Allen-Bradley 1769-L18ER-BB1B Programmable Logic Controllers
The Allen-Bradley 1769-L18ER-BB1B, also cataloged as the 1769-L18ER-BB1B CompactLogix Controller, operates as a dedicated hardware component for integrated logic execution and distributed motion control within EtherNet/IP networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L18ER-BB1B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.91 kg (2.01 lbs) |
| Dimensions | Standard CompactLogix 5370 L1 Chassis Form Factor |
| Operating Temp | 0 deg C to +60 deg C |
| Power Consumption | 24 VDC Nominal |
| Integrated Digital Inputs | 16 DC Inputs (24 VDC) |
| Integrated Digital Outputs | 16 DC Outputs (24 VDC) |
| Embedded User Memory | 512 KB |
| Local Expansion Capacity | Up to 8 POINT I/O (1734) Modules |
| EtherNet/IP Node Capacity | 8 Ethernet Nodes (Supports Device Level Ring - DLR) |
| Communication Ports | Dual EtherNet/IP Ports, USB Port |
| Terminal Wire Size | 22 to 14 AWG |
| Mounting Style | DIN Rail Mounting |
Deterministic Network Interfacing & Backplane Bus Communication
The Allen-Bradley 1769-L18ER-BB1B incorporates dual EtherNet/IP ports featuring Device Level Ring (DLR) topology to sustain high-velocity deterministic networks without single-point cable failure. Interfacing through the integrated backplane bus, the controller coordinates onboard embedded I/O while maintaining synchronization across up to 8 local 1734 POINT I/O expansion modules. Dynamic I/O density scaling enables low-latency packet processing for 16 embedded DC inputs and 16 DC outputs. Onboard firmware flash compatibility permits field updating via Studio 5000 Logix Designer software, facilitating high-speed data execution and seamless tag exchanges across distributed controller architectures.
Frequently Asked Questions
Q: What expansion module family is compatible with the local backplane of the 1769-L18ER-BB1B?
A: The 1769-L18ER-BB1B expands locally using up to 8 1734 POINT I/O modules mounted directly to the right side of the controller chassis.
Q: Can the 1769-L18ER-BB1B controller or attached POINT I/O modules be hot-swapped during backplane operation?
A: No. Power to the 24 VDC main terminal block must be isolated prior to removing or installing the controller or attached 1734 I/O modules. Hot-plugging hardware can cause backplane contact arcing and logic corruption.
Q: How is application program memory preserved when incoming 24 VDC system power is disconnected?
A: The controller utilizes nonvolatile flash memory backed by an energy storage module (ESM), eliminating the requirement for external lithium batteries to retain application code and system configurations during power interruptions.
Field Installation Guidelines
Mount the 1769-L18ER-BB1B directly onto a standard 35 mm DIN rail inside a NEMA-rated enclosure. Ensure top and bottom chassis latch mechanisms fully engage the rail structure to maintain physical stability against vibration.
Field power wiring (24 VDC) and embedded I/O connections must be wired using 22 to 14 AWG copper conductors rated for at least 75 deg C. Route high-speed EtherNet/IP cables in dedicated wireways separate from high-voltage AC lines and motor power cables. Connect the terminal block earth grounding lug directly to the cabinet main earth grounding bar using a low-impedance conductor.
| Parameter | Specification |
|---|---|
| Model | 1794-TB3S |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.44 lbs (0.20 kg) |
| Dimensions | Standard FLEX I/O Base Footprint |
| Operating Temp | 0 to 55 deg C (32 to 131 deg F) |
| Power Consumption / Rating | 125 VAC/DC, 10 A max through bus |
| Termination Type | Spring-Clamp |
| I/O Terminals | 16 I/O Terminals (0-15) |
| Common Terminals | 18 Common Terminals |
| Voltage Terminals | 18 +Voltage Terminals |
| Enclosure / Mounting | Open Style, DIN Rail Mounted (IP20) |
Backplane Communications & High-Density Termination
The 1794-TB3S provides backplane interconnect execution via integrated male and female edge connectors, allowing seamless pass-through of system power and deterministic I/O data buses between adjacent FLEX I/O bases. Its spring-clamp wiring cage design maintains continuous clamping force against high-vibration environments, preventing field wiring loosening and signal dropouts. The internal backplane bus compatibility supports firmware flash synchronization and hot-swappable module insertion (Removal and Insertion Under Power) without interrupting backplane communication across adjacent I/O slots.
Frequently Asked Questions
Q: What are the wire strip length and conductor sizing requirements for the spring-clamp terminals?
A: Field conductors should be stripped to 9.5 mm (0.37 in). The spring-clamp terminals accommodate solid or stranded copper wire sizes ranging from 0.33 to 2.5 mm sq (22 to 14 AWG) rated at 75 deg C or higher.
Q: Can the 1794-TB3S terminal base be inserted or removed while the system backplane is energized?
A: No. While digital I/O modules plugged into the base support Removal and Insertion Under Power (RIUP), the 1794-TB3S terminal base itself must be installed or removed only when backplane power and field wiring supplies are completely isolated to prevent connector arc damage.
Q: How is field power isolated between adjacent 1794-TB3S bases on the same DIN rail?
A: Field wiring power buses (+V and Common) pass through internal power jumpers between bases. To create separate power isolation zones, the user must insert an isolation key or break the power jumper chain as specified in the FLEX I/O system mounting architecture.
Field Installation Guidelines
- Mount the DIN rail horizontally, ensuring proper grounding of the rail to the enclosure backplate to satisfy EMC immunity standards.
- Snap the 1794-TB3S terminal base onto the DIN rail, pressing firmly until the locking latch engages the rail lip securely.
- Slide the base firmly to the left to mate its backplane connector with the adjacent adapter or preceding terminal base unit.
- Insert a small flat-blade screwdriver into the spring-clamp release slot, insert the stripped conductor into the wire hole, and release the screwdriver to lock the wire.
- Set the module keying dial on the base to the required position for the specific I/O module type before inserting the active I/O card.
Allen-Bradley 1769-L18ER-BB1B Programmable Logic Controllers
Allen-Bradley 1769-L18ER-BB1B Programmable Logic Controllers
The Allen-Bradley 1769-L18ER-BB1B, also cataloged as the 1769-L18ER-BB1B CompactLogix Controller, operates as a dedicated hardware component for integrated logic execution and distributed motion control within EtherNet/IP networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L18ER-BB1B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.91 kg (2.01 lbs) |
| Dimensions | Standard CompactLogix 5370 L1 Chassis Form Factor |
| Operating Temp | 0 deg C to +60 deg C |
| Power Consumption | 24 VDC Nominal |
| Integrated Digital Inputs | 16 DC Inputs (24 VDC) |
| Integrated Digital Outputs | 16 DC Outputs (24 VDC) |
| Embedded User Memory | 512 KB |
| Local Expansion Capacity | Up to 8 POINT I/O (1734) Modules |
| EtherNet/IP Node Capacity | 8 Ethernet Nodes (Supports Device Level Ring - DLR) |
| Communication Ports | Dual EtherNet/IP Ports, USB Port |
| Terminal Wire Size | 22 to 14 AWG |
| Mounting Style | DIN Rail Mounting |
Deterministic Network Interfacing & Backplane Bus Communication
The Allen-Bradley 1769-L18ER-BB1B incorporates dual EtherNet/IP ports featuring Device Level Ring (DLR) topology to sustain high-velocity deterministic networks without single-point cable failure. Interfacing through the integrated backplane bus, the controller coordinates onboard embedded I/O while maintaining synchronization across up to 8 local 1734 POINT I/O expansion modules. Dynamic I/O density scaling enables low-latency packet processing for 16 embedded DC inputs and 16 DC outputs. Onboard firmware flash compatibility permits field updating via Studio 5000 Logix Designer software, facilitating high-speed data execution and seamless tag exchanges across distributed controller architectures.
Frequently Asked Questions
Q: What expansion module family is compatible with the local backplane of the 1769-L18ER-BB1B?
A: The 1769-L18ER-BB1B expands locally using up to 8 1734 POINT I/O modules mounted directly to the right side of the controller chassis.
Q: Can the 1769-L18ER-BB1B controller or attached POINT I/O modules be hot-swapped during backplane operation?
A: No. Power to the 24 VDC main terminal block must be isolated prior to removing or installing the controller or attached 1734 I/O modules. Hot-plugging hardware can cause backplane contact arcing and logic corruption.
Q: How is application program memory preserved when incoming 24 VDC system power is disconnected?
A: The controller utilizes nonvolatile flash memory backed by an energy storage module (ESM), eliminating the requirement for external lithium batteries to retain application code and system configurations during power interruptions.
Field Installation Guidelines
Mount the 1769-L18ER-BB1B directly onto a standard 35 mm DIN rail inside a NEMA-rated enclosure. Ensure top and bottom chassis latch mechanisms fully engage the rail structure to maintain physical stability against vibration.
Field power wiring (24 VDC) and embedded I/O connections must be wired using 22 to 14 AWG copper conductors rated for at least 75 deg C. Route high-speed EtherNet/IP cables in dedicated wireways separate from high-voltage AC lines and motor power cables. Connect the terminal block earth grounding lug directly to the cabinet main earth grounding bar using a low-impedance conductor.
| Parameter | Specification |
|---|---|
| Model | 1794-TB3S |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.44 lbs (0.20 kg) |
| Dimensions | Standard FLEX I/O Base Footprint |
| Operating Temp | 0 to 55 deg C (32 to 131 deg F) |
| Power Consumption / Rating | 125 VAC/DC, 10 A max through bus |
| Termination Type | Spring-Clamp |
| I/O Terminals | 16 I/O Terminals (0-15) |
| Common Terminals | 18 Common Terminals |
| Voltage Terminals | 18 +Voltage Terminals |
| Enclosure / Mounting | Open Style, DIN Rail Mounted (IP20) |
Backplane Communications & High-Density Termination
The 1794-TB3S provides backplane interconnect execution via integrated male and female edge connectors, allowing seamless pass-through of system power and deterministic I/O data buses between adjacent FLEX I/O bases. Its spring-clamp wiring cage design maintains continuous clamping force against high-vibration environments, preventing field wiring loosening and signal dropouts. The internal backplane bus compatibility supports firmware flash synchronization and hot-swappable module insertion (Removal and Insertion Under Power) without interrupting backplane communication across adjacent I/O slots.
Frequently Asked Questions
Q: What are the wire strip length and conductor sizing requirements for the spring-clamp terminals?
A: Field conductors should be stripped to 9.5 mm (0.37 in). The spring-clamp terminals accommodate solid or stranded copper wire sizes ranging from 0.33 to 2.5 mm sq (22 to 14 AWG) rated at 75 deg C or higher.
Q: Can the 1794-TB3S terminal base be inserted or removed while the system backplane is energized?
A: No. While digital I/O modules plugged into the base support Removal and Insertion Under Power (RIUP), the 1794-TB3S terminal base itself must be installed or removed only when backplane power and field wiring supplies are completely isolated to prevent connector arc damage.
Q: How is field power isolated between adjacent 1794-TB3S bases on the same DIN rail?
A: Field wiring power buses (+V and Common) pass through internal power jumpers between bases. To create separate power isolation zones, the user must insert an isolation key or break the power jumper chain as specified in the FLEX I/O system mounting architecture.
Field Installation Guidelines
- Mount the DIN rail horizontally, ensuring proper grounding of the rail to the enclosure backplate to satisfy EMC immunity standards.
- Snap the 1794-TB3S terminal base onto the DIN rail, pressing firmly until the locking latch engages the rail lip securely.
- Slide the base firmly to the left to mate its backplane connector with the adjacent adapter or preceding terminal base unit.
- Insert a small flat-blade screwdriver into the spring-clamp release slot, insert the stripped conductor into the wire hole, and release the screwdriver to lock the wire.
- Set the module keying dial on the base to the required position for the specific I/O module type before inserting the active I/O card.
