Rockwell Automation Publication 1606-RM121A-EN-P - October 2020
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Connection Terminals
The terminals are IP20 fingersafe constructed and are suitable for field wiring
and factory wiring. Ensure that all strands of a stranded wire enter the
terminal connection. The use of ferrules is recommended.
Lifetime Expectancy
The lifetime expectancies that are shown in the table indicate the minimum
operating hours (service life). The lifetime expectancy of the built-in
electrolytic capacitors determines the lifetime expectancy of the power supply.
Lifetime expectancy is specified in operational hours and is calculated
according to the manufacturer specification of the capacitor.
The manufacturer of the electrolytic capacitors only states a maximum life of
up to 15 years (131,400 hr). Any number that exceeds this value is a calculated
theoretical lifetime, which can be used to compare devices.
Mean Time Between Failure
Mean Time Between Failure (MTBF) is calculated according to statistical
device failures, and indicates reliability of a device. The MTBF value is a
statistical representation of the likelihood of a unit to fail and does not
necessarily represent the life of a product. An MTBF value of, for example,
1,000,000 hr means that statistically one unit fails every 100 hours if 10,000
units are installed in the field. However, it cannot be determined if the failed
unit has been running for 50,000 hr or only for 100 hr.
For these types of units, the Mean Time To Failure (MTTF) value is the same as
the MTBF value.
Attributes
Descriptions
Type
Screw terminals
Solid wire
6 mm
2
max
Stranded wire
4 mm
2
max
American Wire Gauge
AWG 20…10
Wire diameter max (including ferrules)
2.8 mm (0.11 in.)
Wire stripping length
7 mm (0.28 in.)
Recommended tightening torque
1 N•m (9 lb•in)
Screwdriver
3 mm (0.12 in.) slotted or Phillips No 1
Attributes
Values
Notes
AC 100V
AC 120V
AC 230V
Lifetime expectancy
260,000 hr
292,000 hr
309,000 hr
At 24V, 1.9 A and 40 °C (104 °F)
640,000 hr
720,000 hr
815,000 hr
At 24V, 1.9 A and 25 °C (77 °F)
39,000 hr
64,000 hr
102,000 hr
At 24V, 3.8 A and 40 °C (104 °F)
91,000 hr
147,000 hr
287,000 hr
At 24V, 3.8 A and 25 °C (77 °F)
Attributes
Values
Notes
AC 100V
AC 120V
AC 230V
MTBF SN 29500, IEC 61709
1,174,000 hr
1,273,000 hr
1,507,000 hr
At 24V, 3.8 A and 40 °C (104 °F)
2,251,000 hr
2,406,000 hr
2,752,000 hr
At 24V, 3.8 A and 25 °C (77 °F)
MTBF MIL HDBK 217F
751,000 hr
760,000 hr
698,000 hr
At 24V, 3.8 A, 40 °C (104 °F); Ground Benign GB40
1,085,000 hr
1,099,000 hr
1,018,000 hr
At 24V, 3.8 A, 25 °C (77 °F); Ground Benign GB25
219,000 hr
224,000 hr
220,000 hr
At 24V, 3.8 A, 40 °C (104 °F); Ground Fixed GF40
288,000 hr
294,000 hr
293,000 hr
At 24V, 3.8 A, 25 °C (77 °F); Ground Fixed GF25
