24 VSupply voltage / Load voltage L+ / Rated value (DC)
20.4 VSupply voltage / Load voltage L+ / permissible range, lower limit (DC)
28.8 VSupply voltage / Load voltage L+ / permissible range, upper limit (DC)
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
6ES7321-7BH01-0AB0
General information / Product function / Isochronous mode
Yes
Supply voltage / Load voltage L+ / Rated value (DC)
24 V
Supply voltage / Load voltage L+ / permissible range, lower limit (DC)
20.4 V
Supply voltage / Load voltage L+ / permissible range, upper limit (DC)
28.8 V
Supply voltage / Load voltage L+ / Reverse polarity protection
Yes
Input current / from load voltage L+ (without load), max.
90 mA
Input current / from backplane bus 5 V DC, max.
130 mA
Encoder supply / Number of outputs
2
Encoder supply / Type of output voltage
L+ (-2.5 V)
Encoder supply / Short-circuit protection
Yes; Electronic
Encoder supply / additional (redundant) feed
Yes
Encoder supply / Output current / Rated value
120 mA
Encoder supply / Output current / permissible range, lower limit
0 mA
Encoder supply / Output current / permissible range, upper limit
150 mA
Power loss / Power loss, typ.
4 W
Digital inputs / Number of digital inputs
16
Digital inputs / Input characteristic curve in accordance with IEC 61131, type 2
Yes
Digital inputs / Number of simultaneously controllable inputs / horizontal installation / up to 40 °C, max.
16
Digital inputs / Number of simultaneously controllable inputs / horizontal installation / up to 60 °C, max.
16
Digital inputs / Number of simultaneously controllable inputs / vertical installation / up to 40 °C, max.
16
Digital inputs / Input voltage / Type of input voltage
DC
Digital inputs / Input voltage / Rated value (DC)
24 V
Digital inputs / Input voltage / for signal "0"
-30 to +5 V
Digital inputs / Input voltage / for signal "1"
13 to 30V
Digital inputs / Input current / for signal "1", typ.
7 mA
Digital inputs / Input delay (for rated value of input voltage) / for standard inputs / parameterizable
Yes; 0.1 / 0.5 / 3 / 15 / 20 ms
Digital inputs / Encoder connection / Fixed current limitation for wire-break monitoring, min.
10 kΩ
Digital inputs / Encoder connection / Fixed current limitation for wire-break monitoring, max.
Interrupts/diagnostics/status information / Alarms
Yes
Interrupts/diagnostics/status information / Diagnostics function
Yes; Parameterizable
Interrupts/diagnostics/status information / Alarms / Diagnostic alarm
Yes; Parameterizable
Interrupts/diagnostics/status information / Alarms / Hardware interrupt
Yes; Parameterizable
Interrupts/diagnostics/status information / Diagnoses / Diagnostic information readable
Yes
Interrupts/diagnostics/status information / Diagnoses / Wire break
Yes; to I< 1 mA
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 / Encoder supply Vs (green)
Yes
Potential separation / Potential separation digital inputs / between the channels
No
Potential separation / Potential separation digital inputs / between the channels, in groups of
16
Potential separation / Potential separation digital inputs / between the channels and backplane bus
Yes; Optocoupler
Isolation / Isolation tested with
500 V DC
Connection method / required front connector
20-pin
Dimensions / Width
40 mm
Dimensions / Height
125 mm
Dimensions / Depth
120 mm
Weights / Weight, approx.
200 g
Product type designation
SM 321
Number of poles
20
Connections and conditions of use
Digital inputs / Input voltage / for signal "0": -30 to +5 V
Digital inputs / Input voltage / for signal "1": 13 to 30V
Digital inputs / Input current / for signal "1", typ.: 7 mA
Digital inputs / Encoder connection / Fixed current limitation for wire-break monitoring, min.: 10 kΩ
Digital inputs / Encoder connection / Fixed current limitation for wire-break monitoring, max.: 18 kΩ
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.
