Digital modules
8.3 SM 326; DI 24 x DC 24V
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
85
Wiring scheme for application 2 with single-channel connection of two redundant sensors
Two redundant sensors are wired to a single channel at the two analog modules for each
process signal. The sensors can also be connected to an external sensor supply.
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9V
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9V
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60
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Figure 8-9
Wiring scheme of the SM 326; DI 24 x DC 24V for application 2 – two redundant sensors
single-channel connection
Assignable parameters for application 2
Table 8- 3
Parameters for application 2 of SM 326; DI 24 x DC 24V
Parameters
Range of values in standard mode
Type
Effective range
"Parameters" tab
Mode of operation
Standard mode
static
module
Module parameters:
Diagnostic interrupt
activated/deactivated
static
module
Module parameters for a power supply group:
Internal sensor supply
of the module
deactivated (for single-channel
connection of a sensor)
activated/deactivated
(for redundant sensor)
static
Power supply group
Short-circuit test
activated/deactivated * (only if "Sensor
Supply via Module" is activated)
static
Power supply group
For single channels or channel pairs:
activated
activated/deactivated
static
channel
"Redundancy" tab **
Redundancy
2 modules
static
module
Redundant module
(selection of an existing additional
module of the same type)
static
redundant module
pair
Discrepancy time
10 ms to 30000 ms
static
redundant module
pair
Содержание Simatic S7-300
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