Image is for illustrative purposes only. Please refer to product description.
- Manufacturer
- Allen-Bradley
- Manufacturer part number
- 1756-ENBT
- Product family
- ControlLogix Communication Modules (1756)
- Technical datasheet
- Data sheet
Specifications
| Attribute | Value |
|---|---|
| Type | EtherNet/IP communication module |
| Manufacturer lifecycle | Discontinued |
| OEM successor | 1756-EN2T |
| Application | EtherNet/IP |
| Communication | Ethernet/IP |
| Display | Digital |
| Enclosure | None (open-style) |
| Mounting | Chassis |
| Sub Brand | ControlLogix |
| Interface | 1 Copper RJ45 (10/100 Mbps) |
| Number Of Channels | 1 |
| ATEX temp code | T4 |
| CIP unconnected messages | 64 + 64 (backplane + Ethernet) |
| Communication rate | 10/100 Mbps |
| Conducted RF immunity | 10V rms with 1 kHz sine-wave 80% AM from 150 kHz...80 MHz |
Show all 39 specificationsShow fewer specifications
| Connections supported, max | TCP: 64, CIP: 128 (CIP connections can be used for all explicit or all implicit applications. for exAle, a 1756-ENBT module has a total of 128 CIP connections that can be used for any combination of connections.) |
|---|---|
| Current draw | 700mA @ 5.1V DC, 3mA @ 24V DC |
| EFT/B immunity | ±2kV @ 5kHz on Ethernet ports |
| Emissions | CISPR 11: Class A |
| Enclosure type rating | None (open-style) |
| ESD immunity | 6 kV contact discharges, 8 kV air discharges |
| Ethernet cable | 802.3 compliant shielded or unshielded twisted pair |
| Ethernet ports | 1 Ethernet RJ45 Category 5 |
| Isolation voltage | 30V (continuous), basic insulation type, Ethernet, network to backplane, Type tested @ 707V DC @ 60s |
| Module location | Chassis based, any slot |
| Operating temperature | 0 °C <Ta <60 °C (32 °F <Ta <140 °F) |
| Power dissipation | 3.7 W |
| Radiated RF immunity | 10V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz, 10V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz, 1V/m with 1 kHz sine wave 80% AM from 2000...2700 MHz |
| Relative humidity | 5...95% noncondensing |
| Shock | Operating: 30 G, Non operating: 50 G |
| Slot width | 1 |
| Storage temperature | -40 °C <Ta <85 °C (-40 °F <Ta <185 °F) |
| Supporting protocol for EtherNet/IP | Yes |
| Supporting protocol for TCP/IP | Yes |
| Surge transient immunity | ±2 kV line-earth (CM) on Ethernet ports |
| Surrounding air temperature, max | 60 °C |
| Thermal dissipation | 12.6 btu/h |
| Vibration | 2 G @ 10...500 Hz |
| Wiring category | 2 - on Ethernet ports |
Description
The Allen-Bradley 1756-ENBT is a ControlLogix communication module, listed by Rockwell Automation as the ControlLogix Enet/IP Comms Module. Rockwell's product data gives one copper RJ45 interface at 10/100 Mbps, support for the EtherNet/IP and TCP/IP protocols, and a maximum of 64 TCP and 128 CIP connections. It is an open-style module with a current draw of 700mA @ 5.1V DC and 3mA @ 24V DC. Rockwell shows its lifecycle status as Discontinued and names the 1756-EN2T as the Functional Replacement.
Application: Communication module
Used with: ControlLogix 1756 chassis
What is the 1756-ENBT used for?
The module connects a ControlLogix chassis to an EtherNet/IP network, carrying explicit and implicit CIP messaging and TCP/IP traffic. Rockwell lists its application as EtherNet/IP. It is fitted in any slot of a ControlLogix chassis.
Key features
- One RJ45 Category 5 Ethernet port
- Communication rate of 10/100 Mbps
- Supports 64 TCP and 128 CIP connections
- Chassis based, fits any slot, one slot wide
- Operating temperature 0 °C to 60 °C
Documents and Resources
OEM successor to 1756-ENBT
1756-EN2T is named by Allen-Bradley as the successor. It is an upgrade, not a like-for-like spare: check wiring, I/O and configuration for your installation before ordering it. Contact sales@timcontrols.com if you need one.
Associated Products
| Image | Product | Description | Stock | View | Add to RFQ |
|---|---|---|---|---|---|
 | 1756-DNBAllen-Bradley | ControlLogix DeviceNet bridge and scanner module | In stock | View | |
 | 1756-EN2FAllen-Bradley | ControlLogix EtherNet/IP module, 100 Mbps multimode fiber | In stock | View | |
 | 1756-EN2TAllen-Bradley | ControlLogix EtherNet/IP communication module, 10/100 Mbps | In stock | View | |
 | 1756-EN2TRAllen-Bradley | ControlLogix EtherNet/IP module, dual port 10/100 Mbps | In stock | View | |
 | 1756-EN2TXTAllen-Bradley | ControlLogix EtherNet/IP module, extended temperature | In stock | View | |
 | 1756-EN3TRAllen-Bradley | ControlLogix EtherNet/IP module, dual port copper | In stock | View | |
 | 1756-EWEBAllen-Bradley | ControlLogix EtherNet/IP web server module, 10/100 Mbps | In stock | View | |
 | 1756-DHRIOAllen-Bradley | ControlLogix DH Plus/RIO Comms Module | In stock | View | |
 | 1756-EN2TPXTAllen-Bradley | ControlLogix EtherNet/IP Module with PRP, XT | In stock | View | |
 | 1756-EN2TRXTAllen-Bradley | ControlLogix Dual-Port EtherNet/IP Module, XT | In stock | View | |
 | 1756-CN2RKAllen-Bradley | ControlLogix Redundant ControlNet Module, Conformal Coated | In stock | View | |
 | 1756-EN4TRAllen-Bradley | CLX ENet/IP 1G CIP Sec Module | In stock | View |
Product Questions
Is the 1756-ENBT discontinued?
Yes. Its manufacturer lifecycle status is Discontinued.
Is there a replacement for the 1756-ENBT?
The 1756-EN2T is named by Allen-Bradley as the successor. It is an upgrade, not a like-for-like spare: check ratings, wiring and configuration before ordering it in its place.
Do you ship worldwide?
Yes. TimControls ships worldwide. Parts usually ship within 3 to 7 working days of order confirmation, and the exact lead time and shipping options are stated on your quote. Include your delivery country and postal code when you ask for a quote.
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