B&B Electronics RS-485 Digital I/O Module 485SDD16 - Manual (Page 3)

485SDD16-1005 Manual 1
B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Chapter 1- Introduction
485SDD16 Features
The 485SDD16 is a general purpose control module that
operates through an RS-485 interface. The 485SDD16 offers 16
discrete digital I/O lines. With these features, the module can be
used to sense external ON/OFF conditions and to control a variety
of devices.
Each of the sixteen I/O lines can be defined as either an input or
an output. The digital outputs are CMOS compatible. The digital
inputs are CMOS/TTL compatible. The digital I/O lines are available
through a DB-25S (female) connector.
The 485SDD16 connects to the host computer’s RS-485 or RS-
422 serial port using terminal blocks. The address and turn-around
delay are software programmable to allow for use of multiple
devices or connection to existing multi-node systems. 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.
Configuration parameters are stored in non-volatile memory.
These parameters consists of module address, communication turn-
around delay, I/O definitions, and output power-up states.
The unit is powered by connecting +12Vdc to terminal blocks or
to the DB-25S I/O connector.
Figure 1.1 - 485SDD16 Module
2 485SDD16-1005 Manual
B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Figure 1.2 - Simplified Block Diagram
Packing List
Examine the shipping carton and contents for physical damage.
The following items should be in the shipping carton:
1. 485SDD16 unit
2. Software
3. This instruction manual
If any of these items are damaged or missing contact B&B
Electronics immediately.
485SDD16 Specifications
I/O Lines
Total:
16 (Factory default = inputs)
Inputs
Voltage Range: 0 Vdc to 5 Vdc
Low Voltage: 1.0 Vdc max.
High Voltage: 2.0 Vdc min.
Leakage Current: 1 microamp max.
Outputs
Low Voltage: 0.6 Vdc @ 8.3 milliamps (Sink)
High Voltage: 4.3 Vdc @ -3.1 milliamps (Source)