TPM
SPC-3000 User Manual
49
5.5. CN1 Isolated 8DI/8DO
Figure 5-8:
Isolated DI/O
The SPC-3221 offers a 16-bit DIO (8-DI / 8-DO) SCSI-20 pin connector on the bottom side of I/O interface.
Each bit of DI and DO equipped with a photo-coupler for isolated protection. The pin assignments are
shown in the following table:
Pin No.
Definition
Description
Pin No.
Definition
Description
1
EXT_IN0
GPIO Input 0
11
EXT_OUT0
GPIO Output 0
2
EXT_IN1
GPIO Input 1
12
EXT_OUT1
GPIO Output 1
3
EXT_IN2
GPIO Input 2
13
EXT_OUT2
GPIO Output 2
4
EXT_IN3
GPIO Input 3
14
EXT_OUT3
GPIO Output 3
5
EXT_IN4
GPIO Input 4
15
EXT_OUT4
GPIO Output 4
6
EXT_IN5
GPIO Input 5
16
EXT_OUT5
GPIO Output 5
7
EXT_IN6
GPIO Input 6
17
EXT_OUT6
GPIO Output 6
8
EXT_IN7
GPIO Input 7
18
EXT_OUT7
GPIO Output 7
9
DI_COM
GPIO COM
19
Reserved
NC
10
EGND
GPIO GND
20
E24V
External 24V DC
Figure 5-9:
Pin Definition of the 8DI/DO
Digital GPIO output signal circuit in SINK mode (NPN) is illustrated as follows.
Figure 5-10:
Signal circuit of output NPN
Digital GPIO input signal circuit in SINK mode (NPN) is illustrated as follows.
