Product details
Allen-Bradley 1790-T8A0X CompactBlock LDX Input Module
1790-T8A0X is a digital expansion module for DeviceNet systems. It supports 120VAC input, 8 points, and simple fixed screw terminals. Made for fast installs in small panels.
Author: Powergear X Automation
Key Operating Data
- Input rating: 120VAC nominal
- Current draw: 10 mA max each channel
- Power usage: 3W at 132VAC
- Input range: 85 to 132VAC
- Off-state level: 45VAC max
- Input delay: 10 ms (Off to On) / 30 ms (On to Off)
- Input impedance: 18 kΩ
- Indicators: 8 green LEDs
- Housing: NEMA Type 1
- Isolation: 1250VAC I/O to logic
Extra Technical Values (Added)
- Noise immunity: 2 kV surge rated typical
- Maximum wiring length: 100m recommended shielded
- Field fuse: 1A / 250VAC normal blow
- Mounting: DIN rail / panel adapter
- Power dissipation limit: 1.2W @ 28.8VDC (DeviceNet supply)
Wiring & Setup
- Terminal type: M3 screw block, 7 lb-in torque
- Wiring type: Copper or copper-clad conductors only
- Setup: Rotary switch or ESD configuration files
- Compatible PLCs: PLC, SLC, Logix, SoftLogix
Logistics & Warranty
- Shipping options: FedEx, UPS, DHL
- Standard warranty: 12 months
- Condition: Tested, cleared, ready to run
Contact & Support
- Email: sales@powergearx.com
- WhatsApp: +86 18030005825
FAQ Section
Q1: Does this module support fast field troubleshooting?
A: Yes. Field users confirm LED indicators help isolate channel issues without full system shutdown.
Q2: Can it run in old cabinets with mixed I/O?
A: Yes. Integrators often mix this device with legacy AC blocks during phased upgrades.
Q3: Does it need shielding for long cable runs?
A: In most industrial plants, shielded cable is preferred to limit noise from motors and VFDs.
Q4: Any common field mistakes?
A: Over-tightening terminals or mixing copper and steel leads can cause unstable connections.
Q5: Best practice for fuse protection?
A: Many technicians install dedicated panel fusing at 1A to avoid nuisance trips and protect input wiring.
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Original Source: https://www.powergearx.com/
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