Products Specifications
| Attribute | 1794-IB8 |
|---|---|
| Recommended terminal base unit | 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK, 1794-TBKD |
| Terminal base screw torque | Determined by the installed terminal base |
| Keyswitch position | 2 |
| Indicators (field-side indication) | 8 yellow status indicators |
| External DC power supply voltage range | 10…31.2 V DC (includes 5% AC ripple) |
| Wiring category | Category 2 – on signal ports |
| Wire size | Determined by the installed terminal base |
| Dimensions (H × W × D) | 94 × 94 × 69 mm (3.7 × 3.7 × 2.7 in.) |
| Weight (approx.) | 71 g (2.50 oz.) |
| Enclosure type rating | None (open-style) |
| IECEx temperature code | T3 |
The Allen-Bradley 1794-IB8 is a FLEX I/O digital DC input module designed for seamless integration between field devices and the I/O bus through a terminal base. Because the field wiring remains on the terminal base, the module itself can be safely installed or removed while the system is powered, minimizing downtime and eliminating the need for system restarts. This hot-swap capability, combined with its modular design, makes the 1794-IB8 a practical and cost-efficient solution for distributed I/O applications.
The module provides eight current-sinking input channels with a nominal operating voltage of 24V DC and a wide on-state input range of 10 to 31.2V DC. It requires a minimum off-state current of 1.5 mA and dissipates up to 3.5 W at the maximum input voltage. Compatible terminal bases include the 1794-TB3 and 1794-TB3S, and installation is supported on standard DIN rails. The 1794-IB8 supports multiple network platforms, including ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O. Status and diagnostics are aided by channel-specific yellow LEDs, while optional D and XT variants extend functionality for enhanced diagnostics and harsh industrial environments.
Contact Information
Our address
32D floor, Guomao Building, No.388, Hubin South Road, Siming District, Xiamen
Phone Number(Wechat/Whatspp)
+ 86 18030132586
cn@mooreplc.com
Installation Guide
Connect Wiring for 1794-IB8 and 1794-IB16
1. Connect individual input wiring to the numbered terminals on the 0…15 row (A)
2. Connect the associated +V DC power lead of the input device to the corresponding terminal on the 34…51 row (C) for each input. The +V power terminals of row (C) are internally connected together.
3. Connect the associated input common (3-wire devices only) to the corresponding terminal on the 16…33 row (B) for each input. Commons are internally connected together.
4. Connect +V DC power to terminal 34 on the 34…51 row (C).
5. Connect DC common to terminal 16 on the 16…33 row (B).
6. If daisy chaining power to the next terminal base, connect a jumper from terminal 51 (+V DC) on this base unit to terminal 34 on the next base unit.
7. If continuing DC common to the next terminal base, connect a jumper from terminal 33 (common) on this base unit to terminal 16 on the next base unit.
FAQ
Compatible bases include 1794-TB3, TB3S, TB3K, TB3SK, and TBKD terminal base units.
The module operates within 10…31.2V DC, including 5% AC ripple.
Yes, each of the eight input channels has a yellow status LED for real-time monitoring.
Ensure correct terminal base selection, proper grounding, and adherence to wiring category 2 requirements.
The 1794-IB8 is used to receive 24V DC digital signals from field devices such as sensors, switches, and push buttons.
Recommendations
| 560PSU01 | EI803F |
| 560CMU05 | JSMD-03SD |
| SMP16-CPU055 | JSMD-03 |
| SMP16-COM291 | SDD-M-20A4K00-1-23 |
| SMP16-CTR356 | VIB MFS 168 |
| SMP16-SFT304 | REOVIB MFS 268UL |
| SMP16-COM224LB | REOVIB MFS 168 |
| SMP16-EA219 | REOVIB MFS268XL |
| SMP26-SV330 | 3BDH0000021 |
| SMP16-COM201 | 3BDH000002R1 |
Hot Tags: allen bradley 1794-ib8 digital input module, China allen bradley 1794-ib8 digital input module manufacturers, suppliers, 1771-P5, 1746 OA16 pdf, allen bradley, Allen Bradley 1746 OA16, 1746 OA16 manual, Allen Bradley 1746 OA16 Output Module PLC Module
