6ES7321-7RD00-0AB0, repair and sale of PLC / CNC SIEMENS
Sales, Repair, Purchase
SIMATIC S7, DIGITAL INPUT SM 321, OPTICALLY ISOLATED, 4 DI, 24V DC, NAMUR/DIN 19234, F. SIGNALS F HAZARDOUS AREAS, CAPABLE OF DIAGNOST.,PTB-TESTED More
SIMATIC S7, DIGITAL INPUT SM 321, OPTICALLY ISOLATED, 4 DI, 24V DC, NAMUR/DIN 19234, F. SIGNALS F HAZARDOUS AREAS, CAPABLE OF DIAGNOST.,PTB-TESTED More
24 VSupply voltage / Load voltage L+ / Rated value (DC)
YesSupply voltage / Load voltage L+ / Reverse polarity protection
4Digital inputs / Number of digital inputs
Application and selection
Compare the complete order number and specifications below with the original part and machine wiring. Check the design, interfaces, supply voltage or connection method as applicable to this product.
Technical specifications
Manufacturer
Siemens
Order number
6ES7321-7RD00-0AB0
Supply voltage / Load voltage L+ / Rated value (DC)
24 V
Supply voltage / Load voltage L+ / Reverse polarity protection
Yes
Input current / from load voltage L+ (without load), max.
50 mA
Input current / 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
Digital inputs / Number of NAMUR inputs
4
Digital inputs / Input voltage / Type of input voltage
DC
Digital inputs / Input voltage / Rated value (DC)
8.2 V; from internal power circuit supply
Digital inputs / Input current / on wire-break, max.
0.1 mA
Digital inputs / Input current / on short-circuit, max. for NAMUR encoders
8.5 mA
Digital inputs / Input current / for signal "0", min.
0.35 mA
Digital inputs / Input current / for signal "0", max.
1.2 mA
Digital inputs / Input current / for signal "1", min.
2.1 mA
Digital inputs / Input current / for signal "1", max.
7 mA
Digital inputs / Input delay (for rated value of input voltage) / Input frequency (with a time delay of 0.1 ms), max. for NAMUR inputs
2 kHz
Digital inputs / Input delay (for rated value of input voltage) / Parameterizable
Yes; 0.1 / 0.5 / 3 / 15 / 20 ms (plus 0.25 ms preparation time)
Digital inputs / Cable length / unshielded, max.
200 m
Encoder / Connectable encoders / NAMUR encoder
Yes; Two-wire connection
Interrupts/diagnostics/status information / Diagnostics function
Yes
Interrupts/diagnostics/status information / Diagnoses / Diagnostic information readable
Yes
Interrupts/diagnostics/status information / Diagnostics indication LED / Group error SF (red)
Yes
Interrupts/diagnostics/status information / Diagnostics indication LED / Status indicator digital input (green)
Yes
Interrupts/diagnostics/status information / Diagnostics indication LED / Channel fault indicator F (red)
Yes
Ex(i) characteristics / Module for Ex(i) protection
Yes
Ex(i) characteristics / maximum values for connecting terminals for gas group IIC / Uo (no-load voltage), max.
10 V
Ex(i) characteristics / maximum values for connecting terminals for gas group IIC / Io (short-circuit current), max.
14.1 mA
Ex(i) characteristics / maximum values for connecting terminals for gas group IIC / Po (power output), max.
33.7 mW
Ex(i) characteristics / maximum values for connecting terminals for gas group IIC / Co (permissible external capacity), max.
3 µF
Ex(i) characteristics / 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 / Potential separation digital inputs / between the channels, in groups of
1
Potential separation / 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 / 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
Ambient conditions / Ambient temperature during operation / max.
60 °C
Connection method / required front connector
20-pin
Dimensions / Width
40 mm
Dimensions / Height
125 mm
Dimensions / Depth
120 mm
Weights / Weight, approx.
230 g
Product type designation
SM 321
Connections and conditions of use
Digital inputs / Input current / for signal "0", min.: 0.35 mA
Digital inputs / Input current / for signal "0", max.: 1.2 mA
Digital inputs / Input current / for signal "1", min.: 2.1 mA
Digital inputs / Input current / for signal "1", max.: 7 mA
Connection method / required front connector: 20-pin
Scope of supply
We will confirm the exact version, package contents and related accessories before ordering. Package information in the technical table applies to the stated order number.
Frequently asked questions
Is the same product family enough to identify a replacement?
The complete order number is essential. If the type changes, compare the electrical and mechanical design, connections and requirements of the original application.
What information is needed to check connections and accessories?
Send a nameplate photo, the designations of related modules and connectors and, where needed, a wiring diagram. We will check the specific version for your application.
Can you assess a faulty part?
Yes. Send the complete order number and a description of the fault. We will check the diagnostic and professional repair options for your specific unit.
Why buy from FOXON
1
Replacement part availability
We will check current part availability and confirm the possible delivery date before you order.
2
New original and refurbished parts
We will specify the available version and condition of the particular unit in the quotation.
3
Parts with a warranty
We will confirm the warranty period according to the part condition and specific quotation.
4
Diagnostics and repairs
For a faulty unit, we will check the options for diagnostics and professional repair.
More than 3,500customers
We deliver tomore than 100 countries
Express delivery?We will check. Contact us now.
Part conditions available for sale
Part conditions and warranty
New, sealed (NC): Brand-new, unused part in unopened original packaging. 12-month warranty.
New, opened (NO): Brand-new and unused part, but the original packaging has been opened. 12-month warranty.
New, without packaging (NW): Brand-new and unused part, supplied without original packaging. 12-month warranty.
New (N): New and unused part, typically smaller components supplied in multi-packs in one original package. 12-month warranty.
Refurbished (R): Part has been removed from service, cleaned, inspected and tested to meet original functionality and quality. 12-month warranty.
Used, tested (T): Functional used part that has passed full testing. 6-month warranty.
Used (U): Functional used part. 3-month warranty.
Sales, repairs and buyback of automation parts
We supply replacement parts for industrial automation and assess faulty units for diagnostics and repair. We also buy surplus parts. Send the exact designation and required quantity.
