Danfoss EKD 316C Installation guide
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Installation guide
Electronic superheat controller - Modbus version
Type EKD 316C (Colibri®)
Introduction
EKD 316 is a superheat controller that can be used where there are requirements for accurate control of superheat.
Typically it will operate in Commercial air conditioning, heat pumps, commercial refrigeration, food retail and
084R8 047
industrial application. Compatible valve - Danfoss ETS / ETS C, K VS / KVS C and CCM / CCMT valves.
English
084R8 047
Supply voltage
Power consumption
24 V AC / DC ±15%, 50/60 Hz, 22 VA / 15 Watt
(the supply voltage is not galvanically
separated from the input and output signals)
Controller
ETS C / KVS C
ETS, KVS, CCM, CCMT
5 VA
7.2 VA
1.3 VA
Current signal * 4 - 20 mA or 0 - 20 mA
Input signal
*)Ri: mA: 400 Ohm
V: 50 kOhm
Voltage signal * 0 - 10 V or 1 - 5 V
Pressure transmitter
e.g. AKS 32R
0.5 - 4.5V DC ratiometric type
(10% - 90% of supply voltage)
Digital input from external contact function
Sensor input 2 pcs. Pt 1000 ohm
DI : < 800 Ohm = ON
DI : > 30 kOhm = OFF
Alarm relay 1 pcs. SPDT Max 24V, 1A resistive - Class II
Step motor output Pulsating 30 - 300 mA
Data communication RS 485 Modbus data communication
Operations 0 – 55 °C / 32 – 131 °F
Environments
Transportation -40 – 70 °C / -40 – 158 °F
Humidity 20 - 80 % Rh, none condensing
No shock influence/vibrations
Enclosure IP 20
Compatible valves Bipolar stepper motor valves
Standalone controller
ETS Colibri®
Danfoss
84B3177.10
Danfoss
Danfoss
Valve driver
© Danfoss | Climate Solutions | 2021.03
ETS Colibri®
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Info for UK customers only:Danfoss Ltd. Oxford Road, UB9 4LH Denham, UK
DIN rail mounting / dismounting
The unit can be mounted onto a 35 mm DIN rail (in accordance with EN 5022) simply by snapping it into place
and securing it with a stopper to prevent sliding. It is dismounted by gently pulling the stirrup located in the
base of the housing.
1
Danfoss
84B2714.11
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“Click”
General warnings
• Every use that is not described in this manual is considered incorrect and is not authorised by the
manufacturer.
• Verify that the installation and operating conditions of the device respect the ones specified in the manual,
specially concerning the supply voltage and environmental conditions.
• This device contains live electrical components therefore all the service and maintenance operations
must be performed by qualified personnel.
• The device cannot be used as a safet y device.
• Liabilit y for injury or damage caused by the incorrect use of the device lies solely with the user.
Installation warnings
- The installation must be executed according the local standards and legislation of the country.
- Always operate on the electrical connections with the device disconnected from the main power supply.
- Before carrying out any maintenance operations on the device, disconnect all the electrical connections.
- For safet y reasons the appliance must be fitted inside an electrical panel with no live parts accessible.
- Don’t expose the device to continuous water sprays or to relative humidity greater than 80%.
- Avoid exposure to corrosive or pollutant gases, natural elements, environments where explosives or mixes of
flammable gases are present, dust, strong vibrations or chock, large and rapid fluctuations in ambient temperature
that in combination with high humidity can condensate, strong magnetic and/or radio interference
(e.g. transmitting antennae).
- When connecting loads beware of the maximum current for each relay and connector.
- Use cable ends suitable for the corresponding connectors. After tightening the screws of connectors, slightly tug
the cables to check their tightness.
- Use appropriate data communication cables. Refer to the Fieldbus Installation Guide for the kind of cable to be
used and setup recommendations.
- Reduce the path of the probe and digital inputs cables as much as possible, and avoid spiral paths enclosing power
devices. Separate from inductive loads and power cables to avoid possible electromagnetic noises.
- Avoid touching or nearly touching the electronic components fitted on the board to avoid electrostatic discharges.
Warnings
• Use a class II category transformer for 24 V AC power supply.
• Do not ground the 24 V AC wires.
• By connecting any EKD 316C inputs to mains voltage will permanently damage the controller.
• Do not apply voltage to the controller before the wiring is completed.
3
Dismounting
Pull down the stirrup to dismount unit from din rail
Connection of the terminals to earth will destroy the controller.
1,2 3,4 21,22
© Danfoss | Climate Solutions | 2021.03
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Po
24
EKA 164A
ETS C valve
Connection overview
Connections
ETS Colibri® EKD 316C
White A1 5
Black A2 6
Red B1 7
Green B2 8
Connection overview table
Function Position Pin name Description
Power
supply
Batter y
backup
1 24V L /+
2 24V N/ -
3 Bat+
4 BAT-
wer supply
V AC / DC
Fuse 2 A
Battery
or similar
back-up
–
+
1
Modbus
5 A1
Stepper
motor
driver
6 A2
7 B1
8 B2
9 RS485 B -
10 RS485 A+
11 Shield
12 12 V
13 GND
14 S2 Pt 1000
15 GND
16 S4 Pt 1000 sensor
17 5 V Supply +
18 sig Output +
19 GND Common -
20 DI Switch
21 GND (-)
22 Sig (+) Analog signal
Temperature
sensor S2
Temperature
sensor S4
+ output
+ supply
Danfoss
84B3186.10
17
18
3
12
14 15
19
- common
DI
switch
Pressure
transmitter P0
AKS 32R
Alarm
relay
Data
communication
Temperature sensor
NC
Com
NO
Pressure
transmitter
External
reference
Not in use 23 – –
24 Com Common
Alarm
25 NC Normal closed
26 NO Normal open
Important notes
Terminals
3 - 4 Batter y backup (the voltage will close the ETS valve if the controller looses its supply voltage).
9 - 13 Operation via modbus communication either EKA 164A or system unit + software.
20 - 21 Switch function for start / stop of regulation.
The battery voltage must not be connected from terminals 1 and 2. Power of the battery lower
than 16.5 V will trigger the low batter y alarm.
It is important that the installation of the data communication cable is done correctly.
For detail refer to our EKD 316 manual.
Note: If a switch is not connected, terminals 20 and 21 must be short circuited. Do not connect
external power supply to these terminals, else it will damage the controller.
24 - 26 Alarm relay: There is connection between 24 and 26 in alarm situations.
Power supply
24 V DC
Battery backup
Stepper motor
RS485 Modbus/
external display
EK A 164A
Common ground
for S2 / S4
Common ground
for 20 /22
© Danfoss | Climate Solutions | 2021.03
AN220086430005en-000502 | 3
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