8 ATR 621 - User manual
2.2 Hardware features
Analogue inputs
AI1 - Con gurable via
software Thermocouples:
type K,S,R,J,E,N. Automa-
tic compensation of cold
junction from 0…50 °C.
Thermoresistances: PT100,
Input V/mA: 0-10V,
0-20mA, 4-20mA.
Tolerance (25°C)
+/-0.2 % ± 1 digit for thermo-
couple,
thermoresistance
and V/mA.
Cold junction accuracy
0.1°C/°C
Impedance:
0-10V: Ri>110KΩ
0-20mA: Ri<5Ω
4-20mA: Ri<5Ω
Relay outputs
Con gurable as control and
alarm output.
Contacts:
- Q1, Q2, Q3: 8A-250V~ for
resistive charges
- Q4: 5A-30V for resistive
charges
Output SSR/ V/
mA
1 SSR /V/mA
Selectable as command
output, alarm or process/
setpoin retransmission.
Con gurable:
SSR 12V 30mA
0-10V (9500 points)
0-20mA (7500 points)
4-20mA (6000 points)
Supply
Extended range
24…230Vac/Vdc ±15%
50/60Hz
Consumption: 5.5VA
2.3 Software features
Control algori-
thms
ON-OFF with hysteresis.
P, PI, PID, PD time proportioned.
Proportional
band
0...9999°C o °F
Integral time 0,0...999,9 sec (0 excludes)
Derivative time 0,0...999,9 sec (0 excludes)
Controller fun-
ctions
Manual or automatic tuning, selectable alarms and
functions selection by digital input.
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