ABB UNITROL 1020 - Page 38

Chapter 3 - Device Overview 
30 3BHS335648 E82 UNITROL 1020 User Manual
Input Function
Uin0%
Min (-10… +10 V)
Uin100%
Max (-10…10 V)
Remarks
Digital Input 13(+) & 14(-)
Set to 2.0 V
Set to 5.0 V
See graphic below
Digital Input 15(+) & 16(-)
Set to 2.0 V
Set to 5.0 V
See graphic below
Digital Input 17(+) & 18(-)
Set to 2.0 V
Set to 5.0 V
See graphic below
External setpoint input
Input to the summing
point
Uin0%
[V]
Uin100%
Internal signal value [%]
Setpoint max
10
Setpoint min
-10
Ext. Setpoint Auto
Uin0%
[V]
Uin100%
UM Aux
[%]
max
10
min
10
-10
-10
Analog in
 Input voltage of the cooling media temperature
Range: Uin0% = - 10.0 V refers to - 100 °C
Uin100% = +10.0 V refers to +100 °C
Condition of the
digital inputs
(DI 13 to DI18)
Uin
DI13 = 1
DI14 = 1
[V]
2.0
5.0
-2.0-5.0
DI14 = 0
DI13 = 0
Status of the digital
inputs
-> Din13(+) = 0
-> Din14(-) = 1
-> Din13(+) = 1
-> Din14(-) = 0
Note: AI and BI must not be active simultaneously, DI13 and DI14 will both be “0”