Digital Input Modules SM 521
The modules have high channel density and low parts variance. As a result, ordering, logistics and spare-parts inventory are considerably simplified.
High Feature modules with enhanced functionality are only available with the 35mm form factor. Modules with a width a width of 35 mm can be equipped with a front connector using screw terminal or push-in technology, the connector has to be ordered separately.
The narrow 25mm modules use a front connector with push-in technology which is included in the scope of delivery. The modules have the same mechanical structure as the 35 mm modules. They also offer the same operability and the same accessories. Moreover, the pin assignment in the wiring is unchanged. This means that circuit and wiring diagrams can be universally used.
The narrow, low-cost modules do not have any parameter assignment or diagnostics, so integration in the engineering is significantly easier.
The narrow 25 mm modules can be mixed with the 35 mm modules as required.
SM 521 DI 16x24VDC HF
High Feature digital input module with 16 channels for recording 24 V DC signals
-
sinking input
-
one potential group
-
input delay 0.05 ... 20 ms
-
input type 3 (IEC 61131)
-
parameterizable diagnostic and process alarms
-
counting with DI
-
Article No.: 6ES7521-1BH00-0AB0
SM 521 DI 32x24VDC HF
High Feature digital input module with 32 channels for recording 24 V DC signals
-
sinking input
-
two potential groups
-
input delay 0.05 ... 20 ms
-
input type 3 (IEC 61131)
-
parameterizable diagnostic and process alarms
-
counting with DI
-
Article No.: 6ES7521-1BL00-0AB0
SM 521 DI 16x24....125 VUC HF
High Feature digital input module with 16 channels for recording 24... 125 V universal current signals
-
16 potential groups
-
sinking input
-
input delay 0.05 ... 20 ms DC / 20ms fixed AC
-
input type 3 (IEC 61131)
-
parameterizable diagnostic and process alarms
-
Article No.: 6ES7521-7EH00-0AB0
SM 521 DI 16x24VDC SRC BA
Basic digital input module with 16 channels for recording 24 V DC signals
-
active low
-
one potential group
-
fixed input delay 3.2 ms
-
input type 3 (IEC 61131)
-
Article No.: 6ES7521-1BH50-0AA0
SM 521 DI 16x230VAC BA
Basic digital input module with 16 channels for recording 230 V AC signals
-
four potential groups
-
sinking input
-
input delay 20 ms
-
input type 1 (IEC 61131)
-
Article No.: 6ES7521-1FH00-0AA0
Digital Input Modules with a width of 25 mm
SM 521 DI 16x24VDC BA
Basic digital input module with 16 channels for recording 24 V DC signals
-
sinking input
-
one potential group
-
fixed input delay 3.2 ms
-
input type 3 (IEC 61131)
-
Article No.: 6ES7521-1BH10-0AA0
SM 521 DI 32x24VDC BA
Basic digital input module with 32 channels for recording 24 V DC signals
-
sinking input
-
one potential group
-
fixed input delay 3.2 ms
-
input type 3 (IEC 61131)
-
Article No.: 6ES7521-1BL10-0AA0