CONN # pin
Signal
Direction
Type of signal
Description
J1
1
F
input
85-265Vac phase
Power supply
2
N
input
85-265Vac neutral
Power supply
3
HOT_CL
output
24-230Vac TRIAC 4A
Hot valve (Close)
4
HOT_COM
output
24-230Vac TRIAC COM
Hot valve (COM)
5
HOT_OP
output
24-230Vac TRIAC 4A
Hot valve (Open)
6
COLD_CL
output
24-230Vac TRIAC 4A
Cool valve (Close)
7
COLD_COM
output
24-230Vac TRIAC COM
Cool valve (COM)
8
COLD_OP
output
24-230Vac TRIAC 4A
Cool valve (Open)
J2
9
RA_COM
output
24-230Vac COM
Fan Speed COM
10
R1
output
24-230Vac RELAY 8A
V1 Fan Speed
11
R2
output
24-230Vac RELAY 8A
V2 Fan Speed
12
R3
output
24-230Vac RELAY 8A
V3 Fan Speed
13
RB_COM
output
Not used
14
-
N/A
Not used
15
-
N/A
Not used
16
-
N/A
Not used
J3
40
DI1
input
digital 1 /24Vac
Window contact
39
DI2
input
digital 2 /24Vac
ON-OFF contact
38
DI3
input
digital 3 /24Vac
Summer/Winter contact
37
DI4
input
digital 4 /24Vac
Comfort-economy contact
36
DI_COM
input
digital COM
COM
35
S1
input
analogue input
Return sensor
34
S2
input
analogue input
Remote set
33
S3
input
analogue input
Auxiliary Loop Return Sensor
32
S4
input
analogue input
Remote Set Auxiliary Loop
31
S_COM
input
COM
COM
30
OCC
output
COM Open Col12V
Com Open Col12V
29
OC1
output
Open Collector 1
Open Collector for external RELAY 1
J4
28
OC2
output
Open Collector 2
Open Collector for external RELAY 2
27
AO2
output
Analogue output 2
Modulating cooling valve 2 – fan
26
AO1
output
Analogue output 1
Modulating heating valve 1 – sequence
25
AOC
output
COM
COM / Shield
24
485-
Bidir
BUS RS485 -
Supervisor Bus (-)
23
485+
Bidir
BUS RS485 +
Supervisor Bus (+)
22
+12Vcc
output
+12V (sensor NR9000-RT)
+12V (sensor NR9000-RT)
21
SDA
Bidir
BUS TX (sensor NR9000-RT)
BUS TX (sensor NR9000-RT)
20
SCL
Bidir
BUS RX (sensor NR9000-RT)
BUS RX (sensor NR9000-RT)
19
GND
Bidir
GND (sensor NR9000-RT)
GND (sensor NR9000-RT)
18
TTL+
Bidir
Link Bus +
Bus I/O exp
17
TTL-
Bidir
Link Bus -
Bus I/O expansion -
1
st
Issue rev. c
12/2015
DBL408e
Page 3
