User manual

UF20.241
–
U-Series
24V, 20A, 200ms
Dec 2005 / Rev. 1.2 / DS-UF20.241-EN / All parameters are specified at 24V, 20A and 25°C ambient unless otherwise noted.
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12. TERMINALS AND WIRING
Power terminal
Type Bi-stable, quick-connect spring clamp terminals. IP20 Finger safe construction.
Suitable for field- and factory installation. Shipped in open position.
Solid wire 0.5-6mm
2
Stranded wire 0.5-4mm
2
AWG 20-10AWG
Ferrules Allowed, but not required
Pull-out force 10AWG:80N, 12AWG:60N, 14AWG:50N, 16AWG:40N (according to UL486E)
Wire stripping length 10mm / 0.4inch
Fig. 12-1 Connecting a wire
Instructions:
a) Use appropriate copper cables, that are designed
for an operating temperature of 60°C
b) Follow national installation codes and regulations!
c) Ensure that all strands of a stranded wire enter the
terminal connection!
d) Up to two stranded wires with the same cross
section are permitted in one connection point
1. Insert the wire 2. Snap the lever
To disconnect wire: same procedure vice versa
Signal terminal
Type Plug connector with screw terminal mechanism.
Finger-touch-proof terminal with captive screws for 3.5mm slotted screwdriver.
Solid / stranded wire
0.2-2.5mm
2
AWG 22-14AWG
Ferrules
up to 1.5 mm
2
wire gauge
Wire stripping length 6mm / 0.24inch
Tightening torque 0.4Nm, 3.5lb.in
13. RELIABILITY
Lifetime expectancy min. 41 000h 40°C, stand-by mode
min. 116 000h 25°C, stand-by mode
MTBF SN 29500, IEC 61709 2 327 000h 40°C, stand-by mode
4 025 000h 25°C, stand-by mode
MTBF MIL HDBK 217F 398 000h 40°C, stand-by mode, ground benign GB40
545 000h 25°C, stand-by mode, ground benign GB25
The Lifetime expectancy shown in the table indicates the operating hours (service life) and is determined by the
lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours.
Lifetime expectancy is calculated according to the capacitor’s manufacturer specification.
MTBF stands for Mean Time Between Failure, which is calculated according to the statistically 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 a life of a product.