B&B Electronics RS-232 Digital Relay I/O 232DRIO - Manual (Page 9)

232DRIO-0308 Manual 7
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Table 2.1 - 232DRIO Terminal Blocks
Blue
Pin #
Function Black
Pin #
Function
1 - Ground Input Power 1 Opto-Isolated Input
2 +12Vdc Input Power 2 Opto-Isolated Input
3 #2 N/C-Normally Closed Non-polarized
4 #2 N/O-Normally Opened 0-30 Vdc/Vac
5 #2 C-Common
6 #1 C-Common
7 #1 N/C-Normally Closed
8 #1 N/O-Normally Opened
Serial Port Connections
In order to communicate to the 232DRIO module it must be
connected to an RS-232 serial port. The unit is designed for a baud
rate of 9600, so the serial port must be set for this rate. A data
format of 8 data bits, 1 stop bit and no parity is used.
The 232DRIO
is configured as a DCE device (See Table 2.2). If your
communications equipment is configured as a DTE device, such as
a standard IBM PC serial port, the 232DRIO should be connected
using a “straight through” DB-25 cable or a standard DB-9 to DB-25
cable adapter as shown in Table 2.3. If your communications
equipment is configured as a DCE device, such as a modem, the
232DRIO should be connected using a “null modem” cable (see
Table 2.4).
Table 2.2 – RS232 Connector Pinout
DB-9S
Pin #
Signal Signal
Direction at
232DRIO
Notes
2 Receive Data (RD) Output Required
3 Transmit Data (TD) Input Required
5 Signal Ground (SG) ------ Required
9 Power pin Input Can be wired to
power unit