Black Box IC237A, IC486A, IC487A-F, IC482A User Manual

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JUNE 1995 IC237A IC486A IC482A IC487A-F

Non-Powered Interface Converters

RS-232 to RS-530

RS-422 to V.35

RS-232 to RS-485

RS-232 to RS-422/RS-449

CUSTOMER SUPPORT INFORMATION

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com

NON-POWERED INTERFACE CONVERTERS

Contents

Chapter Page

1. Specifications..........................................................1

1.1 IC237A.............................................................1

1.2 IC482A.............................................................2

1.3 IC486A.............................................................4

1.4 IC487A-F..........................................................6

2. Introduction ...........................................................8

2.1 IC237A.............................................................9

2.2 IC482A...........................................................10

2.3 IC486A...........................................................11

2.4 IC487A-F........................................................13

3. Installation............................................................14

3.1 IC237A...........................................................14

3.2 IC482A...........................................................18

3.3 IC486A...........................................................19

3.4 IC487A-F........................................................24

NON-POWERED INTERFACE CONVERTERS

1.1 IC237A

Interface A — RS-232/V.24/V.28, DTE/DCE

selectable

Connectors — DB25 male Distance — Direct connection to

RS-232/V.24 device

Interface B — RS-530 (RS-422), DTE/DCE

selectable

Connectors — DB25 female Distance — Direct connection

to RS-530 device

Transmission Format — Synchronous/asynchronous,

transparent to protocol

Data Rates — Up to 200 Kbps

Cable — 6.5 ft. (2 m)

Input Voltage — Standard RS-232/V.24 driver

±12 volts

1. Specifications

NON-POWERED INTERFACE CONVERTERS

Operating Temperature — 32° to 122°F (0° to 50°C)

Humidity — Up to 90%, noncondensing

Power — No AC power required

Size — 0.9"H x 2.1"W x 4.3"D

(2.3 x 5.3 x 10.9 cm)

Weight — 14 oz. (397 g), including cable

and connector

1.2 IC482A

Interface A — V.35, DTE only

Connectors — V.35 (M-block) male Distance — Direct connection to V.35

device

Interface B — RS-449/V.36/V.11 (RS-422),

DCE only

Connectors — DB37 female Distance — Direct connection to

RS-449/V.36 device

NON-POWERED INTERFACE CONVERTERS

Transmission Format — Synchronous, transparent

to protocol

Data Rates — Up to 2.048 Mbps

Cable — 6.5 ft. (2 m)

Input Voltage — Standard RS-422 and V.35

drivers

Operating Temperature — 32° to 122°F (0° to 50°C)

Humidity — Up to 90%, noncondensing

Power — No AC power required

Size — 0.9"H x 2.1"W x 4.3"D

(2.3 x 5.3 x 10.9 cm)

Weight — 14 oz. (397 g), including

cable and connector

NON-POWERED INTERFACE CONVERTERS

1.3 IC486A

Interface A — RS-232, DCE

Connectors — DB25F Distance — Direct connection

to RS-232 device

Interface B — RS-422/485

Connectors — (5) screw terminals Distance — Up to 3.75 miles (6 km)

Transmission Format — Asynchronous only

(data transparent)

Transmission Mode — Full duplex on 4-wire, half-

duplex on 2- or 4-wire

Control Signals — Request to Send (pin 4):

Controls transmit carrier, only if Carrier switch is in the CNTRL switch position); Clear to Send (pin 5): Set by CTS switches to be either open, high or delayed, after RTS; Data Set Ready (pin 6) and

NON-POWERED INTERFACE CONVERTERS

Data Carrier Detect (pin 8): Both are set by the DCD+DSR switch to be either high or open; Data Terminal Ready (pin 20): Should be connected for power considerations only, to constantly on (high).

Carrier Control — The Carrier is strap-selectable

to be either continuously on or switched by RTS.

Data Rates — Up to 38.4 Kbps

Input Voltage — Derived from data and control

or external 6- to 12-VDC 50 mA

Operating Temperature — 32° to 122°F (0° to 50°C)

Humidity — Up to 90%, noncondensing

Power — Derived from data and control

signals. If signal power is insufficient, a 6- to 12-VDC 50-mA external power supply is required. (Call your supplier for more information.)

NON-POWERED INTERFACE CONVERTERS

Size — 0.9"H x 2.1"W x 4.3"D

(2.3 x 5.3 x 10.9 cm)

Weight — 3 oz. (85 g)

1.4 IC487A-F

Interface A — RS-232/V.24/V.28, DTE/DCE

selectable

Connectors — DB25 male Distance — Direct connection to

RS-232/V.24 device

Interface B — RS-449/V.36 (RS-422),

DTE/DCE selectable

Connectors — DB37 female Distance — Direct connection to

RS-449/V.36 device

Transmission Format — Synchronous, transparent to

protocol

Data Rates — Up to 200 Kbps

NON-POWERED INTERFACE CONVERTERS

Cable — 6.5 ft. (2 m)

Input Voltage — Standard RS-232/V.24 driver

±12 volts

Operating Temperature — 32° to 122°F (0° to 50°C)

Humidity — Up to 90%, noncondensing

Power — No AC power required

Size — 0.9"H x 2.1"W x 4.3"D

(2.3 x 5.3 x 10.9 cm)

Weight — 14 oz. (397 g), including cable

and connector

NON-POWERED INTERFACE CONVERTERS

The Non-Powered Interface Converters enable connection between DTE and DCE data- communications equipment with different interfaces. The Converters perform both the physical and electrical conversion between the two interfaces. The circuitry is designed to provide short-range interface conversion.

NOTE

The devices that are to be connected must be within 6 feet (2 m) of each other. If greater distances are required, then an active powered converter must be used.

The Converters operate without AC power, using ultra-low power from the DTE and DCE equipment’s data and control signals. Sections 2.1 through 2.4 provide descriptions and typical applications for each Converter.

2. Introduction

NON-POWERED INTERFACE CONVERTERS

2.1 IC237A

RS-232 to RS-530 (Model No. IC237A) is used for converting between V.24/RS-232 and RS-530 interfaces. It’s switch-selectable and is used either for connecting a V.24/RS-232 DTE to an RS-530 DCE, or for connecting a V.24/RS-232 DCE to an RS-530 DTE.

Fig. 2-1. X and Y interfaces are V.24 (RS-232) and RS-530.

NOTE

The DCE/DTE setting should be set to the type of unit to be connected to, not what the IC237A is to look like.

DTE

DCE

X Interface

Y Interface

Synchronous

modem or

multiplexor

Synchronous

terminal or multiplexor

NON-POWERED INTERFACE CONVERTERS

2.2 IC482A

RS-422 to V.35 (Model No. IC482A) is used for connecting a V.35 DCE device to an RS-422/449/ V.36 DTE device.

Fig. 2-2. X interface is RS-422; Y interface is V.35 only.

V.35 DCE

RS-422 DTE

Synchronous

modem or

multiplexor

Synchronous

terminal or

multiplexor

Y Interface

X Interface

NON-POWERED INTERFACE CONVERTERS

2.3 IC486A

The RS-232 to RS-485 (Model No. IC486A) converts between RS-232/V.24 DTE devices and RS-485 equipment. It also enables multipoint connection of a computer and terminals in a mixed V.24 and RS-485 environment. (See Fig. 2-4.)

This Converter’s carrier can be strapped to be constantly on or can be controlled by the Request to Send signal. Operation with controlled carrier enables connection in a multipoint configuration. The receive pair impedance is selectable for Low (120 ohm) or High (12 kΩ).

To ensure proper operation of the RS-232 to RS-485 Converter, the DTE device should provide the following signals: RTS (pin 4) and DTR (pin 20). If these signals are not available or if they do not provide enough power, then a powered converter is required. (Call your supplier for more information about the IC108A and IC109A.)

NON-POWERED INTERFACE CONVERTERS

Fig. 2-3. Interface converter, V.24/RS-232 to RS-485.

Fig. 2-4. Short-range modem in a multipoint environment.

RS-485 Host

RS-485 Printer

IC486A

RS-485

NON-POWERED INTERFACE CONVERTERS

2.4 IC487A-F

RS-232 to RS-422/RS-449 (Model No. IC487A-F) is used to convert between V.24/RS-232 and V.36/ RS-422 interfaces. It’s switch-selectable either for connecting a V.24/RS-232 DTE to a V.36/RS-442 DCE, or for connecting a V.24 DCE to a V.36 DTE.

Fig. 2-5. X and Y interfaces can be V.24 (RS-232) and V.36.

NOTE

When setting DTE/DCE options, the setting applies to the type of interface connecting to, not what the converter appears as.

Synchronous

modem or

multiplexor

Synchronous

terminal or multiplexor

X Interface

Y Interface

DCE

DTE

NON-POWERED INTERFACE CONVERTERS

3.1 IC237A

The Converter plugs directly into the DTE and the DCE. Connect the Converter directly to the RS-232/V.24 device, and the cable connector to the RS-530 device.

The Converter comes factory-strapped for RS-232 DTE/RS-530 DCE, as shown in Figure 3-1. To change this configuration:

1. Separate the two parts of the plastic cover by pressing the marked places on the sides, starting at the cable end.

2. Remove the 40-pin DTE/DCE socket by gently grasping both sides and slowly moving it from side to side, while pulling up.

3. Turn the socket around and replace it so that the DCE faces the RS-232 connector and the DTE faces the RS-530 device (see Figure 3-2). Make sure the pins are aligned with the socket.

NOTE

The DTE/DCE setting is set for the type of device connecting to, not what the converter is, as is illustrated in Figures 3-3 and 3-4.

3. Installation

NON-POWERED INTERFACE CONVERTERS

4. Close the unit by pressing the two plastic covers together.

Fig. 3-1. RS-232 DTE, RS-530 DCE.

Fig. 3-2. RS-530 DTE, RS-232 DCE.

(DTE) PORT (DCE) MODEM

NON-POWERED INTERFACE CONVERTERS

Fig. 3-3. RS-530 DTE/RS-232 (V.24) DCE Schematic Diagram.

Shield

Proetctive GND

Signal GND

RTS-a

RTS

CTS-a CTS

DSR-a DSR

DTR-a DTR

LSD-a DCD

20 20

RTS-b

CTS-b

DSR-b

DTR-b

LSD-b

TC-a

TC-b

RC-a

RC-b

EXT-TC-a

EXT-TC-b

EXT-TC

TD a

TD-b

RC-a

RC-b

LL NC

RL NC

TM NC

RS-530 (DTE) V.24 (DCE)

R = 100Ω

NON-POWERED INTERFACE CONVERTERS

Fig. 3-4. RS-232 (V.24) DTE/RS-530 DCE Schematic Diagram.

Protective GND

Shield

Signal GND

RTS

RTS-a

CTS CTS-a

DSR DSR-a

DTR

DTR-a

DCD LSD-a

20 20

RS-b

CTS-b

DSR-b

DTR-b

LSD-b

TC-a

EXT-TC

RD-a

LL NC

RL NC

TM NC

V.24 (DTE) RS-530 (DCE)

TC-b

RC-a

RC-b

EXT-TC-a

24 11

EXT-TC-b

TD-a

TD-b

R = 100Ω

RD-b

NON-POWERED INTERFACE CONVERTERS

3.2 IC482A

Installation is simple and straightforward. The Converter plugs directly into the DTE or DCE. No strapping adjustments are required. Connect the 37-pin connector to the RS-449/V.36 device and the other connector to the V.35 device, and it’s ready to operate.

Fig. 3-5. RS-449 (V.36) DTE/V.35 DCE Schematic Diagram.

NOTE

When selecting DTE/DCE options, the setting applies to the type of interface connecting to, not what the converter appears as.

Signal GND

37,20,19

Signal GND

RTS

CTS

DSR

DTR

DCD

RT-a

RT-b

SD-a

RC-b

SD-b

RD-a

TT-a

TT-b

RS-449/V.36 (DTE) V.35 (DCE)

TC-a

RC-a

RS-a

RS-b

CS-b

DM-b

TR-b

RR-b

CS-a

DM-a

TR-a

RR-a

ST-a

TC-b

ST-b

TD-a

TD-b

RD-a

RD-b

EC-a

EC-b

3.3 IC486A

1. Separate the two parts of the plastic cover by firmly pressing the marked places on the sides, starting at the cable end. Connect the RS-485 line to the Converter as follows:

NOTE

The A and B transmit and receive lines are as defined in RS-485. According to this definition A is negative with respect to B for mark and A is positive with respect to B for space. If the RS-485 equipment connecting to is labeled TX+, TX-, etc., connect the plus leads to the “B” connections, and the minus leads to the “A” connections.

For 2-wire operation, two small jumper wires must be used to connect TA to RA (this will connect to the minus line) and TB to RB (this will connect to the plus line).

NON-POWERED INTERFACE CONVERTERS

NOTE

On the unit, up (≠) indicates ON and down (Ø) indicates OFF.

2. Set the internal switches according to Table 3-1.

3. Chassis GND: To connect the chassis ground (pin 1 or RS-232) to signal ground (pin 7 of RS-232), set chassis GND to CON. To disconnect, set to DIS (factory setting).

4. Close the unit by pressing the two halves of the cover together.

5. Power is normally derived from the data and control signals. To ensure proper operation, the DTE should provide the following signals, using standard V.24/RS-232 drivers at ±12 volts:

TD (pin 2), RTS (pin 4), and DTR (pin 20).

If some signals are not available, or if they do not provide enough power, a powered converter must be used. (Call your supplier for more information on products IC108A and IC109A.)

NON-POWERED INTERFACE CONVERTERS

Fig. 3-6. Strapping Diagram for the IC486A.

DIS

CON

CHAS. GND

123456

ON OFF

GND

NON-POWERED INTERFACE CONVERTERS

Table 3-1. Switch Selection

Switch Function Possible Dfn. Factory Identity Positions Setting

DCD+DSR SW1 (SW1) Both signals high. ON ON ON

Both signals OFF NC disconnected.

CTS Status SW2

SW3 SW4

and RTS to CTS not provided. OFF OFF X NC CTS Delay CTS always high. ON OFF X ON

(SW2, 3, 4) CTS follows RTS. OFF ON OFF 0 msec

CTS follows RTS. OFF ON ON 20 msec 20 msec Illegal position! ON ON X Fault Do not use!

Carrier SW5 (SW5) Carrier controlled ON CNTRL CNTRL

by RTS. Carrier always ON. OFF ON

Note: Carrier (SW5) must be in CNTRL position for 2-wire operation.

Receive SW6 Impedance Low ON 120Ω

(SW6) High OFF 12 kΩ OFF Note: For point-to-point connection, the receive impedance should be set to Low. For multipoint connection, the master and terminating units should be set to Low and all the other units to High.

NON-POWERED INTERFACE CONVERTERS

Table 3-2. Optional Connectors

Signal Name RJ-11 Jack RJ-45 Jack

Pin No. Color Pin No.

Signal Ground 1, 6 Blue/Brown 1, 7 Transmit A 2 Black 3 Transmit B 5 Yellow 6 Receive A 3 Red 4 Receive B 4 Green 5

Table 3-3. Approximate Range (When Used

as a Short-Range Modem)

Data Rate 24 AWG (0.5 mm)

1200 10 km 2400 8 km 9600 6 km 19200 4 km

(The line is terminated with 100 ohms at both ends.)

NON-POWERED INTERFACE CONVERTERS

3.4 IC487A-F

The Converter plugs directly into the DCE and the DTE. Connect the Converter directly to the RS-232/V.24 device, and the cable connector to the RS-449 device. The Converter comes factorystrapped for RS-232 DTE/RS-449 DCE, as shown in Figure 3-7. To change this configuration:

1. Separate the two parts of the plastic cover by pressing the marked places on the sides, starting at the cable end.

2. Remove the 40-pin DTE/DCE socket by gently grasping both sides and slowly moving it from side to side, while pulling up.

3. Turn the socket around and replace it so that the DCE faces the RS-232 connector and the DTE faces the RS-449 device (see Figure 3-8). Make sure that the pins are aligned with the socket.

NOTE

When setting DTE/DCE options, the setting applies to the type of interface connecting to, not what the converter appears as.

4. Close the unit by pressing the two plastic covers together.

NON-POWERED INTERFACE CONVERTERS

Fig. 3-7. RS-232 DTE, RS-449 DCE (V.24 DTE, V.36 DCE).

Fig. 3-8. RS-449 DTE, RS-232 DCE (V.36 DTE, V.24 DCE).

(DTE) PORT (DCE) MODEM

NON-POWERED INTERFACE CONVERTERS

Fig. 3-9. RS-449 (V.36) DTE/RS-232 (V.24) DCE

Schematic Diagram.

Shield

Frame GND

Signal GND

19,37,20

Signal GND

RTS

CTS

DSR

DTR

DCD

11 6

12 20

13 8

EXT-TC

LL NC

RL NC

TM NC

V.36 (DTE) V.24 (DCE)

R = 100Ω

ST-a

ST-b

RT-a

RT-b

TT-a

TT-b

SD a

SD-b

RD-a

RD-b

RS-a

CS-a

DM-a

TR-a

RR-a

RS-b

CS-b

DM-b

TR-b

RR-b

NON-POWERED INTERFACE CONVERTERS

Fig. 3-10. RS-232 (V.24) DTE/RS-449 (V.36) DCE

Schematic Diagram (Factory Settings).

Frame GND

Shield

Signal GND

20,37,19

RTS

RS-a

CTS CS-a

DSR DM-a

DTR

TR-a

DCD RR-a

611

20 12

813

RS-b

CS-b

DM-b

TR-b

RR-b

ST-a

EXT-TC

RD-a

LL NC

RL NC

TM NC

V.24 (DTE) V.36 (DCE)

ST-b

RT-a

RT-b

TT-a

17 35

TT-b

SD-a

SD-b

R = 100Ω

RD-b

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746

Black Box IC237A, IC486A, IC487A-F, IC482A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual