Configured for power conversion and distribution in Symphony Plus Harmony Rack I/O systems, the ABB SPGU240A1 (SPGU240 Power Supply Module) provides direct physical/electrical execution.
| Parameter | Specification |
|---|---|
| Model | SPGU240A1 |
| Brand | ABB |
| Origin | Switzerland |
| Weight | 0.4 kg |
| Dimensions | 30.5 cm x 17.8 cm x 2.5 cm |
| Operating Temp | 0 deg C to +60 deg C |
| Power Consumption | Input: 100-240 VAC (Auto-ranging), 50/60 Hz; Output: 24 VDC, 5 A (Nominal) |
| Efficiency | >85% typical at full load |
| Isolation | Galvanic isolation between primary and secondary circuits |
| Protection | Short-circuit, overload, overvoltage, and thermal shutdown |
| Compatibility | Symphony Plus, Harmony Rack I/O (S+ HR) |
The module delivers power directly to the Harmony Rack backplane to support variable I/O density scaling configurations. It maintains stable voltage rails for low-power I/O channels and high-load communication cards without causing voltage sags on adjacent nodes. By stabilizing current delivery on the backplane, the unit prevents data frame dropouts on internal bus lines and ensures uninterrupted deterministic communications across the node.
Q: Can this power supply module be replaced while the Harmony Rack backplane is active?
A: Yes, the module supports online hot-swapping under powered conditions. The backplane-side connection sequence ensures that ground contacts mate first and break last to prevent transient voltage spikes on the 24 VDC bus during insertion.
Q: How does the internal thermal protection circuit react when the local temperature exceeds limits?
A: When internal junction temperatures exceed design safety thresholds, the thermal shutdown circuit halts switching regulator activity, cutting the 24 VDC output. The module recovers automatically once temperatures drop within the specified operating range.
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