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SKU:1794-IT8
Allen-Bradley 1794-IT8 | Flex I/O Thermocouple Input 8-Ch
Manufacturer: Allen-Bradley
Product No.: 1794-IT8
Product Type: DC Input Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 250g
Shipping port: Xiamen
Warranty: 12 months
Kongsi
- Penghantaran Pantas
- Sokongan 24/7
- Jaminan Kualiti
Penerangan
Product Overview
The Allen-Bradley 1794-IT8 is an 8-channel Thermocouple/mV Analog Input Module for the Flex I/O system. It supports thermocouple types J, K, E, R, N, S, B, C, T, and L, plus ±76.5mV signals. With 16-bit resolution and 2.384 microvolt typical accuracy, it delivers precise temperature measurement in industrial applications.
Core Functionality
The 1794-IT8 interfaces directly with grounded or ungrounded thermocouples and millivolt transducers. It communicates with PLCs via block transfer programming, moving configuration words and input data between the module and the PLC data table. Two cold-junction compensators mount on the terminal base for accurate reference. The module requires key switch Position 3 on the terminal base for safe mounting.
Technical Specifications
| Parameter | Value |
| Part Number | 1794-IT8 |
| Series | Flex I/O |
| Module Type | Thermocouple/mV Input Module |
| Inputs | 8 channels |
| Thermocouple Types | J, K, E, R, N, S, B, C, T, L |
| Millivolt Range | ±76.5 mV |
| Resolution | 16-bit (2.384 µV typical) |
| Data Format | 16-bit 2's complement or offset binary |
| Isolation Voltage | 850V DC |
| Normal Mode Rejection | -60 dB at 60 Hz |
| Common Mode Rejection | -115 dB at 60 Hz / -100 dB at 50 Hz |
| Channel Bandwidth | 0 to 2.62 Hz |
| System Throughput | 325 ms |
| Flexbus Current | 20 mA |
| Power Dissipation | 3W max @ 31.2V |
| Thermal Dissipation | 10.2 BTU/hr @ 31.2V DC max |
| Terminal Base | 1794-TB2, -TB3, -TB3T |
| Keyswitch Position | 3 |
| CJC Unit Part Number | 969424-0 |
| Weight | Approx. 0.25 kg (0.55 lbs) |
Installation Guide
Rotate the terminal base keyswitch to Position 3 before inserting the 1794-IT8. Mount the two cold-junction compensators (969424-0) in their designated positions on the terminal base. Connect thermocouple or millivolt wiring, observing polarity for ±76.5mV inputs. Configure the module via block transfer programming in the PLC. Ensure 24V DC supply is connected. Supports both grounded and ungrounded thermocouples.
Engineering Advantages
This module supports 10 thermocouple types plus millivolt inputs for maximum application flexibility. 16-bit resolution with 2.384µV typical accuracy ensures precise temperature measurement. -115dB common mode rejection at 60Hz provides excellent noise immunity. 850V DC isolation protects the backplane. The dual cold-junction compensators maintain accurate reference compensation.
Technical FAQs
Q1: Supported thermocouple types and range?
A1: J, K, E, R, N, S, B, C, T, L plus ±76.5mV. Type B: 300-1800°C, Type K: -230 to 1372°C, Type J: -195 to 1200°C.
Q2: What terminal base and keyswitch position?
A2: Compatible with 1794-TB2, -TB3, -TB3T terminal bases. Keyswitch must be in Position 3 for safe mounting.
Q3: Resolution and isolation specs?
A3: 16-bit resolution (2.384µV typical). 850V DC isolation. Throughput 325ms. Flexbus current 20mA.
Spesifikasi Tambahan
Skalar (V/f)
Vektor
Dikuasakan oleh AC
Panduan Membeli
- Sahkan model tepat, nombor bahagian, dan spesifikasi sebelum membuat pesanan.
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- Hubungi melalui sale@etowonauto.com atau +8617859788089 untuk bantuan teknikal.
- Semak pilihan penghantaran, masa penghantaran, dan keperluan penghantaran.
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Penghantaran dan Pemulangan
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Untuk maklumat lanjut, sila semak Polisi Penghantaran & Pengembalian.

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