1790D-T8A0 – 120V AC 8 Input Base & Expansion Module
Brand: Allen‑Bradley | Series: Compact™ 1790 | Type: Digital Input Module
This 8‑point nonisolated input module accepts 120V AC signals. It offers fast response, clear status indication, and reliable photocoupler isolation for I/O logic. Ideal for PLC expansion in industrial automation systems.
Key Features
- 8 inputs per module, nonisolated
- On‑state voltage: 85..132V AC (nom. 110V AC)
- Input impedance: 18 kΩ
- On‑state current: 9 mA max @ 132V AC
- Off‑state voltage: 45V AC max
- Signal delay: Off→On 10 ms, On→Off 30 ms
- Status LEDs: 8 green indicators
- Common type: 8 points / 8 COM
General Specifications
- DeviceNet power: 24V DC nom (11..28.8V DC)
- Power dissipation (base): 1.2 W max @ 28.8V DC
- External AC supply: 110V rms, 60 Hz (85..132V rms, 47..63 Hz)
- External power dissipation: 3 W @ 132V AC
- Isolation: I/O to logic via photocoupler, 1250V AC rms
- Field power: non‑isolated
- Wiring: Terminal block M3.0, torque 7 lb‑in (copper or copper‑clad Al)
- Fusing: 1 A, 250V normal blow (recommended)
Technical Data (Detailed)
| Parameter | Value / Range |
| Measurement range | 85..132V AC (on‑state) |
| Frequency response | 47..63 Hz |
| Sensitivity | 9 mA @ 132V AC (typical) |
| Linearity | Digital (on/off) with fixed thresholds |
| Resolution | 1 bit per input |
| Temperature range | 0..60°C (operation), -40..85°C (storage) |
| Environmental tolerance | Relative humidity 5..95% (non‑condensing) |
| Immunity (ESD / EFT) | Meets IEC 61000‑4‑2, -4‑4 |
Installation & Commissioning
- Mounting: DIN‑rail or panel mount (base module).
- Wiring: Use M3.0 screws; torque to 7 lb‑in max.
- Commissioning: Check LED status; verify on‑state voltage ≥85V AC.
- Maintenance: Periodic inspection of terminal torque; no calibration needed.
- Compatibility: Works with 1790 series base & expansion units.
Diagnostics & FAQ
- Diagnostic LED: Green per input – ON indicates valid AC signal.
- Fault detection: Off‑state voltage >45V AC triggers warning.
- Q: Can I mix AC/DC inputs? A: No – only 120V AC.
- Q: What fuse rating? A: 1 A, 250V normal blow.
- Q: Is field power isolated? A: No, field power is non‑isolated.
Certifications & Logistics
- Certifications: CE, UL (pending), RoHS compliant.
- Packaging: Anti‑static bag, with terminal block and manual.
- Warranty: 12 months from invoice date.
- Shipping: FedEx, UPS, DHL – worldwide express.
- Typical applications: Conveyor systems, HVAC, pump control, lighting panels.
Why Buy From Oiltech Controls?
- Over 15 years in industrial automation spare parts.
- Global shipment with tracking.
- Tested surplus / refurbished options available.
- 12‑month warranty on all products.
- Each unit verified technically before shipment.
- Support for obsolete control systems.
Contact:
info@oiltechcontrols.com |
+86 158 8020 0923 (WhatsApp)
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