Emerson EXD-SH1 Operating Instructions Manual

EXD-SH1/2 Controller with ModBus communication
G e n e r a l i n f o r m a t i o n :
EXD-SH1/2 are stand-alone superheat and or temperature controllers. EXD-SH1 is
intended for operation of one bipolar electrical control valve whereas EXD-SH2 is
designed for operation of two independent bipolar electrical control valves.
A table of the available application possibilities is listed below:
Controller Circuit 1: Main function
EXD-SH1 Superheat or temperature control
EXD-SH2 Superheat or temperature control
Notes:
It is possible to use only circuit 1 from EXD-SH2. In this case, the circuit 2 must
be disabled (C2 parameter) and the sensors and the valve for the second circuit
are not needed.
ModBus communication is described in a Technical Bulletin and it is not
covered by this document.
T e c h n i c a l d a t a :
Power supply 24VAC/DC +10%/-10% 50/60HZ,
Power consumption EXD-SH1: 25VA
Plug-in connector Removable screw terminals wire size 0.14...1.5 mm
Protection class IP00
ECN-N... / TP1... (temperature range down to -45°C)
Temperature sensors ECN-Z... (temperature range down to -80°C ultra low
temperature)
Allowable
operating/surrounding 0...+55°C
temperature
Maximum cable distance
50 cm
between EXD-SH and
AWG 18 wire size (≥ 1mm
EXD-PM
Pressure sensors PT5N, PT5N-FLR or ratiometric probes
Output alarm relay current Resistive Load 24 V AC/DC, 1 A
rating Inductive Load 24 V AC/DC, 0.5 A
Contact is closed: During alarm condition
Contact is open: During normal operation and supply power OFF
Valves:
Stepper motor output
Mounting For standard DIN rail
Marking
Warning:
EXD-SH1/2 (EXD-PM, ECP-024) has a potential ignition source and does not
comply with ATEX requirements. Installation only in non-explosive
environment. For flammable refrigerants only use valves and accessories
approved for it!
D i m e n s i o n s ( m m ) :
S a f e t y i n s t r u c t i o n s :
• Read operating instructions thoroughly. Failure to comply can result in device
failure, system damage or personal injury.
• It is intended for use by persons having the appropriate knowledge and skill.
• Before installation or service disconnect all voltages from system and device.
• Do not operate system before all cable connections are completed.
• Do not apply voltage to the controller before completion of wiring.
• Entire electrical connections have to comply with local regulations.
• Inputs are not isolated, potential free contacts needed to be used.
.
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Operating instructions
capability for electrical control valves
Circuit 2: Main function
Superheat Control
EXD-SH2: 50VA
2 )
EX4-8 (EX4-7-FLR)
CV4-7
,
www.climate.emerson.com/en-gb
• Disposal: Electrical and electronic waste must NOT be disposed of with other
commercial waste. Instead, it is the user responsibility to pass it to a
designated collection point for the safe recycling of Waste Electrical and
Electronic Equipment
information, contact your local environmental recycling center.
T e m p e r a t u r e s e t t i n g i n n o r m a l s e n s e
(Controller function as temperature controller)
Valve opening
100%
2
0%
1tAL
T e m p e r a t u r e s e t t i n g i n r e v e r s e s e n s e
(Controller function as temperature controller)
Valve opening
100%
0%
1tAL
E l e c t r i c a l c o n n e c t i o n a n d w i r i n g :
• Refer to the electrical wiring diagram for electrical connections.
• Note: Keep controller and sensor wiring well separated from supply power
cables. Minimum recommended distance 30 mm.
• When connecting the wires of the EXV-M... (electrical plug of valves)
consider the color coding as follows:
EXV-M...: WH: White;
• The digital input DI1 (EXD-SH1/SH2) and DI2 (EXD-SH2) are the interfaces
between EXD-SH1/2 and upper level system controller if the Modbus
communication has not been used. The external digital inputs must be free of
potential (dry contact) and shall be operated in function system's
compressor/demand.
Operating condition
Compressor starts/run
Compressor stops
Note: Connecting any EXD-SH1/2 inputs to the supply voltage will permanently
damage the EXD-SH1/2
EXD-SH12_OI_EN_DE_FR_IT_PL_RU_0720_R04_865917.docx
(WEEE directive 2012/19/EU). For further
%
1tbd
1tst
%
1tbd
1tst/
BK: Black; BN: Brown; BL: Blue
Digital input status
External contact to be closed (Start)
External contact to be open (Stop)
Temperature
1tAH
Temperature
1tAH
Date: 29.07.2020