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Siemens 6ES7321-1BH50-0AA0 SIMATIC S7-300 SM 321 16DI DC24V Source Input Module
Manufacturer: Siemens
Condition: Brand New
Lead Time: In Stock
Origin: Germany
Warranty: 12 Months
Email: [email protected]
whatsApp: +86-18150117685
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Overview
- Reference input voltages to L+.
- Keep the sixteen channels in their defined potential group.
- Observe the +40 °C vertical mounting limit.
- Do not configure unsupported input interrupts.
6ES7321-1BH50-0AA0 SIMATIC S7-300 SM 321 16DI DC24V Source Input Module
A 16-channel sourcing-input SM 321 module with one isolated input group, a 20-pin front connection and fixed input filtering.
At a Glance
| Brand | Siemens |
|---|---|
| Model | 6ES7321-1BH50-0AA0 |
| Product Type | Digital input signal module |
| Core Function | Reading source-input field circuits |
| Application | SIMATIC S7-300 signal-module racks |
Source-input circuit
Input thresholds are referenced to L+, matching the module’s source-input wiring.
Sixteen-channel group
All sixteen input channels belong to one isolated group.
No event interrupts
The module supplies input states and green status LEDs without diagnostic or hardware-interrupt functions.
Product Overview
6ES7321-1BH50-0AA0 acquires sixteen 24 V DC source-input signals in an S7-300 rack.
The inputs are electrically isolated in one group of sixteen and accept switches or compatible two-, three- and four-wire proximity sensors through a 20-pin front connector.
Key Functions
Read source-input sensors
The ON threshold is −13 to −30 V relative to L+, with the signal circuit wired for source-input operation.
Filter signal changes
Both input transitions use a fixed delay range of 1.2–4.8 ms.
Monitor input state locally
A green status LED for each channel indicates its input state.
Official Specifications
| Digital input count | 16 |
|---|---|
| Nominal input voltage | 24 V DC |
| ON threshold relative to L+ | −13 to −30 V |
| OFF threshold relative to L+ | −5 to +30 V |
| Typical ON-state input current | 7 mA |
| Input delay, rising and falling edges | 1.2–4.8 ms, not adjustable |
| Input characteristic | IEC 61131 type 1 |
| Two-wire sensor quiescent-current limit | 1.5 mA |
| Maximum cable length | 600 m unshielded; 1,000 m shielded |
| Simultaneously active inputs | 16 at up to +60 °C horizontal or +40 °C vertical |
| Isolation grouping | One group of 16 channels, isolated from the backplane bus |
| Isolation test voltage | 500 V DC |
| Maximum backplane-bus current | 10 mA |
| Typical module power loss | 3.5 W |
| Signal wiring connector | 20-pin front connector |
| Status indication | Green LED per channel |
| Dimensions (W × H × D) | 40 × 125 × 117 mm |
| Approximate module weight | 200 g |
Frequently Asked Questions
Which reference potential should I use when evaluating input voltage on 6ES7321-1BH50-0AA0?
The input-voltage thresholds are referenced to L+.
Can 6ES7321-1BH50-0AA0 be substituted without changing a circuit designed for a sinking-input module?
No, the field circuit must match this module’s source-input arrangement.
Can all sixteen inputs of 6ES7321-1BH50-0AA0 remain active at a horizontal ambient temperature of 60 °C?
Yes, all sixteen inputs are permitted to be active with horizontal installation up to 60 °C.
Does vertical mounting reduce the operating temperature limit for sixteen active channels on 6ES7321-1BH50-0AA0?
Yes, the limit for that arrangement is 40 °C.
Will 6ES7321-1BH50-0AA0 call an interrupt block when a channel changes state?
No, this signal module has no interrupt function.
Which front-connector size is required for 6ES7321-1BH50-0AA0?
Field signal transmitters connect through a 20-pin front connector.
Can I tune the input delay of 6ES7321-1BH50-0AA0 in the hardware configuration?
No, the input delay is fixed within the specified 1.2–4.8 ms range.
