Product Information

SIMATIC S7-300
X 2
Analog Output Module SM 332; AO 4
16 Bit as of Version 3 4

New Analog Output Module Available

The S7-300 Analog Output Module SM 332; AO 4 × 16 Bit has been added to the
S7-300 family. The order number for this module is 6ES7 332-7ND02-0AB0.
This product information includes details about the characteristics and technical
specifications of the Analog Output module SM 332; AO 4 × 16 Bit. Refer to the
S7-300 Installation and Hardware Manual for more information about the S7-300
product family.
You will also learn:
S How to start up the analog output module
S The output ranges available for the analog output module
S How to configure the analog output module

Additional Assistance
For assistance in answering technical questions, for training on this product, or for
ordering, contact your Siemens distributor or sales office.

Copyright by Siemens AG 2004

A5E0033348892-01
Analog Output Module SM 332; AO 4
16 Bit; (6ES7 332-7ND02-0AB0)

Order No.
6ES7 332-7ND02-0AB0

Characteristic Features
The Analog Output Module SM 332; AO 4 × 16 Bit has the following characteristic
features:
S 4 outputs in 4 channel groups
S Individual output channels can be programmed as
– voltage outputs
– current outputs
S Resolution of 16 bits
S Supports clocked operation
S Programmable diagnostics
S Programmable diagnostic interrupt
S Programmable substitute value output
S Galvanic Isolation between:
– backplane bus interface and analog output channels
– the different analog output channels
– analog output and L+, M
– backplane bus interface and L+, M

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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Terminal Connection Diagram
Figure 1 shows the analog terminal connection diagram and the wiring diagram for
the Output Analog Module SM 332 AO 4 × 16 Bit.
The detailed technical specifications for this analog output module are on the
following page.

Fault Indicator – red

Current Voltage
Outputs Outputs
SM332 1 L+
AO 4x16 BIT SF 24 V

Galvanic Isolation
3 QI0 QV 0

4 S 0+
5 CH0 S 0 – CH0

6 MANA 0 M ANA 0

7 QI1 QV 1
Internal
8 S 1+
supply
9 CH1 S 1 – CH1

10 MANA 1 M ANA 1

11 QI2 QV 2

12 S 2+

13 CH2 S 2 – CH2

14 MANA 2 M ANA 2

15 QI3 QV 3
Back– S 3+
plane 16
bus 17 CH3 S 3 – CH3
IM
18 MANA 3 M ANA 3

M
20
M
332–7ND02–0AB0

Figure 1 Connection Diagram of Analog Output Module SM 332; AO 4 x 16 Bit

Note
Switching the rated load voltage (L+) on and off, can cause wrong intermediate
values at the output for approximately 10 ms.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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3
Hazardous Location Information
“Power, input and output (I/O) wiring must be in accordance with Class I, Division 2
wiring methods [Article 501-4 (b) of the National Electric Code, NFPA 70] and in
accordance with the authority having jurisdiction.”
Peripheral equipment must be suitable for the location it is used in.
The equipment must be suitable for use in Class I, Div. 2, Groups A, B, C, and D
Hazardous Locations and nonhazardous locations only.

Warning
! Explosion Hazard
Substitution of components may impair suitability for Class I, Div. 2 Hazardous Locations.
Different or lesser quality components may cause an explosion or other hazardous situation,
which could result in death or serious injury, and/or damage to equipment.
To avoid potentially hazardous situations, always use the appropriate components.

Warning
! Explosion Hazard
Never disconnect equipment before powering off or before ascertaining that the area is
nonhazardous. Disconnecting equipment before powering off or in a hazardous area may cause
an explosion, which could result in death or serious injury, and/or damage to equipment.
To avoid potentially hazardous situations, always power off equipment and assure that the area
is nonhazardous before disconnecting.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

4 A5E0033348892-01
Dimensions and Weight Analog Value Generation
Dimensions W × H × D (in 40 × 125 × 117 Resolution including sign
millimeters) S ± 10 V 16 bits
Weight Approx. 220 g S 0 to 10 V 15 bits
Data for Specific Module S 1 to 5 V 14 bits

Supports clocked operation Yes

S ± 20 mA 16 bits

Number of outputs 4
S 0 to 20 mA 15 bits
S 4 to 20 mA 15 bits
Length of cable
S Shielded max. 200 m Conversion time (per
channel)
Voltages, Currents, Potentials
S In standard mode < 200 ms
Power rated voltage of the 24 VDC S In clocked mode 640 ms
electronics L+
S Reverse polarity Yes Basic response time of
protection module (all channels
enabled)
Isolation S In standard mode < 800 ms
S Between channels and Yes S In clocked mode 750 ms
backplane bus
S Between channels and Yes Settling time
power supply of the S For resistive load 0.2 ms
electronics
S For capacitive load 3.3 ms
S Between the channels Yes
S For inductive load 0.5 ms
(1 mH)
Permitted potential
difference S For inductive load 3.3 ms
(10 mH)
S Between the outputs DC 200 V/AC 120 V
(ECM)
S Between MANA and DC 200 V/AC 120 V
Minternal (EISO)
Insulation tested with DC 1500 V
Current consumption
S From the backplane bus max. 120 mA
S From the power supply max. 290 mA
L+
Power dissipation of the typ. 3 W
module

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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5
Suppression of interference, Limits of Error Status, Interrupts, Diagnostics
Crosstalk between the > 100 dB Interrupts
outputs S Diagnostics interrupt Parameters can be
Operational limit (in the assigned
entire temperature Diagnostics functions Parameters can be
range, with reference to assigned
the output range)
S Group error display Red LED (SF)
S Voltage output ±0.12%
S Diagnostics information Possible
S Current output ±0.18% can be displayed
Basic error
(operational limit at Substitute value can be Yes. Parameters
25° C, with reference to applied can be assigned
the output range) Data for Selecting an Actuator
S Voltage output Output ranges (rated
± 10 V ± 0.02% values)
0 to 10 V ± 0.02% S Voltage ± 10 V
1 to 5 V ± 0.04% 0 to 10 V
1 to 5 V
S Current output
S Current ± 20 mA
± 20 mA ± 0.02% 0 to 20 mA
0 to 20 mA ± 0.02% 4 to 20 mA
4 to 20 mA ± 0.04% Load resistance (in the
nominal range of the
Temperature error (with output)
reference to the output
range) S For voltage outputs min. 1 kΩ
S Voltage output ± 0.0025% / K Capacitive load max. 1 µF
S Current output ± 0.004% / K S For current outputs max. 500 Ω
Inductive load max. 1 mH
Linearity error (with ± 0.004%
Voltage output
reference to the output
range) S Short-circuit protection Yes

Repeatability (in steady ±0.002%

S Short-circuit current max. 40 mA
state at 25° C, with
Current output
reference to the output
range) S No-load voltage max. 18 V

Output ripple; bandwidth ±0.05%

0 to 50Khz (with
reference to the output
range)

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

6 A5E0033348892-01
Destruction limit against
voltages/currents applied
from outside
S Voltage to the outputs max. 15 V
against MANA continuous; 75 V for
max. 1 s (pulse duty
factor 1:20)
S Current max. DC 50 mA

Connection of actuators Possible

S For voltage output
Four–conductor
connection (measuring
circuit)
S For current output Possible
Two–conductor
connection

Synchronous Operation

Characteristics
Reproducible response times (i.e., of equal length) are achieved in SIMATIC with
an equidistant DP bus cycle and synchronization of the following individual
asynchronous cycles:
S Asynchronous cycle of the user program. Cycle length can vary, due to
acyclical program branches.
S Asynchronous, variable DP cycle on the PROFIBUS subnet
S Asynchronous cycle on the DP slave backplane bus
S Asynchronous cycle during signal conditioning and conversion in the electronic
modules of the DP slaves
With equidistance, the DP cycle operates in the same clock cycle, with the same
length. The execution levels of a CPU (OB61 to OB64) and the synchronous I/O
are synchronized with this clock cycle. Thus, I/O data are transferred in defined,
constant time intervals (synchronous operation). The maximum “jitter” is "50 µs.

Requirements
S The DP master and DP slave must support synchronous operation. You must
have Step 7 Version 5.2 or higher.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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Operating Mode: Synchronous Operation
The following conditions are applicable for synchronous operation:

Table 1 Conditions for Synchronous Operation

Processing and activation time TWA between read in 750ms

of output value in the transfer buffer and loading in
the output DAC
TDPmin 1100ms
Diagnostic interrupt 4 x TDP, max

Processing and Output Update Time

The same time conditions are always applicable, irrespective of the number of
channels programmed.

TWA

D/A-Conversion and Internal Processing Output Update

CH3

CH2

CH1

CH0

640ms 110ms

TO

Figure 2 Calculation of the Processing Time and Output Update Time

Description of the Method of Functioning in Synchronous Operation

At time T0 – TWA, the module reads in the output data and saves the data
internally. Following internal processing time for each channel, the results are
written to each D/A converter.

Additional Information
You will find additional information about synchronous operation in the STEP 7
online Help, the ET 200M Distributed I/O System manual and the Synchronous
Operation Manual.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

8 A5E0033348892-01
Starting Up the Analog Output Module SM 332; AO 4
16 Bit

Parameter Assignment
The Analog Output Module SM 332; AO 4 × 16 Bit is set using one of the following
methods.
S With STEP 7 (see the STEP 7 User Manual)
S In the user program by means of SFCs (see the STEP 7 System and Standard
Functions Reference Manual)

Note
If you modify output ranges when the Analog Output Module SM 332; AO 4 x 16
Bit is in operation, intermediate values can appear at the output.

Default Setting
The Analog Output Module SM 332; AO 4 × 16 Bit has default settings for the type
of output, diagnostics, interrupts, etc. (see Table 1).
These default settings apply if you do not re-initialize the module with STEP 7.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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 Table 1 Parameters and Default Settings for the Analog Output Module
SM 332 AO 4 x 16 Bit.

Parameter SM 332; AO 4
16 Bit Parameter Scope

Type
Value Range Default
Settings
Enable
S Diagnostics interrupt Yes/No No Dynamic Module
Diagnostics
S Channel Diagnostics Yes/No No Static Channel
Response with CPU-STOP LWH Hold last value ASS Dynamic Channel
ASS
Output de-energized
Output
S Output Type Deactivated U Dynamic Channel
Voltage
Current
S Output Range 0 to 20 mA ± 10 V Dynamic Channel
4 to 20 mA
± 20 mA
1 to 5 V
0 to 10 V
± 10 V

Parameter Assignment in the User Program

You can configure each output channel of the SM 332; AO 4 × 16 Bit individually.
This allows you to assign individual parameters for each output channel. When you
set the parameters in the user program, the parameters are assigned to channel
groups. Each output channel of the Analog Output Module SM 332; AO 4 × 16 Bit
is then assigned to one channel group, i.e. output channel 0 = channel group 0.

Unused Output Channels

To ensure the unused output channels of the Analog Output Module SM 332;
AO 4 × 16 Bit are not active. You must deactivate them and leave them open.
Deactivate the output channel using the “Output” parameter block when you
program with STEP 7.

Substitute Values
You can configure the SM 332; AO 4 × 16 Bit for the CPU operating mode STOP
as follows: Outputs De-energized, Hold Last Value or Inject Substitute Values. If
you inject substitute values, they must be within the output range.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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Output Ranges for the Analog Output Module SM 332; AO 4 x 16 Bit

Analog Outputs
You can use the outputs of the Analog Output Module SM 332; AO 4 × 16 Bit as:
S Voltage outputs
S Current outputs
Set the outputs group-wise, using STEP 7 for programming the output type.

Output Ranges
Set the output ranges for the voltage and/or current outputs with STEP 7.
Table 2 lists all the possible output ranges for the Analog Output Module SM 332;
AO 4 × 16 Bit.

Table 2 Output Ranges for Analog Output Module

Selected Type Description Output Range

of Output
Voltage Table 3 and Table 4 show the digital 1 to 5V
analog values in the analog output 0 to 10 V
range. ± 10 V
Current Table 3 and Table 4 show the digital 0 to 20 mA
analog values in the analog output 4 to 20 mA
measuring range. ± 20 mA

Default Settings
The default settings of the module are “Voltage” for the output type and
“± 10 V” for the output range. You can use this combination of output type and
output range without parameterizing the SM 332; AO 4 × 16 Bit in STEP 7.

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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Analog Value Representation of the Output Ranges for the Analog Output
Module SM 332; AO 4
16 Bit

Introduction
The tables in this section contain the digitized analog values for the various output
ranges of the analog output module.

How to Read the Output-Value Tables

Tables 3 and 4 contain the digital analog values for the various ouput ranges.
Since the binary representation for the analog values is always the same, these
tables only contain the output values and the units.

Voltage and Current Output Ranges

Table 3 shows the representation of the digitized output value:
S For the voltage output ranges ±10 V and
S For the current output range ± 20 mA.

Table 3 Representation of the Digital Output Value of the Analog Output Module
(Voltage and Current Output Ranges)

System Word Units Output Range

Output Range
Range ± 20 mA
Decimal Hexadecimal ± 10 V

Overflow 32767 7FFFH 0.0000 0.0000

Overrange 32511 7EFFH 11.7589 23.515
: : : :
27649 6C01H 10.0004 20.0007
Nominal Range 27648 6C00H 10.00 20.000
20736 5100H 7.5 14.998
: : : :
–20736 AF00H –7.5 –14.998
–27648 9400H –10.00 –20.000
Underrange –27649 93FFH –10.0004 –20.0007
: : : :
–32512 8100H –11.7589 –23.515
Underflow –32768 8000H 0.0000 0.0000

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

12 A5E0033348892-01
 Table 4 shows the representation of the digitized output value:
S For the voltage output ranges 1 to 5 V, 0 to10 V and
S For the current output ranges 0 to 20 mA, 4 to 20 mA

Table 4 Representation of the Digital Output Value of the Analog Output Module
(Voltage and Current Output Ranges)

System Word Units Output Output Output Output

Range Range Range Range Range
Decimal Hexadecimal 1 to 5 V 0 to 10 V 0 to 20 mA 4 to 20 mA
Overflow 32767 7FFFH 0.0000 0.0000 0.0000 0.0000
Overrange 32511 7EFFH 5.8794 11.7589 23.515 22.810
: : : : : :
27649 6C01H 5.0002 10.0004 20.0007 20.0005
Nominal 27648 6C00H 5.000 10.00 20.000 20.000
Range 20736 5100H 4.000 7.50 14.998 16.000
: : : : : :

0 0H 1.000 0.000 0.000 4.000

Under- –1 FFFFH 0.9999 0.0000 0.0000 3.9995
range : : : : : :
–6912 E500H 0.0000 0.0000 0.0000 0.0000
Underflow –32768 8000H 0.0000 0.0000 0.0000 0.0000

Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit

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 Product Information S7–300 Analog Output Module SM 332; AO 4 x 16 Bit
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