Emerson EXD-U01 User Manual

Operating Instructions
Universal Driver Module EXD-U01
for Electrical Control Valves
EX4 … EX8 / CX4 … CX7
Emerson Climate Technologies GmbH www.emersonclimate.eu
Am Borsigturm 31 I 13507 Berlin I Germany Date: 07.12.2015 EXD-U01_OI_ML_R02_865910.docx
General information:
EXD-U01 Universal Driver Module is for driving Emerson stepper motor driven
electrical control valves series EX4…EX8 / CX4…CX7.
Safety instructions:
• Read operating instructions thoroughly. Failure to comply can result in
device failure, system damage or personal injury
• According to EN 13313 it is intended for use by persons having the
appropriate knowledge and skill.
• Before wiring disconnect all voltages from system and device.
• Do not operate system before all cable connections are completed.
• Do not apply 110/220/230V to any terminal of driver module
• Entire electrical connections have to comply with local regulations.
Installation and wiring
• Install electrical control valve in system according to operating instructions of
valve.
• Install Driver Module and other external electronic devices as shown in wiring
diagram (see Fig. 2).
• Keep separate the wires for power supply, stepper motor of valve and signal.
• Recommended wire size Ø 0.5 … 2.5 mm
2
.
Setting (Fig.1):
• Disconnect voltage
• Set dip switches as per table below
Dip Switch Number
Valve / Analog Input
1
2
3
4
5
6
7
8
EX4-6
OFF
ON
ON
OFF
ON
OFF
ON
-
CX4-6
OFF
ON
ON
OFF
ON
OFF
OFF
-
EX7
ON
OFF
OFF
ON
OFF
ON
ON
-
CX7
ON
OFF
OFF
ON
OFF
ON
OFF
-
EX8
ON
ON
OFF
ON
ON
ON
ON
-
4-20 mA
-
-
-
-
-
-
-
OFF
0-10V
-
-
-
-
-
-
-
ON
Startup procedure:
• The valve must be closed before system charging in case of expansion valve or
hot gas bypass function. The valves are delivered at half open position.
Valve closure:
• Remove 24 V from digital input.
• Apply supply voltage to driver for the minimum time in below table: (valve
motor makes a characteristic sound until it reaches the closed position)
Valve
Minimum closing time [s]
EX4-6/CX4-6
2…30
EX7/CX7/EX8
6…30
• After closure of valve evacuate the entire system.
• Then charge the system with refrigerant.
• Turn on digital input (24V)
• Start the system and check operating conditions.
Valve Synchronization:
• After power up EXD-U01 synchronizes the stepper motor driven valve with the
reference point in the fully closed position.
Technical data, power supply:
• Main supply voltage: 24 VAC ±10%, 50-60 Hz (use 1.0 A external fuse).
Note: 24 VDC supply voltage can be used but it results to lower MOPD and it
needs to be verified by system manufacture.
• Use a safety class II transformer.
Minimum power required 20 VA.
• Emergency supply voltage Ub (from ECP-024): +18 VDC.
Inputs:
• 1 analog input 4…20 mA, burden 364 Ω, or
1 analog input 0…10 V, impedance 27 kΩ.
1 digital input: 24 VAC/DC (+10%, -15%), 50-60 Hz.
Outputs:
• 4 current outputs for stepper motor of EX4…EX8/ CX4…CX7.
Uninterruptible power supply ECP-024
• Power supply voltage: 24 VAC ± 10%
• Power outputs: two, each +18 VDC
Wiring Diagram (see Fig. 2)
(1) = Supply voltage
(2) = Transformer
(3) = Fuse 1.0 A
(5) = Plug cable assembly EXV-Mxx for connection to EX4…EX8 / CX4…CX7
Cable color code
WH = White BK = Black
BL = Blue BN = Brown
(6) = Controller supplies 4…20 mA or 0…10 V
(7) = Digital input signal (0 V = OFF; 24 V = ON)
(8) = Analog input signal (4…20 mA or 0…10 V)
(9) = Optional Uninterruptible Power Supply insures the closure of valve during
power failures in systems, where a valve with positive shut-off function is
needed
• Marking: ,
!
Библиотека СОК 

Emerson EXD-U01 Specifications

General

Model	EXD-U01
Communication Protocol	Modbus RTU
Enclosure Rating	IP20
Power Supply	24V DC
Operating Temperature	-40°C to 60°C
Valve Compatibility	Compatible with various Emerson valves

Summary

General Information

Safety Instructions

Installation and Wiring

Setting the Driver Module

Startup and Valve Operation

Valve Synchronization

Ensures stepper motor valve aligns to reference point in fully closed position after power up.

Startup Procedure

Steps for initial valve operation, including evacuation and charging.

Valve Closure Procedure

Steps to close the valve using digital input and supply voltage.

Technical Specifications

Power Supply Details

Specifies main supply voltage, external fuse, and transformer requirements.

Input Signals

Defines analog inputs (4-20 mA, 0-10V) and digital input signal specifications.

Output Signals

Details the 4 current outputs for stepper motor connection.

Uninterruptible Power Supply

Wiring Diagram Reference