Danfoss EIM 365 User manual

User Guide
Superheat controller
Type EIM 365 (PV01)
For commercial air conditioning and refrigeration applications

Contents
Introduction 3
Portfolio overview 4
Installation 5
Applications 10
User Interface 11
Conguration 12
Alarms 21
Parameter list 23
Ordering 28
Certicates, declarations, and approvals 29
Online support 30
Superheat controller, type EIM 365 (PV01)
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 2

Introduction
EIM 365 is a superheat controller that can be used to control the superheat of the evaporator by adjusting the
opening degree of a valve. It is used in applications such as air conditioning, heat pumps and refrigeration. The
controller can also be used as stepper valve driver by setting the valve opening degree manually via communication
Bus.
Benets:
The evaporator is charged optimally for various load and suction pressure variations.Increase Energy Eciency by
ensuring optimum utilization of the Evaporator.It controls EEV in microsteps providing a smooth superheat curve
and less noise.
Features:
• Superheat regulation
• Maximum Operating Pressure function (MOP)
• Defrost
• Compressor protection functions
• Manual control via Modbus Communication
• Loss of Charge indication (LOC).
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Superheat controller, type EIM 365 (PV01)

Portfolio overview
Table 1: Portfolio overview
Features
Specications
Supply voltage
24 V AC / DC (+ 15%), 50 / 60 Hz, 15 VA / 8 W, Class II isolation
Power Consumption
Idle: Max. 20 mA @ 24 V DC
Operating: Max. 900 mA RMS @ 24 V DC
Backup battery
Yes (EKE 2U recommended)
Number of temperature sensors
2
Temperature sensor inputs
• S2: PT1000
• S4: PT1000 or Digital input from external contact
Number of Pressure sensor
1
Pressure Transmitter types
Ratiometric 0.5 – 4.5 V
Sensor Signal Sharing via ModBus
No
Valve Support
ETS 12.5, 25, 50, 100, 250, 400; ETS 6, CCMT 16-42; CTR; ETS Colibri 12-100C and User dened
Superheat Reference Mode
• MSS
• LoadAp
Startup mode
• Fixed OD
• P-Control
Operation
• Standalone
• Modbus RS485 (not terminated internally)
User interface
Modbus to supervisor, Modbus to PC
PC suite
Koolprog
Gateway to PC suite
ICPCON RS485 to usb convertor
Display
None
Table 2: Related products
Pressure transducer
Temperature sensor
Electric Expansion valve
M12 Angle Cables
AKS 32R
AKS 21, AKS 11
ETS 6, ETS 12.5-400, ETS Colibri
Various lengths of standard M12 cable
are available for connecting stepper
motor valves.
Superheat controller, type EIM 365 (PV01)
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Installation
Technical specication
Table 3: Technical specication
Features
Description
Supply voltage
24 V AC / DC (± 15%), 50 / 60 HZ Galvanically Isolated
Power consumption
Idle: Max. 20 mA @ 24 V DC
Operating: Max. 900 mA RMS @ 24 V DC
Input signals
Po
AKS 32R (or similar Ratiometric pressure transmitter)
S2
Measuring range: -60 – +120 °C / -76 – 248 °F
S4
PT1000 or Digital input from external contact.
EEV Driver
Max. current 900mA RMS
Supported valves:
ETS 12.5, 25, 50, 100, 250, 400; ETS 6, CCMT 16-42; CTR; ETS Colibri 12-100C and User dened
Data communication
Type
RS485 – Modbus RTU (Not terminated internally)
Baud rate
19200
Address settings
Selectable via Software (default 164)
Connector
Pluggable
Internal Termination
No
Galvanic isolation
No
Environmental conditions
Storage
-34 °C to 71 °C / -30 °F to 160 °F
Operating
-25 °C to 60 °C / -13 °F to 140 °F
Humidity
<95% RH, non-condensing
Dimensions
25 × 50 × 80 mm / 0.98 × 1.97 × 3.15 inch
Battery backup
18 – 28 V DC, > 49 VmAh (Recommend using Danfoss EKE 2U)
Operation
Standalone or via MODBUS data communication
Connector type
4 way Mini t receptacle Molex 39-01-2040 or similar
2 way Mini t receptacle Molex 39-01-2020 or similar
Crimp: 24- 18 AWG Molex 39-020-0039 or similar.
Gateway
Standard RS485 to USB convertor. (eg; ADAM-4561, ICP DAS I-7561U-G)
Note: check compatibility of gateway tool with PC operating system
Display
None
PC suite
None (EIM 365 is to be connected and congured using supervisor systems).
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 5
Superheat controller, type EIM 365 (PV01)

PWR PO S4 S2 COM
ADR
+
-
GnD
+
D
EEV
1
3
2
V
M
B
P
T
C
E
Danfoss 80G8361
Black
Red
Yellow
Orange
ETS 6 valve
Green
Red
Black
White
Yellow
Orange
Black
Brown
B2
B1
A2
A1
ETS / KVS
Colibri®
CCMT / CTR valve
GND
TxD– TxD+
ETS 5M
V
P
M
B
T
C
E
Power Supply 24 V AC or DC
Pressure transmitter
Ratiometric 0.5 – 4.5 V i.e. AKS
32R
Modbus to master controller
Battery backup
Temperature sensors PT 1000
i.e. AKS 11
Regulation control On/O
switch (enable parameter HW
Main Switch to 1)
ETS 12.5, 25, 50, 100, 250, 400;
ETS 6, CCMT 16-42; CTR; ETS
Colibri 12-100C and user
dened
Dimension and Mounting
Figure 1: Connection diagram
IMPORTANT:
• The supply voltage is not galvanically separated from the input and output signals, hence it is not recommended
to use shared power supply.
• No voltage should be supplied externally, if S4 terminal is setup as a Regulation on/o switch.
• Do not reverse the polarity of the power connection cables or Modbus signal cable else it could damage the
terminals.
• EIM should be grounded and measures must be taken during installation to connect the board to a grounding
point.
Figure 2: Modbus one to one connection
Danfoss 80G166.10
PWR COM
M
RS485 (-) A
RS485 (+)
Superheat controller, type EIM 365 (PV01)
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M
A
B
R
N
G
Figure 3: Modbus in Daisy Chain
M
A B
RS485 (-)
RS485 (+)
RS485 (-)
RS485 (+)
Danfoss 80G165.10
PWR COM PWR COM
Master controller
EIM slave 1
EIM slave 2
120 Ohm min. 0.25 Watt termination
NOTE:
• Modbus transmission lines usually require termination resistors, especially for longer cable lengths.
• If two EIMs are connected remember to remove the addressing jumper on one of the EIMs. This will change the
address of EIM or else change the address of second unit using Modbus.
Mating connectors for EIM Controller Type Molex Mini-Fit Jr.™
80G159.10
11.6 mm
0.46 in
10.7 mm
0.42 in
8.5 mm
0.33 in
6.3 mm
0.25 in
80G160.10
80G161.10
10.6 mm
0.42 in
RECEPT CONTACT
24-18AWG Molex
39-00-0039 or similar
2 WAY MINI-FIT RECEPTACLE
Molex 39-01-2020 or similar
4 WAY MINI-FIT RECEPTACLE
Molex 39-01-2040 or similar
Connector kit for 5x EIM controller 080G1601
80G162.10
80G163.10
Connecting Modbus
• For the Modbus cable, it is best to use 24AWG shielded twisted-pair cable with a shunt capacitance of 16 pF/ft and
100Ω impedance.
• The max. permissible number of devices simultaneously connected to RS485 output is 32. The RS485 cable is of
impedance 120 Ω with maximum length of 1000 m.
• Terminal resistors 120 Ω for terminal devices are recommended for length > 1 m
Not in use
Ground
WARNING:
• Accidental damage, poor installation, or site conditions, can give rise to malfunctions of the control system, and
ultimately lead to a plant breakdown.
• Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation, for
example could still present problems. Electronic controls are no substitute for normal, good engineering practice.
• Danfoss will not be responsible for any goods, or plant components, damaged because of the above defects. It is
the installer’s responsibility to check the installation thoroughly, and to t the necessary safety devices.
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 7
Superheat controller, type EIM 365 (PV01)

1
2
3
Mounting temperature sensor
• Mount sensor on a clean surface without any paints.
• Remember to put on heat conducting paste and insulate the sensor.
• Sensor mounting max. 5 cm from the outlet of the evaporator to get the precise measurements.
Evaporator
Temperature sensor mounted close to the evaporator
Pressure sensor
Mounting pressure transmitter
Installation of the pressure transmitter is less critical but mounting of pressure transmitter should be closer to the
temperature sensor, right after the evaporator and with its head in upright position. Power supply
NOTE:
• Separate the sensor and digital input cables as much as possible (at least 3 cm) from the power cables to the loads
to avoid possible electromagnetic disturbance.
• Never lay power cables and probe cables in the same conduits (including those in the electrical panels).
Mounting EIM
• Grounding of secondary (output) of transformer is not recommended.
• Do not reverse the polarity of the power connection cables and avoid ground loops (i.e. avoid connecting one
eld device to several controllers as this may result in short circuits and can damage your device).
• Use individual transformers for EIM 365 controller to avoid possible interference or grounding problems in the
power supply.
• Use metal fasteners to place EIM board as this is important to reduce EMC and facilitate grounding.
Valve Stepper Motor Output
• All valves are driven with a 24 V supply chopped to control the current (Current driver).
• The stepper motor is connected to the “Stepper Valve” terminals (see terminal assignment) with Danfoss M12
connection cable.
• To congure stepper motor valves other than Danfoss stepper motor valves, the correct valve parameters must be
set as described in the Valve conguration section (see the conguration section for details).
• The correct valve must be dened in “Valve Type”, i.e., parameter 3002.
Superheat controller, type EIM 365 (PV01)
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Valve Cable Connection
Table 4: ETS Colibri / KVS Colibri/ ETS / KVS / CCM / CCMT / CTR
EIM terminals
A1
A2
B1
B2
Danfoss M12 Cable
White
Black
Red
Green
ETS Colibri® / KVS Colibri / CCMT / CTR / CCM Pin
number
3
4
1
2
ETS 6
Orange
Yellow
Red
Black
To be used with 4 pole terminal block.
Figure 4: ETS Colibri
NOTE:
For ETS 6 do not connect gray cable while using terminal block connection. If using JST 5pin its plug and play.
Guideline for long M12 cables on Danfoss stepper motor valves.
Long cables will lead to degradation of performance.
You can overcome this degradation by changing the settings for the valve driver.
This guideline is based on the cable type being the same type as the standard Danfoss stepper motor cable
Table 5: Recommended wire size and cable distance (twisted pair) between EIM controller and stepper motor valve
Cable length
1 m – 15 m
15 m – 30 m
Wire diameter for valve connection
0.52 / 0.33 mm2 20 / 22 AWG
Min. 0.52 mm2 20 AWG
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Superheat controller, type EIM 365 (PV01)

Applications
Superheat control
For superheat control, EIM implements a PI controller. The actual superheat is calculated based on temperature
sensor S2 and pressure sensor Pe values, and the controller will adjust the OD of the valve to bring the superheat to
the desired reference. If superheat is too low the ow in the expansion is decreased and superheat will be higher
and vice versa.
The EIM 365 controller is designed to be operated via Modbus and to rely on a constant connection to the master
controller of the system it is located within. In this conguration the master controller reads the readout registers
from the EIM 365 and uses the parameters to change the control behavior of the EIM 365 (see parameter list).
Figure 5: Superheat control
Evaporator temperature (Te) control for de-humidifying
For applications with a need to de-humidify the evaporator, it is possible to control on the saturated evaporator
temperature instead of the normal control signal.
Manual control (Stepper driver via Modbus)
In this application the EIM 365 is a stepper motor driver, where the valve can be controlled manually by setting the
desired opening degree via Modbus.
Superheat controller, type EIM 365 (PV01)
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 10