Honeywell SmartVFD HVAC MR4 User Manual page 68

P
RODUCT DATA
7.2.1 Technical information on control connections
Basic I/O board
Terminal
1
Reference output
Analogue input,
2
voltage or current
Analogue input common (cur-
3
rent)
Analogue input,
4
voltage or current
Analogue input common (cur-
5
rent)
6
24V aux. voltage
7
I/O ground
8
Digital input 1
9
Digital input 2
10
Digital input 3
11
Common A for DIN1-DIN6
12
24V aux. voltage
13
I/O ground
14
Digital input 4
15
Digital input 5
16
Digital input 6
17
Common A for DIN1-DIN6
18
Analogue signal (+output)
19
Analogue output common
30
24V auxiliary input voltage
A
RS485
B
RS485
Signal
+10V, +3%; Maximum current 10 mA
Analogue input channel 1
0- +10V (Ri = 200 k)
4-20 mA (Ri =250 )
Resolution 0.1 %, accuracy ±1 %
Selection V/mA with dip-switches (see page 52)
Differential input if not connected to ground;
Allows ±20V differential mode voltage to GND
Analogue input channel 1
Defauit:4-20 mA (Ri =250 )
0-10 V (Ri=200k)
Resolution 0.1 %, accuracy ±1 %
Selection V/mA with dip-switches (see page 52)
Differential input if not connected to ground;
Allows 20V differential mode voltage to GND
+24VDC, ±10%, max volt. ripple < 100mVrms; max. 250mA
Dimensioning: max. 1000mA/control box.
Short-circuit protected
Ground for reference and controls (connected internally to
frame ground through 1M)
Positive or negative logic
Ri = min. 5k
18...30V = "1"
Digital inputs can be disconnected from ground, see chapter
6.1.2.2.
+24VDC, ±10%, max volt. ripple < 100mVrms; max. 250mA
Dimensioning: max. 1000mA/control box.
Short-circuit protected
Ground for reference and controls (connected internally to
frame ground through 1M)
Positive or negative logic
Ri = min. 5k
18...30V = "1"
Digital inputs can be disconnected from ground, see chapter
6.1.2.2.
Analogue output channel 1, selection 0 -20mA,
load <500 
Default:0-20 mA
0-10V
Resolution 0.1 %, accuracy ±2 %
Selection V/mA with dip-switches (see page 52)
Can be used as external power backup for the control unit
(and fieldbus)
Differential receiver/transmitter
Set bus termination with dip switches (see page 52)
Table 22. Technical information on basic I/O board
Technical information
• 66
Honeywell
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