PSR45A-275
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The PSR45A-275 power supply supports a main AC line input voltage of 90-160 VAC, a peak current of 24.0 amps for 3-phase systems, and internal heat dissipation of 120 watts. Designed under the PSR Servo Power Supplies series by Kollmorgen, it operates at frequencies of 47-63 Hz and features a nominal DC bus output of 160 VDC.
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Product Description:
The Kollmorgen’s PSR45A-275 servo power supply is engineered for powering automation and motion control systems. It delivers a stable DC output essential for servo machinery and is configured for three-phase AC power systems. The PSR45A power supply is integrated with a Schaffner Model No. 258-75/34 filter to support clean and interference free power operation.
The PSR45A-275 power supply has operating input voltage range of 90 to 280 VAC and the output is rated at 310 VDC with a maximum of 75 A DC for multiple servo axes. The terminal torque for main power and bus connections is specified at 20 inch-pounds to match the torque required for the grounding studs for ensuring secure electrical bonding and safety compliance. The PSR45A power supply supports both RS-232 and RS-485 communication interfaces for seamless integration with modern control systems. It can be connected up to six BDS4 or BDS5 servo drives. The PSR45A power supply’s recommended UL-rated time delay fuse for the main power input to ensure reliable overcurrent protection is BUSS FRN-R series. The PSR45A power supply is attachable with 22–18-gauge wire sizes for signal and control and 16-gauge wire for power connections.
The PSR45A-275 power supply has a front panel that includes clear indicators for DC bus, regen and fault statuses while the terminals can be connected to an external regeneration resistor for power dissipation. A residual voltage protection system is built-in that requires a 5-minute wait after power removal. For optimal electrical connections with PSR45A power supply, 600 V AC insulated copper wires are recommended to have a minimum wire gauge of 8 for the power bus.
Frequently Asked Questions about PSR45A-275:
Q: Why does the PSR45A-275 use both RS-232 and RS-485 interfaces?
A: RS-232 provides point-to-point communication, while RS-485 allows for multi-drop configurations—ideal for complex automation setups using the PSR45A-275.
Q: What is the function of the Schaffner 258-75/34 filter in PSR45A-275?
A: It suppresses electromagnetic interference (EMI), ensuring clean power delivery and reduced signal disruption in sensitive automation environments.
Q: Why is a 5-minute wait required after power removal on PSR45A-275?
A: The residual voltage protection ensures stored energy in the DC bus discharges safely, preventing accidental shocks during maintenance.
Q: Why are 600 V AC insulated copper wires recommended for PSR45A-275?
A: These wires provide insulation integrity and current-carrying capacity necessary for the PSR45A-275’s high-power output and safety standards.
Q: What advantage does the 20 in-lb terminal torque provide on the PSR45A-275?
A: This ensures secure electrical bonding and reduces the risk of terminal loosening from vibration in motion systems.
