ICP DAS USA I-7188XA Series User Manual page 11

10 INIT*
11 D2+
12 D2-
13 +VS
14 GND
Note: COM3 and COM4 share the same GND pin (pin 7).
The pin assignment for the COM1 connector (DB-9 Male) is as below:
Pin Name
1 DCD
RXD
2
D1+
TXD
3
D1-
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Note: COM1 can be used as either an RS-232 or RS-485 port and is
selected using jumper JP6. Refer to Section 1.4.5 for more details
regarding JP6 settings. If JP6 is set to RS-232, the COM1 connector is
the same as the DB-9 RS-232 connector of the Host PC. If JP6 is set to
RS-485, COM1 can drive I-7000 series modules directly. For wiring
connection details, please refer to Section 1.4.5.
I-7188XA Series User's Manual ( Ver1.2, Feb/2014, 7MH-019-10 ) --- 11
Initial pin
DATA+ pin for COM2 (RS-485)
DATA- pin for COM2 (RS-485)
V+ of power supply (+10 to +30V/DC, unregulated)
GND for the power supply
DB9-Male (COM1)
Description
Data Carrier Detect (RS-232)
Receive Data (Use JP6 to select RS-232)
DATA+ for RS-485 (Use JP6 to select RS-485)
Transmit Data (Use JP6 to select RS-232)
DATA- for RS-485 (Use JP6 to select RS-485)
Data Terminal Ready (RS-232)
Signal ground for RS-232
Data Set Ready (RS-232)
Request To Send (RS-232)
Clear To Send (RS-232)
Ring Indicator (RS-232)