Table of Contents
Advertisement
Lifetime Expectancy and
Mean Time Between Failure
Terminals and Wiring
8
The redundancy module has two input channels, which are completely
independent from each other. The dual-input redundancy module can be
considered as two single redundancy modules combined in one housing. The
only common point is the circuit trace that ties the two separate circuits
together at the output.
The Mean Time Between Failure (MTBF) values in the following table are for
the entire dual-input module. If you need the MTBF number of only one path,
double the value from the table.
Input / Output Current Conditions
Min
(1)
Lifetime expectancy
Min
—
(2)
MTBF
SN 29500, IEC 61709
—
—
—
(2)
MTBF
MIL HDBK 217F
—
—
(1) The Lifetime expectancy values that are shown in the table indicate the minimum operating hours (service life) and are determined by the
lifetime expectancy of the built-in electrolytic capacitors. 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 h). Any number that exceeds this value is a calculated theoretical lifetime, which can be used to compare devices.
(2) Mean Time Between Failure (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 value is a statistical
representation of the likelihood of a device to fail. An MTBF value of, for example, 1,000,000 h 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 h or only for 100 h.
The terminals are IP20 fingersafe constructed and suitable for field wiring and
factory wiring.
Attributes
Type
Solid wire
Stranded wire
American Wire Gauge
Wire diameter max
Wire stripping length
Screwdriver
Recommended tightening torque
Wiring rules:
•
Use appropriate copper cables that are designed for minimum operating
temperatures of:
- 75 °C (167 °F) for ambient up to 55 °C (131 °F)
- 90 °C (194 °F) for ambient up to 70 °C (158 °F)
•
Follow national installation codes and installation regulations.
•
Ensure that all strands of a stranded wire enter the terminal connection.
•
Unused terminal compartments should be securely tightened.
•
Ferrules are allowed.
Rockwell Automation Publication 1606-RM111A-EN-P - July 2020
N+1 Redundancy
1+1 Redundancy
Input: 2 x 10 A
Input: 2 x 5 A
Output: 20 A
Output: 10 A
309,000 h
113,000 h
320,000 h
874,000 h
7,837,000 h
20,310,000 h
19,408,000 h
46,382,000 h
1,774,000 h
1,817,000 h
2,709,000 h
2,782,000 h
3,675,000 h
3,707,000 h
5,620,000 h
5,674,000 h
Values and Descriptions
screw terminals
2
6 mm
max
2
4 mm
max
AWG20...10
2.8 mm (0.110 in.) (including ferrules)
7 mm (0.28 in.)
3.5 mm (0.138 in.) slotted or cross-head No 2
1 N•m, 9 lb•in
Notes
at 24V and 40 °C (104 °F)
at 24V and 25 °C (77 °F)
at 24V 40 °C (104 °F)
at 24V 25 °C (77 °F)
at 24V and 40 °C (104 °F) (Ground Fixed GF40)
at 24V and 25 °C (77 °F) (Ground Fixed GF25)
at 24V and 40 °C (104 °F) (Ground Benign GB40)
at 24V and 25 °C (77 °F) (Ground Benign GB25)
Advertisement
Table of Contents
