AC power consumption
2 A energy supply unit
5 A energy supply unit
10 A energy supply unit
DC input voltage
DC power consumption at 24 V
Input module:
Relay module:
Output module:
Display:
Interface unit (RS-232):
Readings and acoustic signals
Storage temperature
Operating temperature
Relative humidity (RH) during
operation and storage
Warm up time
Response time
Measurement accuracy
Module mounts
Relays (all modules)
Type
Contact material
Nominal switching capacity
Max. switching power
Switching voltage
Switching current
Output module
Output range
Insulation
Resolution
Accuracy
Maximum load
Storage temperature
Transfer function
Input signal
> 20.0 mA
4.3 to 20 mA
®
REGARD
3900
Typical: < 0.5 A; max. 0.5 A
Typical: 0.5 A; max. 1 A
Typical: 1 A; max. 2 A
18 to 30 V DC
60 mA with the exception of the transmitter
200 mA
300 mA
170 mA
50 mA
Readings: LEDs and display
Acoustic signals: Acoustic alarm sounder
-25°C to +70°C
0 to +55°C
REGARD® 3900/3920:
0 to 100%, non-condensing
REGARD® 3910:
0 to 95%, non-condensing
< 40 s
< 2 s
Within 1% of the measured value
M3
Zero potential, single pole changeover relay
Silver alloy
5 A 250 V AC; 5 A 30 V DC
1250 VA; 150 W
Max.: 250 V AC; 100 V DC
Min.: 10 V
Max.: 5 A
Min.: 100 mA
0.1 to 21.7 mA
50 V
0.1 mA
Within 1% of the input signal (minus zero termi-
nal)
500 Ω
-25°C to +70°C
Indication on the display
Over-range
Linear gas measurement in accordance
with selected range
Technical data