Advantech BB-SCP211-DFTB3 Manual de usuario

www.advantech.com

707 Dayton Road | PO Box 1040 | Ottawa, IL 61350

Phone:1 (815) 433-5100 | Fax: 1 (815) 433-5109

www.advantech.com | E-mail: support@advantech-bb.com

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GUIDE

Document Number: 20BB710-10864-00_r1_BB-SCPx11x-DFTB3_1120qsg

Recommended Accessories

10-30V DC, 2.5W

Power Supply

# BB-MDR-40-24

Before you begin, be

sure you have the following:

RS-232 to RS-422/485

Industrial Converters

Models BB-SCP211-DFTB3 or BB-SCP311T-DFTB3

+ BB-SCPx11x-DFTB3 Converter

+ Quick Start Guide (included)

+ 10-30V DC, 2.5W Power Supply

(not included)

Wiring Examples: RS-422 4-Wire

& RS-485 4-Wire

1. In this example, the converter is set up to use internal

bias and no termination.

RS-422 4-Wire DIP SwitchRS-485 4-Wire DIP Switch

2. If Termination is necessary on the receive lines, a built in

120Ω resistor can be switched in using DIP Switch Position

6. In most cases, termination is not required. The default

setting is OFF (termination “out”.)

a. Termination is used to match impedance of a node to the

impedance of the transmission line being used. Termination

increases load on drivers, increases installation complexity,

changes biasing requirements and makes system

modication more difcult. Generally, termination should

only be used for long distances. “If in doubt, leave it out.”

Loop-back Test/Troubleshooting

Congure for RS-485 4-wire.

Jumper terminals B to D and C to E.

Connect a PC to the RS-232 port.

TD and RD LEDs are ON when power is applied.

Using HyperTerminal or similar program, connect to the

appropriate COM port. Turn off HyperTerminal Local Echo.

Transmit data. The same data should be returned. When

data is sent and looped back, the TD and RD LEDs blink

On and Off indicating data ow.

Bias & Termination

1. The circuit can be biased using the built in 1 kΩ pull-up

and pull-down resistors. This is controlled with DIP Switch

Position 5. The default setting is ON (bias resistors “in.”)

a. When an RS-485 network is in an idle state, all nodes are

in listen (Receive) mode. Under this condition, there are

no active drivers on the network. All drivers are tri-stated.

Without anything driving the network, the state of the line

is unknown. If the voltage level at the receiver’s A and B

inputs is less than ±200mV, the logic level at the output of

the receivers will be the value of the last bit received. In

order to maintain the proper idle voltage state, bias resistors

must be applied to force the data lines to the idle condition.

12V DC, 6W, Int’l AC Input,

Stripped/Tinned

Power Supply

# BB-SMI6-12-V-ST

Product Overview

Specications & Compliances

Control & Indicators

Pinouts & Terminal Identication

BB-SCP211-DFTB3 - Non-isolated, standard temperature

BB-SCP311T-DFTB3 - 2kV isolation, wide temperature

UL Installation Information:

• One Conductor Per Terminal

• Use Copper Wire Only

• Wire Size: 28 to 16 AWG

• Tightening Torque: 5 KG-CM

• Wire Temperature Rating: 105 °C minimum

(sized for 60 °C Ampacity)

• Surrounding Ambient Air Temperature: +80 °C max.

Product Features

APower Terminal Block 2-position, removable

BDB9 Female RS-232 (wired DCE)

CData LEDs Green - ON when power is applied.

Blinking to indicate data ow.

DMounting Ears

Use for panel mounting. (Use #

BB-DRAD35 adapter clip for DIN rail

mounting.)

BRS-422/485 TB 5-position, removable

8-Position DIP Switch - located on back

(Note: shown in default conguration.)

DB9 Female Connector DCE (DB9 Female)

PIN SIGNAL DIRECTION

1DCD –

2RD Output

3TD Input

4DTR –

5GND –

6DSR –

7RTS –

8CTS –

9RI –

RS-422/485 4-Wire

AGround

BRDB(+)

CRDA(-)

DTDB(+)

ETDA(-)

RS-422/485 2-Wire

AGround

BData B(+)

CData A(-)

D–

E–

Power Connection

1. Connect your external power supply to the 2-position

power terminal block (A). Polarity is indicated on the

front label. The converter will accept 10 to 30 V DC,

2.5W maximum.

2. The terminal block will accept 28 to 12 AWG wire.

Wiring Example: RS-485 2-Wire

RS-485 2-Wire DIP Switch

1. In this example, the converter is set up to use internal

bias and no termination.

(NOTE: this is the default factory/shipping conguration.)

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