Honeywell
• 73
T
ECHNICAL
DATA
7.2.1
Technical information on control connections
Table 31. Technical information on standard I/O board
Standard I/O board
Terminal
Signal
Technical information
1
Reference output
+10VDC, +3%; Maximum current 10 mA
2
Analogue input,
voltage or current
Analogue input channel 1; Short-circuited protected
0- +10VDC (Ri = 200 k
)
4-20 mA (Ri =250
)
Resolution 0.1 %, accuracy ±1 %
Selection V/mA with dip-switches (see page 47)
3
Analogue input com-
mon (current)
Differential input if not connected to ground;
Allows ±20V differential mode voltage to GND
4
Analogue input,
voltage or current
Analogue input channel 2; Short-circuited protected
Defauit:4-20 mA (Ri =250
)
0-10 VDC (Ri=200k
)
Resolution 0.1 %, accuracy ±1 %
Selection V/mA with dip-switches (see page 47)
5
Analogue input com-
mon (current)
Differential input if not connected to ground;
Allows 20V differential mode voltage to GND
6
24VDC aux. voltage
+24VDC, ±10%, max volt. ripple < 100mVrms; max. 250mA
Dimensioning: max. 1000mA/control unit.
Short-circuit protected
7
I/O ground
Ground for reference and controls (connected internally to
frame earth through 1M
)
8
Digital input 1
Positive or negative logic
Ri = min. 5k
0...5VDC = “0”
15…30VDC = "1"
9
Digital input 2
10
Digital input 3
11
Common A for DIN1-
DIN6.
Digital inputs can be disconnected from ground, see chapter
5.1.2.2.
12
24VDC aux. voltage
+24VDC, ±10%, max volt. ripple < 100mVrms; max. 250mA
Dimensioning: max. 1000mA/control unit.
Short-circuit protected
13
I/O ground
Ground for reference and controls (connected internally to
frame earth through 1M
)
14
Digital input 4
Positive or negative logic
Ri = min. 5k
0...5VDC = “0”
15…30VDC = "1"
15
Digital input 5
16
Digital input 6
17
Common A for DIN1-
DIN6.
Digital inputs can be isolated from ground, see chapter 5.1.2.2.
18
Analogue signal
(+output)
Analogue output channel 1, selection 0 -20mA, load <500
Default:0-20 mA/0-10VDC
Resolution 0.1 %, accuracy ±2 %
Selection V/mA with dip-switches (see page 47)
Short-circuited protected.
19
Analogue output com-
mon
30
24VDC 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 page 47)
B
RS485
