ABB RET 541 Product Manual page 33

Transformer Terminal
Table 10: Digital inputs
Power supply version
Input voltage, dc
Nominal treshold voltage, dc
- operating range, dc
Current drain
Power consumption/input
Pulse counting (specific digital inputs),
frequency range
Time synchronization (specific digital
inputs) synchronization rate
Table 11: RTD/analog inputs
100 Platinum
Supported RTD sensors
250 Platinum
1000 Platinum
100 Nickel
120 Nickel
250 Nickel
1000 Nickel
10 Copper
120 Nickel
200 per lead
Max lead resistance
(three-wire measurement)
Accuracy ±0.5% of full scale
±1.0% of full scale for 10 Copper RTD
Isolation 2 kV (inputs to outputs and inputs to protective earth)
Sampling frequency 5 Hz
 Filter time + 30 ms (430 ms...5.03 s)
Response time
RTD/ Resistance sensing max 4.2 mA RMS
6.2 mA RMS for 10 Copper
current
Current input impedance 274 ±0.1%
Table 12: Analog outputs
Output range
Accuracy
Max load
Isolation
Response time
Table 13: Signal outputs
Max system voltage
Continuous carry
Make and carry for 0.5 s
Make and carry for 3 s
Breaking capacity when control circuit time-constant
L/R <40 ms, at 48/110/220 V dc
RET 541, RET 543, RET 545
PS1/240 V (High) PS1/240 V (Medium),
PS2/240 V
220 V 110/125/220 V
155 V 80 V
155...265 V 80...265 V
~2...25 mA
<0.8 W
0...100 Hz
once per minute or once per second
TCR 0.00385 (DIN 43760)
TCR 0.00385
TCR 0.00385
TCR 0.00618 (DIN 43760)
TCR 0.00618
TCR 0.00618
TCR 0.00618
TCR 0.00427
TCR 0.00672 (MIL-T-24388C)
0...20 mA
±0.5% of full scale
600 
2 kV (output to output, output to inputs and output to
protective earth)
85 ms
250 V ac/dc
5 A
10 A
8 A
1 A/0.25 A/0.15 A
1MRS755543
PS1/48 V (Low),
PS2/48V
24/48/60/110/125/
220 V
18 V
18...265 V
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