Product Details
Product Description
Product Description
Focus on DCS, PLC, robot control system and large servo system.
Main products: various modules / cards, controllers, touch screens, servo drivers.
Advantages: supply of imported original products, professional production parts,
Fast delivery, accurate delivery time,
The main brands include ABB Bailey, Ge / fuanc, Foxboro, Invensys Triconex, Bently, A-B Rockwell, Emerson, ovation, Motorola, xyvom, Honeywell, Rexroth, KUKA, Ni, Deif, Yokogawa, Woodward, Ryan, Schneider, Yaskawa, Moog, prosoft and other brands
Install the fan so that it sits in the cooler area and will blow cold air against the operator panel. If the fan is mounted at the top and sucks air upwards, the fan’s ambient temperature will be higher = shorter lifespan. A good fan with a ball-bearing mounting has an expected lifespan of at least 40,000 hours (not a guaranteed lifespan) at 40 °C. This corresponds to at least 4 years of continuous use. If a thermostat is installed, the fan only needs to come on when needed. Large graphic terminals draw only one fifth of the current when the background lighting is off. The loss effect drops from e.g. 25 W to only 5 W. The operator panel’s loss effect = supply voltage x current. Virtually no power goes to external users and no loss effects due to inputs. Safety Section 7 Additional Installation Tips 48 3BSE043446R501 Safety Most of the operator panels are fed with 24 V DC. 1. If you use a power supply that meets safety standards and only feeds the operator panel, there is no problem. 2. However, if you have a 24 V unit that also feeds other units, there is reason to be cautious. The operator panel does not have insulation that meets safety requirements in the event of a potential short circuit between 230 V AC and 24 V DC. It is 4 1 2 4 3 4 5355 Power supply 230 V AC to 24 V DC Power supply 230 V AC to 24 V DC Power supply 230 V AC to 24 V DC Operator panel Operator panel Operator panel +24 V +24 V +24 V 0 V 0 V 0 V 230 V AC COM1 COM100 Small controller with expansion unit Ch0 Ch1 Ch100 Ch101 Distance? Section 7 Additional Installation Tips Safety 3BSE043446R501 49 assumed that the 24 V feed is secure, for example, SELV according to EN 60950 (protection against electric shock) and UL 950. 3. If there is a substantial distance between the relay contacts for 24 V DC and 230 V AC, it is OK to use the same 24 V devices for all feeds. 4. Connect 0 V on the 24 V feed to the ground. This offers three advantages: – Safety is increased. The 24 V feed will not be live in the event of a faulty connection or short circuit between 0 V (24 V) and 230 V phase. – Transients on the 24 V feed are connected to the ground. – No risk that the 24 V feed is at a high level in relationship to the ground. This is not unusual since there is high static electricity. Here is an example that explains why a secure 24 V DC feed can be ruined by mixing 24 V relay contacts with 230 V AC relay contacts in a smaller controller. Check that the “clearances and creepage distances between 24 V DC and 230 V AC fulfill EN 60950 or UL 950”. If not, input a separate 24 V unit into the operator pane
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