PST6250.610-L Bosch Rexroth Indramat
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MPN: 1070079349
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The Bosch Rexroth Indramat PST6250.610-L is a 12.5 kilogram thyristor power unit from the PST Thyristor Power Units series. It operates with a nominal system current of 200 Amps, a control supply of 24 V DC at 1.0 Amp, and features an IP20 protection rating. The unit supports DeviceNet for both I/O bus and timer type, has a max transformer rating of 250 kVA, and can store up to 256 programs.
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Product Description:
The PST6250.610-L thyristor power unit is produced by Bosch Rexroth Indramat as part of the PST Thyristor Power Units series. It gates current through paired thyristors to regulate energy delivered to welding transformers and other high-current loads in automated production cells. By controlling the conduction angle, the unit allows a PLC or fieldbus system to command precise heat input, making it a dedicated interface between low-level control logic and high-power machinery.
The control electronics run from 24 V DC, and at that voltage the triggering circuitry draws 1.0 A. When the main contact closes, an inrush of 1.5 A for 10 ms is required, which gives the supply fuse time to respond without nuisance trips. Once energized, the output can conduct a continuous 200 A of system current, making it suitable for medium-size resistance welders connected to transformers up to 250 kVA. To limit thermal stress, the unit is restricted to a maximum duty cycle of 50%. The housing has an IP20 rating and uses forced-air cooling, so it must be installed inside a filtered cabinet.
The integrated DeviceNet I/O bus exchanges setpoints and feedback with a cell controller, while time-based process sequences are stored in up to 256 resident programs that can be edited through the V24/RS232 service port. Overvoltage protection is provided by an MOV network across the mains terminals, and copper lugs up to 95 mm² clamp under the output screws to carry the full line current. Air moving across the heat sink allows the assembly to operate in ambient temperatures up to 55 °C without derating, provided cabinet airflow is maintained. Despite the high current capability, the unit weighs only 12.5 kg, which helps simplify panel installation and allows the chassis to be supported with standard DIN rail brackets.
Frequently Asked Questions about PST6250.610-L:
Q: What control supply voltage is required for the PST6250.610-L power unit?
A: The PST6250.610-L accepts a control supply voltage of 24 V DC.
Q: What type of I/O bus does the PST6250.610-L support?
A: DeviceNet is used as the I/O bus interface on this model.
Q: What is the nominal system current for the PST6250.610-L?
A: The nominal system current for this unit is rated at 200 A.
Q: What is the maximum transformer rating for the PST6250.610-L?
A: The maximum transformer rating supported is 250 kVA.
Q: What is the IP rating for the PST6250.610-L thyristor power unit?
A: This unit operates with an IP20 rating, offering basic ingress protection.
