opening. The values: nP or noP stand for probe not present or value not emptied, and Err means the

value is out of range, the probe is damaged, not connected, or configured incorrectly.

9 Multimaster Function Menu (SEC)

The function “section” SEC is enabled when the icon is lit. It allows entering the remote programming mode from a keyboard

not physically connected to the board through the LAN functionality.

ENTERING THE FAST ACCESS

Press and release the up arrow key. The duration of the menu in

case of inactivity is about 3 minutes. Depending on the

configuration of the board, the values display.

To select an entry, press the

or , then press to view

the value or to move to the next

value.

MAP Current map (0 to 3): it shows which map is used

HM Access to clock menu or reset the RTC alarm

An Value of analog output

dP1 (Pb1) Value read by probe 1

dP2 (Pb2) Value read by probe 2

dP3 (Pb3) Value read by probe 3

dp4 (Pb4) Value read by probe 4

rCP Value of P4 remote probe for heaters. It is displayed only with P4C = LAn.

If the value is not available “noP” label is displayed.

dPr Virtual probe for room temperature regulation [rPA and rPb]

rSE Real thermoregulation setpoint: the value includes the sum of SET,

HES and/or the dynamic setpoint if the functions are enabled.

L°t Minimum room temperature

H°t Maximum room temperature

tMd Time to next defrost (minutes)

LSn Number of devices in the LAN

LAn Address list of devices in the LAN

GAL To see all the active alarms in each device connected to the LAN

EXIT Press together or wait the time out for 60 seconds.

Table 8-1 - Fast Access Menu

Figure 9-1 - LAN Connection

Document Part # 026-4280 Rev 1 Page 10 of 33

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(*) The devices on the LAN are indexed by using the Adr parameter (in ascending order).

EXAMPLES:

1. To modify the same parameter values in all the devices connected to the LAN: enter the multi-master menu. Select and

confirm ALL. Exit from the multi-master menu. Enter the programming menu and change the required parameter values.

The new values will be changed on all devices connected to the LAN.

9.1. Synchronized Defrost

The synchronized defrost allows multiple defrosts to be managed from different boards connected through the LAN connection.

In this way, the boards can perform simultaneous defrosts with the possibility to end them in a synchronized manner.

Action Button or display Notes

Enter menu Press the up arrow key for about three (3) seconds; the icon will be ON.

Waiting for action SEC The menu to change the section will be entered. SEC label will be displayed.

Enter section list Press SET to confirm. The following list will be available to select the proper

network function.

Select proper function or LOC

GLb

To gain access only to the local device.

To share global command to all the devices connected to the LAN.

Confirm Select and confirm an entry by pressing SET button.

Exit menu Press SET and the up arrow together or wait aproximately 10 seconds.

Table 9-1 - Multimaster Function Menu Action Buttons

CAUTION: At the end of programming, select the LOC section to switch OFF the icon.

CAUTION: In this case, the Adr parameter cannot be duplicated because defrost cannot be managed correctly.

BEGIN Press for three (3) seconds, the rtC or other will be showed. The measurement unit

blinks.

Find Adr Press the down arrow key several times to find the Adr parameter, then press SET.

Modify Adr or Set the value of Adr parameter, then press SET to confirm the parameter.

EXIT Press both keys to exit from menu or wait for about 10 seconds.

Table 9-2 - Synchronized Defrost Keys

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