The Allen‑Bradley 1753‑L32BBBM‑8A is a high‑performance GuardPLC 1800 safety controller with integrated I/O. It combines a SIL 3 / Category 4 safety PLC with 32 onboard I/O points, analog inputs, and high‑speed counters in a compact, integrated design—ideal for small to medium‑sized safety applications such as emergency shutdowns, safety gate interlocking, and burner control.
Item No :
1753-L32BBBM-8AOrder(MOQ) :
1 PiecePayment :
EXWProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
5KGPart 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)
| Category | Model | Key Features |
|---|---|---|
| Safety Output Module | 1753‑OB16 | 16‑point 24V DC safety digital outputs, SIL 3, 2A per point |
| Safety Input Module | 1753‑IB16 | 16‑point 24V DC safety digital inputs |
| Mixed I/O Module | 1753‑IB20XOB8 | 20 inputs / 8 outputs for flexible configurations |
| GuardPLC Controller | 1753‑L28BBBM | GuardPLC 1600 series, 28 I/O points (20 DI / 8 DO), Modbus support |
| Programming Software | RSLogix Guard PLUS! | Required for configuration, programming, and firmware management |
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.
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