DKRCC.PI.RR0.A3.02
© Danfoss A/S (AC-MCI / sw), 2016-12
Connection overview table
Function
Position Pin name Description
Power
supply
1
24V L/+
Power supply
2
24V N/ -
Battery
backup
3
Bat+
24 V DC
Battery backup
4
BAT-
Stepper
motor
driver
5
A1
Stepper motor
6
A2
7
B1
8
B2
Data com-
munication
9
RS485 B -
RS485 Modbus/
external display
EKA 164A
10
RS485 A+
11
Shield
12
12 V
13
GND
Tempera-
ture sensor
14
S2
Pt 1000
15
GND
Common ground
for S2 / S4
16
S4
Pt 1000 sensor
Pressure
transmitter
17
5 V
18
sig
19
GND
Common -
External
reference
20
DI
Switch
21
GND (-)
Common ground
for 20 /22
22
Sig (+)
Analog signal
Not in use
23
–
–
Alarm
24
Com
Common
25
NC
Normal closed
26
NO
Normal open
Connections
ETS Colibri®
EKD 316C
White
A1
5
Black
A2
6
Red
B1
7
Green
B2
8
Important notes
Terminals
3 - 4
Battery backup (the voltage will close the ETS valve if the controller looses its supply voltage).
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 battery alarm.
9 - 13
Operation via modbus communication either EKA 164A or system unit + software.
It is
important
that the installation of the data communication cable is done correctly.
For detail refer to our EKD 316 manual.
20 - 21
Switch function for start / stop of regulation.
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 AC / DC
Battery
back-up
Temperature
sensor S2
Temperature
sensor S4
Alarm
relay
DI
switch
Pressure
transmitter P0
AKS 32R
Modbus
EKA 164A
ETS C valve
or similar
Danf
os
s
84B3186.10
+
–
- common
+ supply
+ output
17
18
19
NC
Co
m
NO
Fuse 2 A
1 2
3
Connection overview
1
14 15
