
BL20
Part Number
Input Count
Pinout
Style
Group
Diagnostics
Individual
Diagnostics
Wire-Break
Detection
I/O Map
BL20-4DI-NAMUR with
BL20-S4*-SBBS**
4 B20-4C NAMUR X 1
* T = Tension clamp
S = Screw clamp
** Base modules sold separately. See page C58 - C61.
Inputs Data
In
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
n–1 (Data from modules to the left)
n S-3 S-2 S-1 S-0 I-3 I-2 I-1 I-0
n+1 (Data from modules to the right)
I/O Data Map 1
B20-4C
Note: S = status bit
Input Connectors
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