Connection of input di1
4
Digital input, configurable as switch or push-button
Connection of outputs OUT1/2
5
Relay outputs 250V/2A normally open with common contact connection
Connection of output OUT3
6
g
logic (0..20mA / 0..12V)
h
voltage (0/2...10V)
i
current (0/4...20mA)
i
transmitter power supply
Connection of inputs di2/3
7
(option)
Digital inputs (24VDC external), galvanically isolated, configurable as switch or
push-button
Connection of output U
T
8
(option)
Supply voltage connection for external energization
Connection of bus interface
9
(option)
RS422/485 interface with Modbus RTU protocol
a
If U
T
and the universal output OUT3 is used there may be no external galvanic
connection between measuring and output circuits!
Electrical connections
Digital 280-1
Terminal connection
7
Option
+24VDC
5mA
5mA
0V
1
2
3
K
+
-
+
-
+
-
17,5V
22mA
OUT3
J
J
x
1
7
5
8
6
9
10
11
12
13
14
15
4
3
5
1
7
5
8
6
9
10
11
12
13
14
15
4
3
(2)
17
16
7 8
di2/3, U
T
2-wire transmitter supply
1
2
3
K
+
-
+
-
13V
22mA
7
8
9
10
11
12
13
14
15
6
OUT3 transmitter supply
Summary of Contents for Digital 280-1
Page 48: ...12 Notes Notes Digital 280 1 48...
Page 49: ...Notes 49 Digital 280 1...
Page 50: ...Digital 280 1 50...
