Delta AH02HC-5A, Hardware Manual

Page: 138 / 229

AH500 Hardware Manual
3. The TRIAC output
Load through which the
alternating current flows
5.5.2.2 Relay Output Circuit
Relay terminals have no polarity. They can be applied to alternating current which passes through a
load, or direct current which passes through a load. The maximum current which can passes
through every relay terminal is 2 A, and the maximum current which can passes through every
common terminal is 5 A. The lifetime of a relay terminal varies with the working voltage, the load
type (the power factor cos
ψ
), and the current passing through the terminal. The relation is shown in
the life cycle curve below.
Contact Current(A)
20
0.5 0.1 0.2
30
50
0.3 0.7 1 2
200
300
500
100
1000
2000
3000
O
p
e
ra
ti
o
n
(X
1
0
)
3
120VAC Resistive
30VDC Inductive(t=7ms)
240VAC Inductive(cos 0.4)
ψ
=
120VAC Inductive(cos =0.4)
ψ
30VDC
Inductive
(t=40ms)

The relay output circuit
① Direct-current power supply
②
Emergency stop: An external switch is used.
③
Fuse: To protect the output circuit, a fuse having a breaking capacity within the range
between 5 A and 10 A is connected to the common terminal.
④
Alternating-current power supply
5-25