Table of Contents
Advertisement
Pin assignment of bottom 14-pin screw terminal block (I-7522A
/I7522AD):
Pin Name Description
1
DO
100 mA, 30V max. DO1
2
DI
3.5V ~ 30V,DI1
3
D1+
DATA+ pin of COM1 (RS-485)
4
D1-
DATA - pin of COM1 (RS-485)
5
CTS1 Clear To Send of COM1 (RS-232)
6
RTS1 Request To Send of COM1 (RS-232)
7
GND
Signal ground of RS-232
8
TXD1 Transmits Data of COM1 (RS-232)
9
RXD1 Receives Data of COM1 (RS-232)
10 INIT* Initial pin, 3.5V ~ 30V
11 D2+
DATA+ pin of COM2 (RS-485)
12 D2-
DATA - pin of COM2 (RS-485)
13 +VS
V+ of power supply (+10 to +30VDC unregulated)
14 GND
GND of power supply
Note: The COM1 can be used as a RS-232 port or a RS-485 port. It is
not recommended to use both RS-232 and RS-485 at the same time.
Pin assignment of top 14-pin screw terminal block:
15 TXD3+ TXD+ pin of COM3 (RS-422/RS-485)
16 TXD3- TXD - pin of COM3 (RS-422/RS-485)
17 RXD3+ RXD+ pin of COM3 (RS-422)
18 RXD3- RXD - pin of COM3 (RS-422)
19 DI0
Digital Input, 3.5V ~ 30V, DI2
20 DI1
Digital Input, 3.5V ~ 30V, DI3
21 DI2
Digital Input, 3.5V ~ 30V, DI4
22 DI3
Digital Input, 3.5V ~ 30V, DI5
23 GND
GND of Digital Output
24 PWR
Power of Digital Output
25 DO0
Digital Output, 100 mA, 30V max., DO2
26 DO1
Digital Output, 100 mA, 30V max., DO3
27 DO2
Digital Output, 100 mA, 30V max., DO4
28 DO3
Digital Output, 100 mA, 30V max., DO5
I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User's Manual,Ver2.5 Aug.2015
16
Advertisement
Table of Contents
