Table 53: The standard I/O board
Standard I/O board
Terminal
Signal
Technical information
12
24 V aux. voltage
+24 V, ±10%, max volt. ripple < 100mVrms
max. 250 mA
Short-circuit protected
13
I/O ground
Ground for reference and controls (connected internally to
frame ground through 1 MΩ)
14
Digital input 4
Positive or negative logic
Ri = min. 5 kΩ
0-5 V = 0
15-30 V = 1
15
Digital input 5
16
Digital input 6
17
Common A for DIN1-DIN6
Digital inputs can be isolated from ground, see chapter
6.2.2.2 Isolation of digital inputs from ground.
18
Analogue signal (+output)
Analogue output channel 1, selection 0 -20 mA, load <500 Ω
Default: 0-20 mA
0-10 V
Resolution 0.1 %, accuracy ±2 %
Selection V/mA with dip-switches (see chapter 6.2.2.1 Selec-
tion of terminal functions with DIP switches)
Short-circuit protected
19
Analogue output common
30
24V auxiliary input voltage
Can be used as external power backup for the control unit
A
RS485
Differential receiver/transmitter
Set bus termination with dip switches (see chapter 6.2.2.1
Selection of terminal functions with DIP switches). Termination
resistance = 220 Ω
B
RS485
TECHNICAL DATA ON CONTROL CONNECTIONS
VACON · 153
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