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Siemens 6ES7321-7RD00-0AB0
Spare part ********* SIMATIC S7, digital input SM 321, isolated, 4 DI; 24 V DC, NAMUR/DIN 19234
- MPN
- 6ES7321-7RD00-0AB0
- Category
- CPU & Controllers
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- 12-month warranty (new) · 3-month (used/refurbished)
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What is the Siemens 6ES7321-7RD00-0AB0?
********** spare part ********* SIMATIC S7, digital input SM 321, isolated, 4 DI; 24 V DC, NAMUR/DIN 19234, for signals from the hazardous area, diagnostics-capable, PTB tested,
Specifications
Supply voltage
| Load voltage L+ — Rated value (DC) | 24 V |
| Load voltage L+ — Reverse polarity protection | Yes |
Input current
| from load voltage L+ (without load), max. | 50 mA |
| from backplane bus 5 V DC, max. | 80 mA |
Encoder supply
| Type of output voltage | via the inputs |
Power loss
| Power loss, typ. | 1.1 W |
Digital inputs
| Number of digital inputs | 4 |
| Number of NAMUR inputs | 4 |
| Input voltage — Type of input voltage | DC |
| Input voltage — Rated value (DC) | 8.2 V; from internal power circuit supply |
| Input current — on wire-break, max. | 0.1 mA |
| Input current — on short-circuit, max. | 8.5 mA |
| Input current — for NAMUR encoders — for signal "0", min. | 0.35 mA |
| Input current — for NAMUR encoders — for signal "0", max. | 1.2 mA |
| Input current — for NAMUR encoders — for signal "1", min. | 2.1 mA |
| Input current — for NAMUR encoders — for signal "1", max. | 7 mA |
| Input delay (for rated value of input voltage) — Input frequency (with a time delay of 0.1 ms), max. | 2 kHz |
| Input delay (for rated value of input voltage) — for NAMUR inputs — Parameterizable | Yes; 0.1 / 0.5 / 3 / 15 / 20 ms (plus 0.25 ms preparation time) |
| Cable length — unshielded, max. | 200 m |
Encoder
| Connectable encoders — NAMUR encoder | Yes; Two-wire connection |
Interrupts/diagnostics/status information
| Diagnostics function | Yes |
| Diagnoses — Diagnostic information readable | Yes |
| Diagnostics indication LED — Group error SF (red) | Yes |
| Diagnostics indication LED — Status indicator digital input (green) | Yes |
| Diagnostics indication LED — Channel fault indicator F (red) | Yes |
Ex(i) characteristics
| Module for Ex(i) protection | Yes |
| maximum values for connecting terminals for gas group IIC — Uo (no-load voltage), max. | 10 V |
| maximum values for connecting terminals for gas group IIC — Io (short-circuit current), max. | 14.1 mA |
| maximum values for connecting terminals for gas group IIC — Po (power output), max. | 33.7 mW |
| maximum values for connecting terminals for gas group IIC — Co (permissible external capacity), max. | 3 µF |
| maximum values for connecting terminals for gas group IIC — Lo (permissible external inductivity), max. | 100 mH |
Potential separation
| Potential separation digital inputs — between the channels | Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
| Potential separation digital inputs — between the channels, in groups of | 1 |
| Potential separation digital inputs — between the channels and backplane bus | Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
| Potential separation digital inputs — Between the channels and load voltage L+ | Yes; 60 V DC/30 V AC when used in the hazardous area; 400 V DC/250 V AC when used in NON-hazardous area |
Standards, approvals, certificates
| Use in hazardous areas — ATEX marking | ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc |
| Use in hazardous areas — FM marking | Class II, Division 2, Group A, B, C, D T4 |
| Use in hazardous areas — Test number PTB | Ex-96.D.2094X |
Ambient conditions
| Ambient temperature during operation — max. | 60 °C |
Connection method
| required front connector | 20-pin |
Dimensions
| Width | 40 mm |
| Height | 125 mm |
| Depth | 120 mm |
Weights
| Weight, approx. | 230 g |
Downloads & documentation
Official documents from Siemens, downloaded directly from the manufacturer.
Data sheets & manuals
6ES7321-7RD00-0AB0: frequently asked questions
When can 6ES7321-7RD00-0AB0 be shipped?
6ES7321-7RD00-0AB0 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up 6ES7321-7RD00-0AB0 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for 6ES7321-7RD00-0AB0 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 6ES7321-7RD00-0AB0, subject to availability and destination.
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