KEYENCE N-48, N-42 User Manual

Instruction
Manual

Power Supply Unit For BL Series

N-42
N-48

(with RS-232C/RS-422A conversion)

(with RS-485 multi-drop link)

1

CONTENTS

WARNING

CAUTION

Part Names ....................................................... 4

System Configuration........................................ 5

Connecting the Power Supply........................... 7

Input/output Connections .................................. 8

Clips Used for Terminals ................................... 9

Terminator Switch ............................................. 9

Connecting the BL Series ............................... 10

Connecting the Communication Interface....... 11

Using N-42 as RS-232C/RS-422A Converter . 14

Installation ....................................................... 16

Specifications .................................................. 17

Dimensions ..................................................... 18

SAFETY PRECAUTIONS

This manual describes how to install the N-42/N­48 as well as its operating procedures and
precautions. Please read this manual carefully to
get the best from your N-42/N-48.

Safety precautions

Symbols

The following symbols alert you to important
messages. Be sure to read these messages
carefully.

Failure to follow instructions
may lead to injury. (electric
shock, burn, etc.)

CAUTION

This is a class B (EN55011 and EN55022: EMI
standard) product.
This is also a class A (EN55011 and EN55022:
EMI standard) product.

2

Note:

Failure to follow instructions
may lead to product
damage.

Additional information on
proper operation.

SAFETY PRECAUTIONS

CAUTION

General precautions

• At startup, be sure to check the functions and
performance of the N-42/N-48.

• We recommend that you take substantial
safety measures to avoid any damage in the
event a problem occurs.

• Do not open or modify the N-42/N-48 or use it
in any way other than described in the
specifications.

• When the N-42/N-48 is used in combination
with other instruments, functions and perfor­mance may be degraded, depending on the
operating conditions and the surroundings.

• Do not use the N-42/N-48 for the purpose of
protecting the human body.

Cautions Specific to the N-42/N-48

To use this power supply unit, observe the
following instructions:

• This unit uses a 24 VDC power supply.
Using a power supply exceeding 24 VDC or
using an AC power supply may damage the
unit.

• This unit is a precision instrument. Before
installing the unit, read the “INSTALLATION”
section carefully for correct mounting
instructions.

• Since this unit is a precision instrument, it
may be damaged if it is dropped. Be careful
when carrying and mounting the unit.

• Do not disassemble this unit. If the unit is
disassembled, we may not accept an order to
repair it.

3

PART NAMES

The following parts identification is common for
both the N-42 and N-48.

2 TRIGGER input
terminals

3 OK/NG output
terminals

4

1 READER port

READER

POWER SD RD

4

Power supply/interface

terminal block

5 Terminator switch

6 Communication status

indicator LEDs
7 POWER LED

No. Name Function

1 READER port Connects to a BL series

or RS-232C equipment.

2 TRIGGER Connect to a sensor for

input terminals trigger input.

3 OK/NG output Output OK/NG signals.

terminals

4 Power supply/ The 24 VDC power supply

interface terminal and
terminal block communication interface

(RS-422A or RS-485)
terminal are provided.

5 Terminator Turns ON/OFF the

switch terminator (termination

resistor: 100Ω).

6 Communication Indicates the RS-422A or

status indicator RS-485 communication
LED status.

7 POWER LED Lights when the power

is turned ON.

SYSTEM CONFIGURATION

■ N-42

BL series or RS-232C equipment

READER port

Sensor for trigger input

PLC

Trigger
input

OK/NG
output

N-42

POWER SD RD

N-42

READER

Maximum extension distance: 1.2 km

RS-422A
equipment

RS-422A

• When the N-42 is used as an RS-232C/RS-422A converter, connect the RS-232C equipment to the
READER port of the N-42.

• Turn ON the terminator of both the N-42 and the RS-422A equipment (termination resistor: 100 Ω).

5

SYSTEM CONFIGURATION

■ N-48

The following diagram shows the system configuration that uses the N-400 multi-drop unit as the
master unit and drives the BL series bar code readers in multi-drop link mode. For details of the multi­drop link, see the N-400 User’s Manual.

Sensor for
trigger input

BL series

• Maximum number of
connectable units: 31

• Maximum total extension
distance: 1.2 km

N-400

RS-232C

N-48

*

*

RS-485

Host

• Only the BL-500/180 series enables the multi-drop link connection through the N-400 as shown
above.

• Turn ON the terminator of the equipment marked with an * in the above diagram (termination
resistor: 100 Ω) .

6

CONNECTING THE PO WER SUPPLY

24V DC OUT

24V DC IN

RS-485

24 VDC

++

+

––

SG + –

■ N-42

N.C. N.C. N.C.

24V DC IN
++–

24 VDC

■ N-48

Connect a 24 VDC power supply to the 24 V DC IN terminal.
Since the 24 V DC IN and 24 V DC OUT terminals are connected internally, the 24 V DC OUT terminal
can be used as a 24 VDC power output terminal.

CAUTION

• Make sure that a 24 VDC power supply is connected. Using any other power supply may damage
the unit.

• Do not connect power supplies with different voltages to the 24 V DC IN and 24 V DC OUT
terminals. The potential difference between both power supplies may cause abnormal operation.

If your system must meet the UL standards, use a “NEC CLASS 2” power supply for supplying 24
VDC power to these units.

7

INPUT/OUTPUT CONNECTIONS

The following I/O connections are common for
both the N-42 and N-48.

■ Connecting trigger input

The trigger input allows the BL series to start
reading bar codes. The trigger input turns ON
when 15 to 26 VDC input is activated.

Contact or
solid-state

15 to 26 VDC

8

TIM

COM

■ Connecting OK/NG output

The BL series uses OK/NG output to compare
the read data with the preset data, or to judge
whether a bar code can be correctly read.

OK

Load

NG

Load

Internal circuit

* Rated load: 30 VDC (100 mA)
* The above circuit diagram shows OK output

COM

only. NG output is provided in the same way.

Internal circuit

CLIPS USED FOR TERMINALS

To connect the power supply, trigger input and
OK/NG output, you can use the wire-pin clips, as
shown below.

TERMINATOR SWITCH

To connect the N-42/N-48 to RS-422A/RS-485
equipment, turn ON the terminator of the
equipment at both ends of the connection
[marked with * in the system configuration
diagram on p. 6] (termination resistor: 100Ω).

2.0 mm
max.

6 mm min

5 mm max.

<Recommended terminal>

Manufacturer: Japan Solderless Terminal
Mfg.Co.
Model: VTUB-1.25

* The terminator switch is factory-set to OFF.

ON

OFF

9

CONNECTING THE BL SERIES

Connect the BL series to the READER port of
the N-42/N-48.

BL Series

READER

POWER SD RD

N-42,N-48

N-42

10

READER port pin assignment

1234

D-sub 9-pin (male)

5

DCE specification (defined as
terminal)

6789

Pin Code Description Signal

No. direction

1 TIM Trigger Output
2 RD (RXD) Send Data Output
3 SD (TXD) Receive Data Input
4 OK OK Input
5 GND (SG) Ground (common to

6 NG NG Input
7 RS (RTS) Request to send Input
8 CS (CTS) Clear to send Output
9 +5 V +5 V power supply Output

#4-40 screw

each signal)

—

CONNECTING THE COMMUNICATION INTERFACE

■ N-42

Connect the N-42 to external equipment through
the RS-422A communication interface as
described below.

RS-422A

SG SD+ SD– RD+ RD–

Code Description Signal

SG Ground –
SD+ Sends data to + terminal. Output
SD- Sends data to - terminal. Output
RD+ Receives data from + terminal. Input
RD- Receives data from - terminal. Input

* Turn ON the terminator of both the N-42 and

the external equipment (termination resistor:
100 Ω). (See p. 9.)

* The cable extension distance must be within

1.2 km.

direction

• Connecting N-42 to general RS-422

equipment

To connect the N-42 to another N-42 unit,
perform the same connections.

N-42

SG
SD+
SD–
RD+
RD–

Twisted pair cable

External equipment

(N-42)

SG
RD+
RD–
SD+
SD–

11

CONNECTING THE COMMUNICATION INTERFACE

• Connecting N-42 to KV-L2

Twisted pair cable

N-42 KV-L2

SG
SD+
SD–
RD+
RD–

KV-L2 is not available in Europe.

12

SG
RDB
RDA
SDB
SDA

• Connecting N-42 to MELSEC-A series

computer link unit (manufactured by
MITSUBISHI)

Twisted pair cable

N-42

SG
SD+
SD–
RD+
RD–

Link unit

SG
RDA
RDB
SDA
SDB

FG

CONNECTING THE COMMUNICATION INTERFACE

■ N-48

To connect the BL series in RS-485 multi-drop
link mode through the N-48, the N-400 multi-drop
unit must be used as the master unit.
For the multi-drop link connecting and operating
procedures, see the N-400 User’s Manual.
The pin assignments for the N-48 and RS-485
equipment are as follows.

Code Description Signal direction

SG Ground –
RS-485+ Sends/receives data to/ Input/Output

RS-485– Sends/receives data to/ Input/Output

from + terminal.

from - terminal.

24V DC OUT

SG SG++––

++––

24V DC IN

RS-485ARS-485

* Up to thirty-one N-48 (BL series) units can be

connected in multi-drop link mode.

* The RS-485 cable’s total extension distance

must be within 1.2 km.

* Turn ON the terminator of the equipment at

both ends of the RS-485 connection (termina­tion resister: 100 Ω) .

13

USING N-42 AS RS-232C/RS-422A CONVERTER

The N-42 can be used as a general RS-232C/
RS-422A converter.
For the RS-422A connection, see p. 11 to p.12.
To connect the RS-232C equipment to the
READER port, follow the connection diagram
shown below.
(For pin assignment, see p. 10.)

• Connecting N-42 to PC (with 25-pin

connector)

Connector case

RD

SD

SG

RS
CS

D-sub 9-pin (female)
#4-40 screw

N-42

2
3
5

7
8

PC

FG

1
2

SD

3

RD

7

SG
RS

4
5

CS
DR

6

ER

20

D-sub 25-pin (male)
M2.6 screw

14

• Connecting N-42 to PC (with 9-pin connec-

tor)

Connector

N-42

case

2

RD

3

SD

5

SG
RS

7

CS

8

D-sub 9-pin (female)
#4-40 screw

Connector
case

2PCRD
3

SD

5

SG
RS

7
8

CS
ER

4

DR

6

D-sub 9-pin (female)
#4-40 screw

USING N-42 AS RS-232C/RS-422A CONVERTER

CAUTION

• Connecting N-42 to BL-3300 series

Connector

N-42

case

RD
SD
SG
RS
CS

D-sub 9-pin (female)
#4-40 screw

2
3
5

7
8

BL-3300

D-sub 9-pin (female)
#4-40 screw

To connect to the BL-3300 series, use our
optional cable OP-27937 (2 m).

Connector
case

2

SD

3

RD

5

SG
RS

7

CS

8

The READER port pin No. 9 is used for a +5 V
power supply output. Be sure not to use pin No.
9 to connect external equipment. This may
damage the unit.

15

INSTALLATION

■ Operating environment

Since the N-42/N-48 is a precision instrument,
choose its operating environment carefully. Avoid
mounting the unit in a location where:

• The ambient temperature may go below 0°C
or above 50°C;

• The relative humidity may go below 35% or
above 85%, or condensation may occur due
to rapid temperature changes;

• A corrosive or inflammable gas is present, or
a high level of dust, salt, iron contents or soot
is present;

• The unit is subject to vibration or impact;

• Water, oil or chemical may splash the unit;

• A strong magnetic field or electric field is

generated.

16

■ Mounting N-42/N-48

To mount the N-42/N-48, use the mounting holes
provided on the unit. The same mounting method
is used for both the N-42 and N-48.

2-ø4.5 mm
mounting hole

READER

POWER SD RD

43.2 mm

N-42

63.2 mm

SPECIFICATIONS

Model N-42 N-48
Conversion interface RS-232C ↔ RS-422A RS-232C ↔ RS-485

Connectable bar code reader BL-500 series/BL-180 series
Power supply for bar code reader 5 VDC ±5% (600 mA)

Trigger
input

OK/NG
output

Interface RS-422A

Ambient temperature 0 to 50°C
Relative humidity 35 to 85%
Atmosphere No dust, no corrosive gas
Vibration resistance 10 to 55 Hz, 1.5 mm double amplitude in X, Y and

Power supply voltage 24 VDC +10%/-20%
Current consumption 260 mA max.
Weight Approx. 100 g

Input rating 15 to 26 VDC, 10 mA max.
Max. OFF current 1.0 mA
Output type NPN open-collector
Rated load 30 VDC, 100 mA
Leak current (at OFF) 0.1 mA max.
Residual voltage (at ON) 1 V max.

(level conversion) (level conversion)

(Maximum extension

distance: 1.2 km)

Z directions, two hours respectively

RS-485 (Maximum number of
connectable units: 31, Maximum
total extension distance: 1.2 km)

17

DIMENSIONS

Unit: mm

(70)

18

43.2

5.9

5.9

63.2
75

2 x ø4.5
mounting hole

5.5

55

26

19

Specifications are subject to change without notice.

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PHONE: [phone] FAX: [phone]

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KEYENCE CORPORATION

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Osaka, 533-8555, Japan
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POP-BLU2-I1-1-2321