Description
Key Technical Specifications
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Model Number: 48980001-AGDSSB170
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Manufacturer: ABB (Sweden)
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Nominal Voltage: 48 VDC
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Battery Chemistry: Lithium-ion (LiFePO₄ variant common)
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Rated Capacity: 140 Ah @ 25 °C
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Peak Discharge: 200 A for 10 ms, 80 A for 1 s
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Re-charge Time: 2 h to 90 % with 30 A on-board charger
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Efficiency: > 92 % round-trip
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Isolation: 2 kV DC battery-to-logic
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Operating Temperature: –20 °C…+60 °C (derate > 45 °C)
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Mounting: 6U DIN-rail chassis, 9 kg
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Indicators: LED bar (SOC), relay “Battery-Fail”, “Ready”
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Communication: RS-485 Modbus RTU for SOC & temp
ABB 48980001-AGDSSB170
Field Application & Problem Solved
Gas-compressor skids in West Texas lose their 48 V logic every time the generator auto-starts. A 2-second blackout is long enough to drop the AC 800F CPU and trip the whole reciprocating engine. Drop in the DSSB-170, wire it across the existing 48 V supply, and you buy 15 minutes of hold-up—long enough for the gen-set to ramp, sync, and re-close. Same trick works on offshore platforms that switch between turbine and shore-power; the reservoir keeps the I/O alive so you don’t lose valve positions or cause a process spike. Core value: it’s a bolt-in UPS without the inverter losses; you get 92 % efficiency and no fan filters to clog with salt or dust.
Gas-compressor skids in West Texas lose their 48 V logic every time the generator auto-starts. A 2-second blackout is long enough to drop the AC 800F CPU and trip the whole reciprocating engine. Drop in the DSSB-170, wire it across the existing 48 V supply, and you buy 15 minutes of hold-up—long enough for the gen-set to ramp, sync, and re-close. Same trick works on offshore platforms that switch between turbine and shore-power; the reservoir keeps the I/O alive so you don’t lose valve positions or cause a process spike. Core value: it’s a bolt-in UPS without the inverter losses; you get 92 % efficiency and no fan filters to clog with salt or dust.
Installation & Maintenance Pitfalls (Expert Tips)
Reverse Polarity = Instant Fuse – Battery cable is color-coded but the spring-clamp label is tiny. Reverse 48 V blows an internal 125 A semiconductor fuse; replacement means pulling the module and shipping it back.
Charger DIP Switches Wrong – Factory default is 27 A. If your supply is only a 25 A breaker it will nuisance trip on every recharge cycle. Dial the switch pack down to 18 A and live with a 3-hour recharge.
Temperature Sensor Unplugged – The BMS shuts down at 65 °C cell temp. Techs leave the sensor cable off after swap-out; the unit reads –40 °C and never charges. Always verify “Temp” in Modbus register 40108 before you leave site.
Ignore the 5-Year Calendar Life – Li-ion loses 20 % capacity per year above 35 °C. In a south-Texas motor-control house that means you get three summers, not five. Put a replacement PO in the CMMS at year 3 or you’ll discover the weakness during the next lightning storm.
Reverse Polarity = Instant Fuse – Battery cable is color-coded but the spring-clamp label is tiny. Reverse 48 V blows an internal 125 A semiconductor fuse; replacement means pulling the module and shipping it back.
Charger DIP Switches Wrong – Factory default is 27 A. If your supply is only a 25 A breaker it will nuisance trip on every recharge cycle. Dial the switch pack down to 18 A and live with a 3-hour recharge.
Temperature Sensor Unplugged – The BMS shuts down at 65 °C cell temp. Techs leave the sensor cable off after swap-out; the unit reads –40 °C and never charges. Always verify “Temp” in Modbus register 40108 before you leave site.
Ignore the 5-Year Calendar Life – Li-ion loses 20 % capacity per year above 35 °C. In a south-Texas motor-control house that means you get three summers, not five. Put a replacement PO in the CMMS at year 3 or you’ll discover the weakness during the next lightning storm.
ABB 48980001-AGDSSB170
Technical Deep Dive & Overview
Internally the DSSB-170 is a 15-cell LiFePO₄ stack, a 200 A MOSFET half-bridge for bidirectional DC/DC, and an ARM-based BMS that balances every cell through a 100 mA bypass. The DC/DC stage sits between your 48 V plant bus and the battery; during normal operation it runs as a buck charger, then flips to boost the moment bus voltage collapses below 42 V. Switch-over is < 250 µs so the AC 800F CPU never sees a dip. The BMS reports SOC, current, and cell temp over Modbus RTU; you can poll it from the SCADA and alarm at 20 % SOC to force a recharge before the next outage. No cooling fan—heat sinks are bonded to the DIN-rail plate, so keep 100 mm free air above or it will throttle current at 55 °C.
Internally the DSSB-170 is a 15-cell LiFePO₄ stack, a 200 A MOSFET half-bridge for bidirectional DC/DC, and an ARM-based BMS that balances every cell through a 100 mA bypass. The DC/DC stage sits between your 48 V plant bus and the battery; during normal operation it runs as a buck charger, then flips to boost the moment bus voltage collapses below 42 V. Switch-over is < 250 µs so the AC 800F CPU never sees a dip. The BMS reports SOC, current, and cell temp over Modbus RTU; you can poll it from the SCADA and alarm at 20 % SOC to force a recharge before the next outage. No cooling fan—heat sinks are bonded to the DIN-rail plate, so keep 100 mm free air above or it will throttle current at 55 °C.
