6435-017-N-N Driver Supply

Description

6435-017-N-N Driver Supply

6435-017-N-N Driver Supply

Enable Sense Control

The polarity of the enable input can be changed using Jumper J6 position 5-6. With the jumper removed (factory default), the drive is enabled when the enable input is not driven and disabled when driven (current flows in enable opto). This allows the 6435-017-N-N to be used with no connection to the enable input. With the J6 5-6 jumper installed, the enable input must be driven (current in opto) for the 6435-017-N-N power stage to be enabled.

A digital filter can be enabled which reduces susceptibility to noise on the step input at the expense of a lower limit on maximum step frequency. With Jumper J6 positions 1-2 installed (factory default) the filter is enabled and step pulses must have a minimum width of one microsecond. Pulses less than 0.5 microseconds in width will be rejected. With the filter disabled, Jumper J6 position 1-2 removed, step pulses must be a minimum of 0.25 microseconds wide. Therefore, the maximum step frequency is 500 KHz with the filter enabled and 2 MHz with the filter disabled.

The 6435-017-N-N has an “enabled” output which is on when the drive is enabled and off when the drive is disabled or faulted due to any of the following:

• Output overcurrent (line-to-line or line-to-neutral short)

• Bus overvoltage

• Low voltage supply out of tolerance.

Comparison of typical systems
By using a fieldbus, users can significantly reduce field wiring, achieve multivariable communication with a single field instrument, and fully interoperate between devices produced by different manufacturers, adding on-site control functions, greatly simplifying system integration, and making maintenance very easy. The author has not yet calculated how much cable can be saved by using a fieldbus control system. However, we cannot use the kilometers of cables used in power plants with DCS systems related to automatic control systems to determine the proportion of cables in infrastructure investment.

A certain power plant, 2 × 300MW coal-fired unit. The thermal system is a unit system. Each unit is equipped with a centralized control building, which adopts the centralized control method of machine, furnace, and electrical units. The elevation of the unit control room is 12.6 meters, which is consistent with the elevation of the operating floor. DCS adopts WDPF-II, and each unit is designed with 4500 I/O points. The cable laying adopts EC software, and 8 people complete the design task of cable laying in 1.5 months. The number of cables for the automation discipline of each 300MW unit in the main factory building is 4038. The cable length for the automation specialty of each 300MW unit in the main factory building is 350 kilometers. The number and length of the above cables do not include the factory supplied cables for fire alarms in the entire factory and the cables for auxiliary production workshops in the entire factory. The columns, trays, and small trough boxes of the cable tray are all made of steel galvanized, with each unit weighing approximately 95 tons. Other cable trays, including straight, curved, three-way, four-way, cover plate, terminal head, width adjustment piece, and direct piece, are made of aluminum alloy material, with each 300MW unit weighing approximately 55 tons. Accessories are provided with the bridge (such as bolts and nuts). A certain power plant, 4 × MW fuel and gas power plant. The thermal system is a unit system.

DCS adopts TELEPERM-XP. Each unit is designed with 5804 I/O points. The cable laying adopts EC software, and 12 people complete the design task of cable laying in 2.5 months. The number of cables for the automation discipline of each 325MW unit in the main factory building is 4413. The cable length for the automation specialty of each 235MW unit in the main factory building is 360 kilometers. Each unit is equipped with steel galvanized cable trays, which weigh approximately 200 tons. The cables of power stations can be divided into six categories: high-voltage power cables, low-voltage power cables, control cables, thermal control cables, weak current cables (mainly referring to computer cables), and other cables. If two 300MW units are simultaneously laid with cables, the number of automation cables is approximately 8500. Among them, there will be more than 5000 thermal control cables and weak current cables, accounting for about 60% (measured by the number of cables).

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