Allen‑Bradley 1753‑L32BBBM‑8A
I. Basic Positioning
Brand: Rockwell Allen-Bradley
Series: GuardPLC 1800 Safety PLC (SIS Safety Controller)
Model: 1753-L32BBBM-8A
Appearance: Red safety integrated machine controller. The original factory has discontinued it. It is only available in inventory or as disassembled spare parts for sale.
Model Segmentation Explanation
1753 = GuardPLC 1800 Safety Controller Series
L32 = Total 32 points of I/O (24DI + 8DO)
BBBM: Configuration of IO Electrical Type
BB: 24 Digital Inputs (24VDC sinking/sourcing universal)
B: 8 Transistor Digital Outputs
M: Integrated Modbus Communication Function
8A = 24VDC Power Supply, Maximum 8A Total Machine Power Capacity, Hardware Version A
Complete IO Hardware Specifications
1. Digital Input DI: 24 channels
Power Supply: DC 10～30V
Compatible with NPN/PNP sensors, safety doors, emergency stops, valve feedback relay contacts
No channel electrical isolation (internal safety logic self-diagnosis verification)
2. Digital Output DO: 8 Transistor Outputs
Channels 1/2/3/5/6/7: Rated 0.5A / Point @ 60℃
Channels 4, Channel 8: Heavy Load 1A / Point, Suitable for driving solenoid valves, safety relays
Output short circuit, load open circuit automatic fault diagnosis, when fault occurs, forcibly enter safe state
3. Built-in Additional Functions
2 24-bit High-Speed Counters, Non-isolated, Support for encoders, pulse flow meters collection
8 Single-Polarity Analog Inputs (0～10V/4～20mA), Used for temperature, pressure safety monitoring
4. Storage Capacity
User Program Memory: 250 KB
Data / Formula / Fault Record Memory: 250 KB
Watchdog Safety Timeout: 10ms, Safety Fault Response 20ms
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