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B&B Electronics RS-485 Digital I/O Module 485SDD16, User Manual

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485SDD16-1005 Manual 

Cover Page 

B&B Electronics  --  707 Dayton Road  --  Ottawa, IL  61350 

PH (815) 433-5100  --  FAX (815) 433-5104

 

 
 
 
 
 
 
 
 
 

RS-485 Digital I/O Module 

Model 485SDD16 

Document ation Number  485SDD16-1005 

pn#3605-r1 

 

 
 

This product 

Designed and Manufactured 

In Ottawa, Illinois 

USA 

of domestic and imported parts by 

 

B&B Electronics Mfg. Co. Inc. 

707 Dayton Road  --  P.O. Box 1040  --  Ottawa, IL  61350 

PH (815) 433-5100  --  FAX (815) 433-5104 

 
 
 

Internet: 

http://www.bb-elec.com 

[email protected] 

[email protected] 

 
 
 
 
 
 

 B&B Electronics  --  Revised February 2005 

 

Summary of Contents for RS-485 Digital I/O Module 485SDD16

Page 1: ...Document ation Number 485SDD16 1005 pn 3605 r1 This product Designed and Manufactured In Ottawa Illinois USA of domestic and imported parts by B B Electronics Mfg Co Inc 707 Dayton Road P O Box 1040 O...

Page 2: ...Chapter 4 I O Interfacing 17 Digital Inputs 17 Digital Outputs 19 ii Table of Contents 485SDD16 1005 Manual B B Electronics 707 Dayton Road Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Chapter 5 S...

Page 3: ...utomatically detects baud rates from 1200 to 9600 A data format of 8 data bits 1 stop bit and no parity is used Configuration parameters are stored in non volatile memory These parameters consists of...

Page 4: ...es 256 Factory default 48 decimal Turn around Delay Software programmable from 0 to 255 character transmission times Factory default 1 Baud Rate 1200 to 9600 automatic detection Format 8 data bits 1 s...

Page 5: ...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 automatical...

Page 6: ...ly Connections Power to the 485SDD16 must be supplied by an external power supply connected to the 12Vdc and GND terminal blocks or to the I O connector An external power supply must be able to supply...

Page 7: ...have a numeric value of zero but has a value of 48 The decimal and hexadecimal equivalents of some ASCII characters are shown in Table 3 2 Some commands require additional data bytes to complete the...

Page 8: ...The Read I O Lines command returns two data bytes that reflect the state of the I O lines The first data byte contains the most significant I O lines 15 8 The second data byte contains the least sign...

Page 9: ...racter transmission time The turn around delay can be computed as follows character time 1 baud rate 10 turn around delay character time data byte Command addr SC Argument turn around delay Response n...

Page 10: ...he eight most significant I O lines 15 8 and the eight least significant I O lines 7 0 respectively If a bit position is set to a 0 the I O line is defined as an input if set to a 1 the I O line is de...

Page 11: ...re used to sense a HIGH or a LOW state This can be accomplished via switch closures contact closures or a solid state digital signal When an I O line defined as an input senses a voltage level above 2...

Page 12: ...l solid state output modules CMOS and TTL logic circuits Caution must be taken not to exceed the power capability of the outputs Refer to the output specifications in Chapter 1 Setting an output line...

Page 13: ...or LSIO with the appropriate mask of an I O line the status of the I O line can be determined If the status is equal to zero the I O line is LOW If the status is not equal to zero the I O line is HIG...

Page 14: ...nd power up state of I O lines 2 10 of module 5 24 485SDD16 1005 Manual B B Electronics 707 Dayton Road Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Maddr 5 mask H4 Cmnd CHR Maddr RC PRINT 1 Cmnd...

Page 15: ...1 HIGH and the I O line will be defined as an Output 26 485SDD16 1005 Manual B B Electronics 707 Dayton Road Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Step 1b Define an I O line as an Input MS...

Page 16: ...requires a data byte The data byte is used to specify the new address of the module Step 1 Construct the command string Cmnd CHR Maddr SA CHR Naddr Where Maddr if the module s current address and Nadd...

Page 17: ...s an illustration of how to send and receive commands from the 485SDD16 NOTE This is a demonstration program only and not intended for system applications Running Demonstration Program Before you can...

Page 18: ...433 5100 FAX 815 433 5104 Decimal ASCII 0 NUL 1 SOH 2 STX 3 ETX 4 EOT 5 ENQ 6 ACK 7 BEL 8 BS 9 HT 10 LF 11 VT 12 FF 13 CR 14 SO 15 SI 16 DLE 17 DC1 18 DC2 19 DC3 20 DC4 21 NAK 22 SYN 23 ETB 24 CAN 25...

Page 19: ...87 W 88 X 89 Y 90 Z 91 92 93 94 95 _ 96 97 a 98 b 99 c 100 d 101 e 102 f 103 g 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o 112 p 113 q 114 r 115 s 116 t 117 u 118 v Decimal ASCII 119 w 120 x 121...

Page 20: ...h each decimal symbol having a value from 0 to 9 The hexadecimal base 16 numbering system represents each position in successive powers of 16 with each hex symbol having a value of 0 to 15 Since each...

Page 21: ...decimal symbol Example Convert 10FC hexadecimal to decimal 10FC hex equals 4348 decimal Decimal to Hexadecimal Conversion Example Convert 4348 decimal to hexadecimal 4348 decimal equals 10FC hexadecim...

Page 22: ...nnector Each of the twenty five pins on the connector is brought out to a terminal block Refer to Table C 1 Dimensions 0 5 x 2 1 x 4 3 An enclosure for the DTB25 is available Figure C 1 DTB25 Outline...

Page 23: ...5SDD16 1005 Manual B B Electronics 707 Dayton Road Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Table C 2 DBM16 I O Connections T B 1 Label Function T B 2 Label Function I O7 I O Line 7 I O8 I O L...

Page 24: ...ignals Each DBM16 input is pulled up through a resistor and will be read as a logic 1 HIGH by the SDD16 module When an input on the DBM16 is grounded below 1 5Vdc a logic 0 LOW will be read by the SDD...

Page 25: ...aces Figure C 7 Solid State Output Figure C 8 Isolated Mechanical Output C 8 Appendix C 485SDD16 1005 Manual B B Electronics 707 Dayton Road Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Figure C 9...

Page 26: ...C 9 B B Electronics 707 Dayton Road Ottawa IL 61350 PH 815 433 5100 FAX 815 433 5104 Figure C 10 DBM16 Schematic C 10 Appendix C 485SDD16 1005 Manual B B Electronics 707 Dayton Road Ottawa IL 61350 P...

Page 27: ...85SDD16 receives an communication error on a data byte I O byte for Read Digital command or state byte for Set Output State command the command will be executed since the unit has no way of knowing th...

Page 28: ...elay addr SC x x no response Define I O Lines addr SD I O msb I O msb I O msb I O msb no response Set Power up States addr SS I O msb I O msb I O lsb I O lsb no response Read Configuration addr RC I O...

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