Code Alarm SRT 6700 Service Manual download pdf (Page 7)

General Warning Introduction • 1

1 Introduction

1.1. General Warning

Please read the following safety precautions and

warnings before using this manual:

2Overview

2.1. General Description

Models XM670K-XM679K are high level micro-

processor based controllers for multiplexed cabinets,

suitable for applications on medium or low tempera-

ture. It can be inserted in a Local Area Connection

(LAN) of up to eight (8) different sections that can op-

erate depending on the programming, as stand alone

controllers or by following the commands coming

from the other sections.

XM670K/XM679K controllers can have six (6)

relay outputs to control the solenoid valve, defrost

that can be either electrical or hot gas, evaporator

fans, lights, auxiliary output, alarm output and an out-

put to drive pulsed electronic expansion valves (appli-

cable for XM679K only).

The controllers can also have up to four (4) probe

inputs: the first one for temperature control, the sec-

ond for defrost end temperature control of the evapo-

rator, the third for the display, and the fourth probe

input can be used for applications with virtual probe

or for inlet/outlet air temperature measurement. Mod-

el XM679K can exclusively have two (2) other probes

that can be used for superheat measurement and regu-

lation. Both XM670K and XM679K controllers are

also equipped with three digital inputs (free contact)

that are fully configurable through parameters.

The Hot Key connector allows simple program-

ming of the controllers. Direct serial output RS485

MODBUS-RTU compatible permits a simple XWEB

interfacing. Real Time Clocks (RTC) are available as

options. Depending on the model, the Hot Key con-

nector can also be used to connect X-REP display.

2.2. Ordering Code

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 differ-

ent from those described in this manual. It cannot be

used as a safety device.

• Check the application limits before proceeding.

SAFETY PRECAUTIONS AND

WARNINGS!

• Check that the supply voltage is correct

before connecting the device.

• Do not expose to water or moisture: use the con-

troller only within the operating limits and avoid sud-

den 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 Retail

Solutions (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 environ-

ments, the use of main filters (our mod. FT1) in paral-

lel with inductive loads could be useful.

Device

Name

Dixell Code

Emerson

Code

XM670K-

XM679K

X0MGIIIMD5NA-000 318-6700

Table 2-1 - Product Ordering Code

1 2 3 4 5 6 7 8 9 10 11 12 ... 53 54

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