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Hardware
3ADW000197R0101 DCS800-R Sel e a
The following results from this configuration:
- A thyristor receives firing pulses when it has been addressed by one of the sig-
nals A to F and by one of the current direction signals SR_Xxxx.
- All members of one group have always to be assigned to the same current di-
rection but not necessarily to the same bridge.
There are four horizontal groups of rows assigned to the input terminals, and eight
vertical rows assigned to the output terminals. There is one column for the SR_1
and another one for the SR_2 signal, and eight pair of rows for the outgoing
SR_ACE and SR_BDF signals. Penetrations are located in the intersections of
these signals, vertical to horizontal. If a wire is inserted in these penetrations and
soldered on both sides, an input-to-output connection has thus been established.
The multilayer construction used for this board enables this method to be em-
ployed.
Design hints
• Name the AC terminals of the existing power part
• Name all thyristors according to the list above
• Look for a place, where the SDCS-PIN-48 board can be mounted and make
sure, that the distance to the gates of the thyristors does not exceed one me-
ter; the best noise immunity can be achieved with the shortest gate leads
• Assign the thyristors to a firing channel, bearing in mind the group assignments
Signal handling
The handling of the signals, controlling a thyristor is presented by an example:
• Stipulation
- Thyristor Vx26 is to be controlled via plug X32: to plug X813: and via chan-
nel D of SDCS-PIN-48 board
• Evaluation
- Thyristor Vx26 has been assigned to signal 6
- Thyristor Vx26 belongs to current direction 2 (SR_2)
- Channel D has been assigned to group SR_BDF
- Channels B and F are then likewise assigned to current direction 2
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