22
CHAPTER 3 – Inputs - Outputs
SMT-BD2/m
4.1
-
S
PECIFICATION OF THE ANALOG INPUTS
/
OUTPUTS
4.2
-
S
PECIFICATION OF THE LOGIC INPUTS
/
OUTPUTS
When the I/O jumper is open, the 0 V of the optoisolated inputs (X4 pins 23,24,25) is not connected to
the 0 V of the SMT-BD2/m amplifier module (X4, pin 12).
SMT-BD2/m
X4-11
20K
10K
X4-10
20K
10K
X4-2
1K
1K
X4-1,4,7,14,20
SMT-BD2/m
TLP 281
4.1K
X4-23,24,25
100K
10nF
+5V
I/O jumper open
I/O
X4-17
SMT-BD2/m
10K
X4-16
20K
10nF
10K
10K
10K
10nF
22nF
20K
X4-3
10K
X4-15
20K
10K
22nF
10nF
22nF