Siemens 6ES7321-1BL00-0AA0 is a digital input module, which is part of the SIMATIC S7-300 series PLC. This module is mainly used in industrial automation control systems to collect external digital signals (such as switches, sensor signals) and convert them into logical signals (0 or 1) that can be processed by the PLC. The following is a detailed introduction of this product
- Model: 6ES7321-1BL00-0AA0
- Type: Digital Input Module (SM 321)
- Number of input channels: 32
- Input voltage: 24V DC (rated value), allowable range 20.4V ~ 28.8V DC
- Isolation method: optoelectronic isolation (between channel and backplane bus)
- Connection method: 40-pin front connector
- Power consumption: typical 6.5W
- Dimensions: 40mm (width) × 125mm (height) × 120mm (depth)
- Weight: about 260g
- Supports the connection of standard switches and two-wire proximity switches (BERO).
- Input signal range:
- Logic "0": -30V to +5V
- Logic "1": +13V to +30V
- Input delay:
- 0→1: 1.2ms (minimum) to 4.8ms (maximum)
- 1→0: 1.2ms (minimum) to 4.8ms (maximum)
- Support long-distance wiring:
- Shielded cable: up to 1000m
- Unshielded cable: up to 600m
- Suitable for industrial automation control, such as:
- Production line sensor signal acquisition
- Packaging machinery control
- Lighting system management
- Can be integrated into the ET 200M distributed I/O system, supporting hot swapping (active bus module required).
- Compact design: modular structure, with LED status indicator (green).
- High reliability: with reverse polarity protection to prevent wiring errors from damaging the module.
- Plug and Play: the module address is determined by the slot, no additional configuration is required.
- Strong compatibility: suitable for S7-300 PLC and PROFIBUS-DP network.
Compared with other models in the same series (such as 16DI or 64DI modules), this module has a higher channel density and is suitable for application scenarios that require a large number of digital inputs.
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