Omron C200HE-CPU11 Installation Manual page 148

Specifications
Life Expectancy of Contact Output Unit
The C200H-OC221/222/223/224/225 Contact Output Unit uses OMRON's G6B-1174P-FD-US Relay. The life of
the G6B-1174P-FD-US Relay varies with the contact current and ambient temperature. Refer to the following
graphs to calculate this value, and be sure to replace the Relays before their service life expires.
Contact Current vs. Life Expectancy
Conditions
Switching frequency: 1,800 times/hour max.
Ambient temperature: 23°C
30 VDC, L/R = 40 ms
OMRON's H3BA
(electromagnetic valve)
Timer (200 VAC)
OMRON's MA415A
Contactor (200 VAC)
OMRON's
MY4 Relay
(200 VAC)
Contact current (normal current) (A)
Note 1. If the Contact Output Unit is panel-mounted, the temperature inside the panel represents the ambient
temperature.
2. The life of the Relay at an ambient temperature of 55°C is one-fifth the life of the Relay at room tempera-
ture (0° to 40°C).
Inductive Load
The life of the Relay varies with the load inductance. If any inductive load is connected to the Contact Output Unit,
use an arc killer with the Contact Output Unit using an inductive load.
Be sure to connect a diode in parallel with every DC inductive load that is connected to the Contact Output Unit.
Contact Protection Circuit
Arc killers are used with the Contact Output Unit in order to prolong the life of each Relay mounted to the Contact
Output Unit, prevent noise, and reduce the generation of carbide and nitrate deposits. Arc killers can, however,
reduce relay life if not use correctly.
Note Arc killers used with the Contact Output Unit can delay the resetting time required by each Relay mounted to
the Contact Output Unit.
136
250 VAC, cosφ = 0.4
30 VDC, L/R = 7 ms
(HK, MM, and MY
Hinge-type Relay)
250 VAC, cosφ =
130 VDC, L/R = 0
Electromagnetic
valve (250 VAC,
cosφ = 0.08 to
0.1)
Ambient Temperature vs. Life
Expectancy
Conditions
Switching frequency: 1,800 times/hour max.
2 A at 250 VAC, resistive load
2 A at 30 VDC, resistive load
1 A at 250 VAC, inductive load
(cosφ = 0.4)
1 A at 30 VDC, inductive load
(L/R = 7 ms)
2 A at 250 VAC, inductive
load (cosφ = 0.4)
2 A at 30 VDC, inductive
load (L/R = 7 ms)
Ambient temperature (°C)
Appendix B
1 A at 250 VAC,
resistive load
1 A at 30 VDC,
resistive load