Chino AL3000 SERIES, Instructions Manual

Page: 21 / 116

4-6
3. Cautions on connections
Be careful with the following remarks and references on connections.
Maximum voltage----240V (AC, DC)
Maximum current----50mA (AC, DC) *
*Irrespective of load types
Power
supply Resistive
load
Inductive
load
100V AC 0.5A 0.2A
240V AC 0.2A 0.1A
100V DC 0.3A 0.1A
*'a' contact and 'c' contact common
･
Mount a contact protective element
conforming to the buffer relay.
MOS relay is broken, if a signal exceeding
the contact rating is applied even if
momentarily.
･
Mounting of the element on the coil side of
the buffer relay ('a' in the left figure) is
effective for preventing a wrong operation
due to a light load.
1) Coil rating-------Less than the contact rating
of output terminals
2) Contact rating--More than twice the load
current
A coil surge absorption element built-in type
relay is recommendable. Mount a buffer relay
of an additional stage if a buffer relay
satisfying the load rating is not available.
Mount a contact protective element if a surge
absorption element built-in buffer relay is not
available.
This element is generally composed of C
(capacitor) and R (resistor).
<Reference values of C and R>
C: 0.0l μ V (Rating about 1kV)
R: 100 to 150 Ω (Rating about 1W)
Contact rating of MOS relay output
Remarks 1
Contact rating of mechanical
relay output*
Remarks 2
Mounting of contact protective
element Z
Remarks 3
Selection of contact
protective element
Reference 2
Selection of buffer relay
Reference 1