The ABB 560PSU81 (1KGT008700R0001) is a high-reliability power supply module designed for the RTU560 remote terminal unit series. This model provides the stabilized internal voltages required by the communication units (CMUs) and I/O modules within an RTU560 subrack, featuring a wide-range DC input suitable for utility and substation battery systems.
Technical Specifications
| Feature | Details |
| Model Number | 560PSU81 / 1KGT008700R0001 |
| Input Voltage | 24 V to 60 V DC (-20% / +15%) |
| Output Voltages | 5 V DC / 24 V DC (Internal Bus) |
| Output Power | 30 Watts |
| Efficiency | > 75% |
| Country of Origin | Germany |
| Dimensions (WxHxD) | 40 x 125 x 85 mm (8 Pole Units) |
| Weight | Approx. 0.35 kg |
Operational Precautions
- Input Polarity: Ensure the DC input wiring matches the polarity marked on the subrack terminals; while protected, reversed polarity can prevent the RTU from initializing.
- Redundancy Configuration: For critical sites, two 560PSU81 units can be installed in a redundant subrack to provide parallel power sharing and bumpless failover.
- Fusing: Always use an external fast-acting fuse or miniature circuit breaker (MCB) on the DC supply line to protect the module from external cable faults.
- Thermal Clearance: Maintain adequate airflow around the RTU rack; if the 560PSU81 “ALARM” LED illuminates, check for an over-temperature condition or an internal bus overload.
Common Q&A
Q: Can this module power an entire RTU560 rack? A: Yes, a single 560PSU81 provides 30W, which is typically sufficient for one CMU and several I/O modules. For very high-density racks, a second PSU may be required.
Q: Does it provide diagnostic information to the SCADA? A: Yes, the module monitors its own output voltages and provides a “Power OK” status to the CMU via the internal system bus for remote monitoring.
Q: Is it compatible with both 24V and 48V battery systems? A: Yes, its wide input range (24V–60V DC) makes it natively compatible with standard industrial battery voltages without the need for hardware jumpers.
Recommended Similar Models
- 560PSU40: A related power supply variant with a higher input voltage range (up to 220V DC).
- 560MPR03: The standard multi-processor rack used to house the PSU and CMU modules.
- 560CMU05: The main communication unit frequently powered by the 560PSU81.
- 23BE23: A binary I/O module that draws power from this PSU via the backplane.
- 560ETH01: An Ethernet expansion module for the RTU560 platform.
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