B&B Electronics 485SDD16 사용자 설명서
485SDD16-1005 Manual
5
B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Chapter 2 - Connections
This chapter will cover the connections required for the
485SDD16. There are three sets of connections: digital I/O, serial
port, and power supply. Do not make any connections to the
485SDD16 until you have read this chapter.
port, and power supply. Do not make any connections to the
485SDD16 until you have read this chapter.
Digital I/O Connections
Connections to the I/O lines are made through the DB25S
(female) I/O port connector. Refer to Table 2.1. See Chapter 5 for
I/O interfacing examples.
Digital Inputs
I/O interfacing examples.
Digital Inputs
The digital input lines are CMOS/TTL compatible and can handle
voltages from 0Vdc to +5Vdc.
Digital Outputs
Digital Outputs
The digital output lines have a maximum voltage of +5Vdc and
are CMOS compatible.
Ground
Ground
This pin should be connected to the external digital devices
ground.
Table 2.1 - 485SDD16 I/O Port Pinout
DB-25S
Pin #
Function
DB-25S
Pin #
Function
1
No connection
14
I/O #15
2
No connection
15
I/O #14
3
No connection
16
I/O #13
4
No connection
17
I/O #12
5
No connection
18
I/O #11
6
No connection
19
I/O #10
7 Ground
20 No
connection
8
+12Vdc Input
21
I/O #9
9 I/O
#0
22 I/O
#8
10 I/O
#1
23 I/O
#7
11 I/O
#2
24 I/O
#6
12 I/O
#3
25 I/O
#5
13 I/O
#4
6 485SDD16-1005
Manual
B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Serial Port Connections
In order to communicate to the 485SDD16 module it must be
connected to an RS-422/RS-485 serial port. The 485SDD16 will
work on a 2-wire or 4-wire RS-485 multi-node network. Refer to
B&B Electronics’ free RS-422/485 Application Note for more
information. The unit automatically detects baud rates from 1200 to
9600. A data format of 8 data bits, 1 stop bit and no parity is used.
Connections are made using terminal blocks. Table 2.2 shows the
terminal blocks and their functions.
work on a 2-wire or 4-wire RS-485 multi-node network. Refer to
B&B Electronics’ free RS-422/485 Application Note for more
information. The unit automatically detects baud rates from 1200 to
9600. A data format of 8 data bits, 1 stop bit and no parity is used.
Connections are made using terminal blocks. Table 2.2 shows the
terminal blocks and their functions.
A typical 2-wire RS-485 connection is shown in Figure 2.3 and a
typical RS-422 (or RS-485 4-wire) connection is shown in Figure
2.4. Note that the 485SDD16 data line labels use “A” and “B”
designators (per EIA RS-485 Specification). However, some RS-485
equipment uses “+” and “-“ as designators. In almost all cases, the
“A” line is the equivalent of the “-“ line and the “B” is the equivalent of
the “+” line. With an RS-485/422 system there are other factors that
require consideration, such as termination and turn-around delay.
For more information refer to B&B Electronics’ free RS-422/485
Application Note.
2.4. Note that the 485SDD16 data line labels use “A” and “B”
designators (per EIA RS-485 Specification). However, some RS-485
equipment uses “+” and “-“ as designators. In almost all cases, the
“A” line is the equivalent of the “-“ line and the “B” is the equivalent of
the “+” line. With an RS-485/422 system there are other factors that
require consideration, such as termination and turn-around delay.
For more information refer to B&B Electronics’ free RS-422/485
Application Note.
Table 2.2 - RS-485 Terminal Block Connections
TB
Label
Signal
Signal
Direction at
485SDD16
Notes
FR
GND
Frame
Ground
Ground
-
Connection for frame ground.
TD(A) Transmit
Data (A)
Output
Connection is required. [Loop to
RD(A) for 2-wire hookup]
RD(A) for 2-wire hookup]
TD(B) Transmit
Data (B)
Output
Connection is required. [Loop to
RD(B) for 2-wire hookup]
RD(B) for 2-wire hookup]
RD(A) Receive
Data (A)
Input
Connection is required. [Loop to
TD(A) for 2-wire hookup]
TD(A) for 2-wire hookup]
RD(B) Receive
Data (B)
Input
Connection is required. [Loop to
TD(B) for 2-wire hookup]
TD(B) for 2-wire hookup]
+12V +12
Vdc
Power
Input Connection
is
required.
GND
Ground
-
Connection for Signal GND and
Power Supply GND.
Power Supply GND.