New Siemens digital input module 6ES7321-1CH00-0AA0
6ES7321-1CH00-0AA0 is a Siemens SIMATIC S7-300 SM 321 digital input (DI) module, featuring 16 isolated channels for 24–48 V DC signals, designed for industrial automation signal acquisition with high noise immunity and seamless integration with S7-300/ET 200M systems. Below are its core English parameters and key notes.
Core English Parameters (6ES7321-1CH00-0AA0)
Category
Specifications
Basic Info
Model: 6ES7321-1CH00-0AA0
Brand: Siemens
Type: Digital Input Module (DI), SM 321
Application: Industrial automation (sensor signal acquisition, device status monitoring, etc.)
Compatibility: SIMATIC S7-300, ET 200M
Mounting: Rail-mounted (40 mm width), fits S7-300 rack/ET 200M
Connection: 40-pin front connector (requires 6ES7 921-3AA00-0AA0)
Input Specifications
Number of Channels: 16 (1 group, potential-isolated)
Input Voltage: 24–48 V DC (residual ripple ≤10% of UB)
Input Current: Typ. 2.7 mA (24 V DC); Max. 3.5 mA (48 V DC)
Input Type: IEC 61131-2 Type 1 (sink/source selectable)
Switching Delay: 1.2 ms (0→1); 4.8 ms (1→0)
Max. Cable Length: Shielded: 1000 m; Unshielded: 600 m
Isolation: Channel-to-backplane: 500 V AC (1 min); Channel-to-channel: Potential-isolated
Electrical Specifications
Backplane Bus Current: ≤100 mA (5 V DC from rack)
Power Loss: Typ. 1.5 W (24 V DC); Typ. 2.8 W (48 V DC)
Operating Temperature: 0–60 °C (horizontal/vertical mounting)
Storage Temperature: -40–85 °C
Humidity: 5–95% (non-condensing)
Protection Class: IP20 (module-level, enclosed in cabinet)
Certifications: CE, UL, RoHS compliant
Key Features
- Potential isolation for noise immunity
- LED indicators for channel status
- Hot-swappable with active bus modules (ET 200M)
- Address determined by slot position (no slot rules)
- Suitable for 2-wire proximity switches (BERO) and standard switches
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