B+B SmartWorx SCP211-DFTB3, SCP311T-DFTB3, SCP211T-DFTB3 Quick Start Manual

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QUICK START
GUIDE

Docu ment Nu mber : 710-108 64- 00_SC Px11x-DF TB3 _1017qsg

Recommended Accessories

10-30V DC, 2.5W
Power Supply

#MDR-40-24

DIN Rail Adapter Clips

#DRAD35 (pair)

Before you begin, be
sure you have the following:

RS-232 to RS-422/485

Industrial Converters

SCP211-DFTB3, SCP211T-DFTB3 or SCP311T-DFTB3

+ 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

6

1. In this example, the conver ter 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

120 Ω 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

8

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 LED’s are ON when power is applied.
Using hyper terminal or similar program, connect to the

appropriate COM port. Turn off hyper terminal local echo.

Transmit data. The same data should be returned. When

data is sent and looped back, the TD and RD LED’s blink

On and Off indicating data ow.

Bias & Termination

7

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

#S MI6 -12-V-ST

Product Overview

Specications & Compliances

Control & Indicators

Pinouts & Terminal Identication

1

2

3

SCP211-DFTB3 - Non-isolated, standard temperature
SCP211T-DF TB - Non-isolated, wide temperature
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

A

Power Terminal Block 2-position, removable

B

DB9 Female RS-232 (wired DCE)

C

Data LEDs

Green - ON when power is applied.

Blinking to indicate data ow.

D

Mounting Ears

Use for panel mounting. (Use #DRAD35
adapter clip for DIN rail mounting.)

B

RS-422/485 TB 5-position, removable

8-Position DIP Switch - located on back

(Shown in default conguration.)

DB9 Female Connector

DCE (DB9 FEMALE)

PIN SIGNAL DIRECTION

1 DCD –
2 RD Output
3 TD Input
4 DTR –
5 GND –
6 DSR –
7 RTS –
8 CTS –
9 RI –

RS-422/485 4-WIRE

A Ground

B RDB(+)

C RDA(-)

D TDB(+)

E TDA(-)

RS-422/485 2-WIRE

A Ground

B Data B(+)

C Data A(-)

D –

E –

Power Connection

4

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

5

RS-485 2-Wire DIP Switch

1. In this example, the conver ter is set up to use internal
bias and no termination.

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