ABB | PSTX
Product overview
The ABB PSTX37-600-70 softstarter is rated 37A IEC and 18.5kW at 400V for normal in-line starting duty. It operates on a three-phase 208-600V AC supply with 100-250V AC control power and built-in bypass. ABB ordering reference: 1SFA898104R7000.
Key features
- Torque control for pump starting and stopping
- Built-in bypass, graphical detachable keypad and electronic motor protection
- Built-in Modbus RTU; optional protocol-specific Anybus modules
Technical selection summary
| Complete model | PSTX37-600-70 |
|---|---|
| ABB order code | 1SFA898104R7000 |
| IEC rated operational current, in-line | 37A |
| Motor power at 400V, normal start | 18.5kW |
| Main supply | Three-phase 208-600V AC, 50/60Hz |
| Control supply | 100-250V AC, 50/60Hz |
| Bypass | Built-in |
| Starting method | Three-phase voltage or torque ramp |
| Motor protection | Electronic overload, class 10A/10/20/30; configurable protection functions |
| Built-in communication | Modbus RTU, RS485 |
| Keypad | Detachable graphical keypad; IP66 keypad rating |
| Signal outputs | 3 programmable signal relays; analogue output |
| Starting capacity | 4 x Ie for 10 seconds |
| Normal starting duty | Class 10; in-line ratings shown |
| Connection | In-line or inside-delta; select motor using connection-specific catalogue ratings |
| Main terminals | Cable clamps included |
| Degree of protection | Main circuit IP00; supply/control circuit IP20 |
| Ambient temperature | -25 to +60°C; derate above +40°C |
| Dimensions | See matching size drawing in the original ABB catalogue below |
The displayed current and kW are IEC normal-start, in-line ratings. Inside-delta, heavy-duty and UL ratings differ. Supply the correct upstream short-circuit protection. The keypad IP66 rating does not apply to the complete open softstarter.
Accessories and installation
Modbus RTU is built in. Optional Anybus protocol modules plug into the communication interface; choose one protocol module. The USB cable is a separate accessory. Terminal enlargement selection supplies six individual pieces per softstarter.
| Communication Module | AB-PROFIBUS-1 — 1SFA899300R1001; AB-DEVICENET-1 — 1SFA899300R1002; AB-BACNET-IP-2 — 1SFA899300R1004; AB-ETHERNET-IP-2 — 1SFA899300R1006; AB-MODBUS-TCP-2 — 1SFA899300R1008; AB-PROFINET-IO-2 — 1SFA899300R1010; AB-BACNET-MSTP-1 — 1SFA899300R1011; AB-ETHERCAT-IP-2 — 1SFA899300R1012 |
|---|---|
| USB Cable | PSCA-1 — 1SFA899314R1001 |
| Terminal Enlargement | LW110 — 6 × 1SFN074307R1000 |
Typical applications
- Pump starting and stopping with reduced water hammer
- Fan, compressor, conveyor and industrial motor control
ABB PSTX complete reference catalogue PDF
Product reference images and drawings
Original ABB catalogue pages retain headings, illustrations and technical footnotes. The technical summary above applies to the exact product on this page; reference pages also include other sizes.
