Delta AS Series Operation Manual page 218

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4.8.2.2 Relay Output Circuit
Relay terminals have no polarity. They can be used with alternating current that passes through a load, or with
direct current that passes through a load. The maximum current that can pass through every relay terminal is 2
A, and refer to each product specification for the maximum current that can pass through every common
terminal. Life cycle curve: The lifetime of a relay terminal varies with the working voltage, the load type (the
power factor cosψ, the time constant t(L/R)), and the current passing through the terminal. The relation is
shown in the life cycle curve below.

Relay output circuit
①
Direct-current power supply
②
Emergency stop using an external switch.
Fuse: to protect the output circuit, a fuse having a breaking capacity between 5 A to 10 A is connected
③
to the common terminal.
④
Alternating-current power supply
120VAC Resistive
3000
30VDC Inductive(t=7ms)
2000
240VAC Inductive(cos
1000
120VAC Inductive(cos =0.4)
500
300
200
100
30VDC
Inductive
50
(t=40ms )
30
20
0.1
0.2 0.3 0.5 0.7
Contact Current(A)
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= 0.4)
ψ
ψ
1 2