Allen Bradley 1753-L32BBBM-8A 1753-L32BBBP-8A GuardPLC 1600 Safety Controller

Product Details

• Part Number: 1753‑L32BBBM‑8A 

• Product Type: Safety PLC, GuardPLC 1800 Series (integrated I/O controller) 

• I/O Configuration: 32 points total – 24 digital inputs (24V DC) + 8 digital outputs (24V DC, transistor) 

• Analog Inputs: 8 non‑isolated, single‑ended (0–10V DC or 4–20mA, software‑selectable), 12‑bit resolution 

• High‑Speed Counters: 2 non‑isolated, 24‑bit resolution, up to 1 MHz 

• Memory: 250 KB user program + 250 KB application data 

• Communication: Modbus (RTU slave via RS‑485), embedded 4‑port Ethernet switch (supports GuardPLC Ethernet & EtherNet/IP) 

• Power Supply: 24V DC, 8A 

• Safety Rating: SIL 3 (IEC 61508), PLe / Category 4 (ISO 13849‑1) 

• Protection: IP20 

• Dimensions (WxHxD): 114 x 257 x 80 mm (4.49 x 10.1 x 3.15 in) 

• Weight: approx. 1.2 kg (2.6 lb) 

Related Product Recommendations

Payment & Delivery

FAQs

Q1: What is the difference between the 1753‑L32BBBM‑8A and a standard PLC?
This is a safety‑certified controller (SIL 3 / Cat. 4) with built‑in diagnostics and failsafe behavior. It detects faults in its own control logic and forces all affected I/O to a safe state (e.g., outputs off) to prevent hazardous conditions . Standard PLCs lack these dedicated safety features.

Q2: What communication protocols does this controller support?
It supports Modbus RTU (slave) via the RS‑485 port for exchanging signal values with other devices , and has an embedded 4‑port Ethernet switch for GuardPLC Ethernet and EtherNet/IP networking .

Q3: What are the output current ratings per channel?
Channels 4 and 8 can handle 1A at 60°C; all other output channels are rated at 0.5A at 60°C. Each group of outputs has a common return with a maximum total current of 8A .

Q4: Can I add more I/O to this controller?
Yes. The 1753‑L32BBBM‑8A integrates seamlessly with 1753 GuardPLC distributed safety I/O modules (e.g., 1753‑IB16, 1753‑OB16) via the GuardPLC Ethernet network to expand your system.

Q5: Is the controller hot‑swappable?
The controller itself is not designed for field hot‑swapping like a standalone I/O module. However, it uses removable terminal blocks (RTBs) that allow the controller to be efficiently exchanged with a spare unit in the event of a failure, minimizing downtime.