14 Rockwell Automation Publication 1606-RM100A-EN-P - July 2020
Power Supply - 24V, 5 A, 120 W, Single-phase Input Reference Manual
Daisy Chaining
Daisy chaining (jumping from one power supply output to the next) is allowed
as long as the average output current through one terminal pin does not
exceed 25 A or 15 A for the 1606-XLE120EH. If the current is higher, use a
separate distribution terminal block as shown in Figure 23
.
Lifetime Expectancy The Lifetime expectancy that is shown in the table indicates the minimum
operating hours (service life) and is determined by the lifetime expectancy of
the built-in electrolytic capacitors. Lifetime expectancy is specified in
operational hours and is calculated according to the capacitor manufacturer
specification. The manufacturer of the electrolytic capacitors only guarantees
a maximum life of up to 15 years (131,400 hr). Any number exceeding this value
is a calculated theoretical lifetime that can be used to compare devices.
Mean Time Between Failure
(MTBF)
MTBF is calculated according to statistical device failures, and indicates
reliability of a device. It is the statistical representation of the likelihood of a
unit to fail and does not necessarily represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to
fail. An MTBF figure of, for example, 1,000,000 hr means that statistically one
unit will fail 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 50,000hr or
only for 100 hr.
For these types of units, the MTTF (Mean Time To Failure) value is the same
value as the MTBF value.
Figure 22 - Daisy Chain of Outputs Figure 23 - Distribution Terminals Use
Load
+
-
Power
Supply
+ +
- -
Output
Power
Supply
+ +
- -
Output
Maximal 15 A continuous for 1606-XLE120EH
Maximal 25 A continuous for all other units
Distribution
Terminals
Load
+
-
Power
Supply
+ +
- -
Output
Power
Supply
+ +
- -
Output
AC 100V AC 120V AC 230V
Lifetime Expectancy
265,000 hr 270,000 hr 274,000 hr At 24V, 2.5 A and 40 °C (104 °F)
748,000 hr 764,000 hr 775,000 hr At 24V, 2.5 A and 25 °C (77 °F)
128,000 hr 143,000 hr 166,000 hr At 24V, 5 A and 40 °C (104 °F)
363,000 hr 405,000 hr 469,000 hr At 24V, 5 A and 25 °C (77 °F)
AC 100V AC 120V AC 230V
MTBF SN 29500, IEC
61709
800,000 hr 807,000 hr 867,000 hr At 24V, 5 A and 40 °C (104 °F)
1,402,000 hr 1,414,000 hr 1,510,000 hr At 24V, 5 A and 25 °C (77 °F)
MTBF MIL HDBK
217F
339,000 hr 343,000 hr 368,000 hr At 24V, 5 A and 40 °C (104 °F); Ground Benign GB40
490,000 hr 496,000 hr 529,000 hr At 24V, 5 A and 25 °C (77 °F); Ground Benign GB25
81,000 hr 83,000 hr 89,000 hr At 24V, 5 A and 40 °C (104 °F); Ground Fixed GF40
800,000 hr 807,000 hr 867,000 hr At 24V, 5 A and 40 °C (104 °F)
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