Thank you for your choice. We trust you will be satisfied with your purchase.
Introduction
µRack is an electronic controller for the complete management of compressor racks with up to 4 compressors.
Characteristics of the connectors
The connectors can be purchased separately from CAREL Contact code and cross-section of the connection
(MCH2CON0**) or from the manufacturer, Molex
:
cables to the 12- and 14-pin connectors (for crimping,
use the special Molex tool‚ 69008-0724):
Molex connector code
number of pins
Molex contact code Cross-section of the cables allowed
39-01-2120
12
39-00-0077
AWG16 (1.308 mm
2
)
39-01-2140
14
39-00-0038
AWG18-24 (0.823 to 0.205 mm
2
)
39-00-0046
AWG22-28 (0.324 to 0.081 mm
2
)
Maximum number of connections/disconnections: 25 cycles. The pre-wired kits MCHSMLC*** are also available.
Assembly instructions
Maximum connection cable length, NTC/Ratiometric probes:
10 m
Maximum connection cable length, digital inputs:
10 m
Maximum connection cable length, power outputs:
5 m
Maximum connection cable length, fan control output:
5 m
Maximum length, power cables:
3 m
The use of some inputs/outputs depends on the configuration of the parameters.
Configuration example (unit with 2 compr 2 condenser fans)
Connector
Connection
Meaning
14 pin
G-G0
µRack power supply
B1-GND
Discharge pressure/temperature probe
B2-GND
Room temperature probe
B3-GND
Outside temperature probe
B4-GND
Suction pressure probe
ID1-GND
Compressor 1 thermal overload input
ID2-GND
Compressor 2 thermal overload input
ID3-GND
Fan 1 thermal overload input
ID4-GND
Fan 2 thermal overload input
ID5-GND
Multifunction input configured by parameter (see user manual)
Y-GND
PWM output for modulating condenser fan operation
12 pin
No1-C1/2
Compressor 1
No2-C1/2
Compressor 2
No3-C3/4
Fan 1
No4-C3/4
Fan 2
No5-C5
Alarm
3 pin
GND-B4-V+
V+ power supply to ratiometric probe
Parameter programming key option
Panel version: with the controller OFF, insert the key PSOPZKEY00 in the connector KEY/SPV. Connect and
disconnect the serial and programming key options with the 12-pin connector (relay) removed.
DIN rail version: with the controller off, remove the bottom cover and insert the key PSOPZKEY00 in the special connector.
Supervisor option
Panel version: connect the serial option (code MCH200485*) to the connector KEY/SPV.
Note: the configuration jumper must be inserted in position A (technical leaflet MCH200485*)
DIN rail version: remove the bottom cover and insert the supervisor card FCSER00000 in the special connector.
Connect the 485 shielded cable (2 wires + shield) to terminals GND, T+, T-.
Warnings
If using a single power transformer for the µRack and the accessories, connect all the G0 terminals on the various
controllers or boards to the same terminal on the secondary, and all the G terminals to the other terminal on the
secondary, to avoid damaging the instrument.
Avoid short-circuits between V+ and GND so as to not damage the instrument.
•
Separate the power cables (relay outputs) from the probe, digital input and serial cables.
•
Use the power transformer exclusively dedicated to the electronic controllers.
•
Protection against electric shock and warnings for maintenance
Disconnect the power supply before working on the board during the assembly, maintenance and replacement operations.
The system made up of the control board (MCH200000*) and the other optional cards (MCH200002*,
MCH200485*, MCHRTF****, CONVONOFF*, CONV0/10A*, EVD000040*) represents a control device to be incorpo-
rated in class I or class II equipment. The class of protection against electric shock depends on how the control
device is integrated into the unit made by the manufacturer. The protection against short-circuits, due to defecti-
ve wiring, must be guaranteed by the manufacturer of the equipment that the control device is built into.
User interface
Green 3 digit display (plus sign and decimal point), amber operating signals and red alarm signal.
Symbol Colour
Meaning
LED on
LED flashing
1,2,3,4 Amber Compressor 1,2,3,4 on
Awaiting start, delayed by timers
Amber At least one compressor on
Together with the ALARM LED identifies an alarm on the compressors
Amber At least one condenser fan one
Together with the ALARM LED identifies an alarm on the fans
Amber Discharge pressure display activated Together with the ALARM LED identifies a discharge alarm HP
Amber Suction pressure display activated
Together with the ALARM LED identifies a suction alarm HL
Red
Active alarm
Amber Display in bar
Red
Display in degrees Celsius
感谢您选择
CAREL
，我们相信您会对您的选择感到满意。
简介
µRack
是一款电子控制器，用于带最多
4
台压缩机的压缩机组的全面管理。
连接器的特点
连接器可以单独从
CAREL
订购
(MCH2CON0**)
接触器代码以及到
12 pin
和
14pin
连接器的连接线
或从生产商
Molex
订购：
的截面（如要对连接线做弯边，请使用特殊的
Molex
工具，
69008-0724
）：
Molex
连接器代码
pin
数
Molex
连接器代码
允许的线缆截面
39-01-2120
12
39-00-0077
AWG16 (1,308 mm
2
)
39-01-2140
14
39-00-0038
AWG18-24 (0,823...0,205 mm
2
)
39-00-0046
AWG22-28 (0,324...0,081 mm
2
)
连接/断开连接的最多次数：
25
次。还可订购预制线缆组件
MCHSMLC***
。
MCHSMLC***.
装配说明：
NTC/
公制比例式传感器，最长连接线：
10 m
数字输入，最长连接线：
10 m
电源输出，最长连接线：
5 m
风机控制输出，最长连接线：
5 m
电源线，最长连接线：
3 m
部分输入/输出点的使用取决于参数的设置。
设置示例（带
2
台压缩机
+2
台冷凝风机的机组）
连接器
连接端
含义
14 pin
G-G0
µRack
电源
B1-GND
排气压力/温度传感器
B2-GND
房间温度传感器
B3-GND
外部温度传感器
B4-GND
吸气压力传感器
ID1-GND
压缩机
1
：热过载输入
ID2-GND
压缩机
2
：热过载输入
ID3-GND
风机
1
：热过载输入
ID4-GND
风机
2
：热过载输入
ID5-GND
由参数设置的多功能输入（参考用户手册）
Y-GND
PWM
输出，用于调节冷凝风机运行
12 pin
No1-C1/2
压缩机
1
No2-C1/2
压缩机
2
No3-C3/4
风机
1
No4-C3/4
风机
2
No5-C5
报警
3 pin
GND-B4-V+
到公制比例式传感器的
V+
电源
参数编辑钥匙选配卡
面板安装型：当控制器关闭时，将编辑钥匙
PSOPZKEY00
插入到连接端
KEY/SPV
。连接和断开通讯以及编
辑钥匙选配卡，将
12-pin
连接器（继电器）拆下。
DIN
导轨型：当控制器关闭时，拆下底板，将编辑钥匙
PSOPZKEY00
插入到专用的连接端。
监控器选配卡
面板安装型：连接通讯卡（代码为
MCH200485*
）到连接端
KEY/SPV
。
DIN
导轨型：拆下底板，将监控卡
FCSER00000
插入到专用的连接端。
连接
485
屏蔽线缆（
2
芯屏蔽线）到端口
GND, T+, T-
。
特别提示
如果
•
μRack
和附件使用一个独立的电源变压器，连接多个控制器或控制板的所有
G0
端到次级变压
器的同一端，并且所有
G
端到次级变压器的其它端，以避免损坏装置。
避免
•
V+
和
GND
之间短路，从而避免损坏装置。
将电源线（继电器输出）与传感器、数字输入和通讯线分开。
•
电源变压器完全专用于电子控制器。
•
防电击保护和维护说明
装配、维护和更换操作时，在主板工作之前请断开电源。
由控制板
(MCH200000*)
和其它选配卡
(MCH200002*, MCH200485*,
MCHRTF****, CONVONOFF*, CONV0/10A*, EVD000040*)
组成的系统代表了归入
I
类或
II
类装置的一种控制设
备。防电击保护的等级取决于控制设备是如何被集成到由制造商生产的机组中。由于配线有问题的防
短路保护，必须由控制设备所嵌入的装置制造商来保证。
用户界面
绿色
3
位数字显示（加上图标和小数点），黄色运行信号和红色报警信号。
图标
颜色
含义
LED
灯亮
LED
灯闪烁
1,2,3,4
黄色
压缩机
1,2,3,4
开
等待启动，因定时器控制而延迟
黄色
至少一台压缩机开
与报警
LED
灯一起闪烁，表示压缩机有报警
黄色
至少一台冷凝风机开
与报警
LED
灯一起闪烁，表示风机有报警
黄色
排气压力显示被启用
与报警
LED
灯一起闪烁，表示排气报警
HP
黄色
吸气压力显示被启用
与报警
LED
灯一起闪烁，表示吸气报警
HL
红色
报警动作
黄色
以单位
Bar
显示
红色
以单位摄氏度显示
cod. +05P002873 - rel.1.1 - 06/03/2009
MRK0000*: µRack
用于最多带四台压缩机的压缩机组全面管理的电子控制器
/
Electronic controller for the complete management of compressor racks with up to 4 compressors
G0 B1 B2 B3 ID5 ID3 ID1
G GND GND Y GND ID4 ID2
No1 C1/2 C1/2 C3/4 x C5
N02 No3 No4 C3/4 x No5
ext
. temp
. p
robe/
外部温度传感器
amb
. temp
. p
robe/
环境温度传感器
alarm 4
alarm 2
alarm 1
alarm 3
mu
ltif
un
cti
on
D
.I./alarm
多功能数字输入/报警
Line
L
N
To program key
到程序转载器
To serial link
到串行连接
RS485
option
选配卡
Tx/Rx GND
GND B4 V+
P
discharge
pressure
probe
排气压力
传感器
suction
pressure
probe
吸气压力
传感器
Key/SPV
Line
L
N
P
24 V
TRADR1W04
PSOPZKEY*
MCH2004850
/选配卡
PWM/
数字转换器
PWM/
模拟量转换器
风机调速器
压力传感器
RS485
通讯卡
程序转载器
电气连接（面板安装型）
/
Electrical connections (panel version)
Fig. 1
Fig. 2
用户界面
/
User interface
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
友情提示：请将传感器和开关量输入信号线与带电感负荷的线缆和电源线尽可能分
开，以避免可能产生的电磁干扰。
不要将电源线（包括电控板接线）和信号线放在同一个导管内。
WARNING: separate as much as possible the probe and digital input signal cables from the cables
carrying inductive loads and power cables to avoid possible electromagnetic disturbance. Never
run power cables (including the electrical panel wiring) and signal cables in the same conduits.
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
