10
Manual RS8CS302 © Danfoss 07-2005
EKC 315A
Data
Ordering
Data communication
Supply voltage
24 V a.c. +/-15% 50/60 Hz, 80 VA
(the supply voltage is galvanically separated from the
input and output signals)
Power consump-
tion
Controller
TQ actuator
AKV coil
5 VA
75 VA
55 VA
Input signal
Current signal
4-20 mA or 0-20 mA
Pressure transmitter 4-20 mA from AKS 33
Digital input from external contact function
Sensor input
2 pcs. Pt 1000 ohm
Output signal
Current signal
4-20 mA or 0-20 mA
Load
Max. 200 ohm
Relay output
1 pcs. SPST
AC-1: 4 A (ohmic)
AC-15: 3 A (inductive)
Alarm relay
1 pcs. SPST
Actuator
Input
Temperature signal from sen-
sor in the TQ actuator
Output
Pulsating 24 V a.c. to actuator
Data communica-
tion
Possible to connect a data communication module
Ambient
temperature
During operation
During transport
-10 - 55°C
-40 - 70°C
Enclosure
IP 20
Weight
300 g
Mounting
DIN rail
Display
LED, 3 digits
Terminals
max. 2.5 mm
2
multicore
Approvals
EU Low Voltage Directive and EMC demands re CE-
marking complied with.
LVD-tested acc. to EN 60730-1 and EN 60730-2-9
EMC-tested acc. to EN50081-1 and EN 50082-2
Type
Function
Code no.
EKC 315A
Superheat controller
084B7086
EKA 173
Data communication module
(accessories), (FTT 10 module)
084B7092
EKA 175
Data communication module
(accessories), (RS 485 modul)
084B7093
EKA 174
Data communication module
(accessories), (RS 485 module)
with galvanic separation
084B7124
Temperature sensor Pt 1000 ohm / Pressure transmitter type AKS 33 / TQ
Valves / AKV valves: ............. Kindly refer to catalogue RK0YG...
Necessary connections
Terminals:
25-26 Supply voltage 24 V a.c.
23-24 Supply to actuator
17-18 Only at TQ actuator: Signal from actuator
20-21 Pt 1000 sensor at evaporator outlet (S2)
14-15 Pressure transmitter type AKS 33
9-10
Relay switch for start/stop of solenoid valve
1-2
Switch function for start/stop of regulation. If a switch is
not connected, terminals 1 and 2 must be shortcircuited.
Application dependent connections
Terminal:
21-22 Pt 1000 sensor for measuring air temperature (S3)
12-13 Alarm relay
There is connection between 12 and 13 in alarm situations
and when the controller is dead
18-19 Current signal from other regulation (Ext.Ref.)
2-5
Current output for showing superheat or air temperature.
Or for signal to a slave module
3-4
Data communication
Mount only, if a data communication module has been
mounted.
It is important that the installation of the data communi-
cation cable be done correctly. Cf. separate literature No.
RC8AC...
Connections
Wire length TQ:
See appendix 2