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PRESYS
| Instruments
2.5 - Connection Diagram
GND
EARTH
Notes:
(1) Referring to first control loop
(2) Referring to second control loop
Outputs 1, 2, 3 , 4 and communication are optional
Transmitter Power Supply +24V
COMMUNICATION
RS-422/485
Tx- Tx+ Rx- Rx+
COMMOM
RS-232
Tx
GND
COMMOM
10
9
12
11
24
23
22
21
NEUTRAl LINE
OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1
Relay 4
POWER SUPPLY
(1)
NO
C
23 (+)
24Vdc
+24V
24 ( )
Logic
SCR
Alarm or cooling
control (2)
(2)
INPUT 2
INPUT 1
Rx
5
4
3
8
7
6
20
19
18
17
16
15
14
Relay 3
Relay 2
(1)
(1)
(1)
(1)
NC
NO
C
NC
NC
C
+24V
+24V
Logic
Logic
SCR
SCR
Alarm or cooling
control (1)
4 to 20 mA
+
0 to 5 V
+
0 to 10 V
Control (2)
or alarm
DCY-2050 and DCY-2051
Current 4-20mA
Voltage 0 to 10V
RTD
2
1
13
Relay 1
(1)
NC
C
+24V
Logic
SCR
+
+
Only for
control (1)
Installation
Page 15
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