Technical data

Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
38
Table 10: Digital inputs
Power supply version PS1/240 V (High) PS1/240 V (Medium),
PS2/240 V
PS1/48 V (Low),
PS2/48V
Input voltage, dc 220 V 110/125/220 V 24/48/60/110/125/
220 V
Operating range, dc 155…265 V 80...265 V 18...265 V
Current drain ~2…25 mA
Power consumption/input <0.8 W
Pulse counting (specific digital inputs),
frequency range
0…100 Hz
Time synchronization (specific digital
inputs) synchronization rate
once per minute or once per second
Table 11: RTD/analogue inputs
Supported RTD sensors 100 Ω Platinum TCR 0.00385 (DIN 43760)
250 Ω Platinum TCR 0.00385
1000 Ω Platinum TCR 0.00385
100 Ω Nickel TCR 0.00618 (DIN 43760)
120 Ω Nickel TCR 0.00618
250 Ω Nickel TCR 0.00618
1000 Ω Nickel TCR 0.00618
10 Ω Copper TCR 0.00427
120 Ω Nickel TCR 0.00672 (MIL-T-24388C)
Max lead resistance
(three-wire
measurement)
200 Ω per lead
Accuracy ±0.5% of full scale
±1.0% of full scale for 10 Ω Copper RTD
Isolation 2 kV (inputs to outputs and inputs to protective earth)
Sampling frequency 5 Hz
Response time ≤ Filter time + 30 ms (430 ms...5.03 s)
RTD/ Resistance
sensing current
max 4.2 mA RMS
6.2 mA RMS for 10 Ω Copper
Current input impedance 274 Ω ±0.1%
Table 12: Signal outputs
Max system voltage 250 V ac/dc
Continuous carry 5 A
Make and carry for 0.5 s 10 A
Make and carry for 3 s 8 A
Breaking capacity when control circuit time-constant
L/R <40 ms, at 48/110/220 V dc
1 A/0.25 A/0.15 A