User’s Manual
GP-IB／RS-232C Conversion Adapter

ZS–6144AF
Table of contents
1. Outline …………………………………. 1
2. Features ……………..….……………… 1
3. Specifications …….…….……………… 1
4. Operation ……………….……………… 3
5. Connecting cable ………………..……
5
6. Functions …………….………………..
6
7. Appearance ……………………………
8
8. Warranty ……………..………………..
8Zenisu Keisoku,Inc.
Zip code: 183-0027
2-13-37, Honmachi, Fuchu, Tokyo, Japan
TEL: +81-(0)42-368-2126
FAX: +81-(0)42-364-0067

1. Outline
ZS-6144AF is an interface conversion adapter that mediates communication between
GP-IB and RS-232C.
ZS-6144AF operates as an interface converter for incorporating devices with
RS-232C interface into the GP-IB system, and devices with RS-232C interface cancommunicate with the GP-IB controller.

GP-IB
GP-IB
controller
コントローラGP-IB

ZS-6144AF

RS-232C

RS-232C
RS-232C
インターフェイス
interface device
機器

2. Features（1）Small size and lightweight（2）Bidirectional 16 Kbyte buffer memory（3） Processing has been speeded up compared with the conventional ZS-6144F

3. Specifications
3-1 GP-IB（1）Compliant with IEEE Std-488
SHI、AHI、T5、L3、SR1、RL0、PP0、DC0、DT0、CO（2）Connecter
57LE-20240-77C0-D35G-CA
3-2 RS-232C（1）Communication method: Full duplex communication method（2）Synchronization method: Start-stop synchronization method（3）Communication speed: 1200、2400、4800、7200、9600、14400、19200、28800、38400、57600、115200、230400、460800、921600（bps）（4）Parity: No parity, odd parity, even parity（5）Stop bit length: 1, 2（6）Character bit length: 7, 8（7）Delimiter: CR, LF, ETX（8）Logistic level
Voltage

Data signal

Control signal+3V to +12V0（space）

ON-3V to -12V1（mark）

OFF1

（9）RS-232C signal
Connecter
SignalPIN NOFunction

TXD

3Transmission data from ZS-6144AF.

RXD

2

Received data of ZS-6144AF.

CTS

8RTS

7GND

5It is an input signal to receive permission of data transmission.
Transmission data can be controlled by this signal.
It is output signal indicating whether data input/output is possible tothe partner side.
All signal becomes 0V.

（10）Connecter: DE-9P-NR or equivalent

3-3 General specifications（1）Power: DC+5V 500mA 以下（2）Operation temperature: 0 to 40℃（3）Size(mm): 82（W）×30（H）×126（D）（4）Weight: 500g or less（5）Accessory: DC input cable（AC adapter is optional）

24. Operation
4-1 Operation sequence
ZS-6144AF operates as an interface converter that communicates between theGP-IB controller and the RS-232C interface device.
The RS-232C side is in full duplex communication method and the transfer isperformed regardless of the GP-IB side status as a talker or a listener.
16Kbyte
16KバイトSpecified as a talker

トーカ指定時GP-IB

RS-232C
RS-232Cデータ
受信バッファ
data buffer

GP-IB
I/F
リスナ指定時Specifiedas a listener

ZS-6144AF

RS-232C
I/F

RS-232C

GP-IB
GP-IBデータ
受信バッファ
data buffer

16Kバイト
16KbyteIn case of buffer memory is ON.
（1）Talker operation
The data received from the RS-232C is sequentially written the 16 Kbyte buffermemory. When talker is specified, data in the buffer memory is output to theGP-IB side.
When the RS-232C data received buffer memory becomes full, the received data
is discarded without being written to the buffer memory.
（2）Listener operation
When the listener is specified, the data received from the GP-IB is written tothe 8 Kbyte buffer memory. If the RS-232C side is receivable state, data in thebuffer memory is output to the RS-232C side. In this case, it is necessary both
CTS and RTS is ON.
GP-IB handshake is stopped when the data reception buffer memory becomes
full. When the amount of data becomes 2 Kbytes or less, the handshake restarts.
In case of buffer memory is OFF
It is used when transmission / reception data always needs latest data from theother side.
When buffer memory is turned OFF, delimiters separate the continuous data.
If the data received before receiving the delimiter exceeds16 Kbytes, it discards
the data received so far and stores the newly data.
For example, when receiving a delimiter after receiving 18 Kbytes of data, only
the last 2 Kbytes are sent from the sender to the receiver.
If the next new data(B) is sent before sending the received data(A) to thepartner side, the data(A) is discarded and it is rewritten to the data(B)Note) Delimiter setting is done with the MODE switch. For the setting of theMODE switch, refer to page 7.
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4-2 SRQSRQ is generated in the following cases when SRQ function is turned on with DIP
switch (SW3).
1) When the amount of data in buffer memory is exceeded by the data from
RS-232C.
2) When the amount of data in buffer memory is exceeded by the data from GP-IB.
3) When RS-232C communication error occurs (parity error, framing error, overrunerror).

MSB

LSB

1(1)が発生したとき'１'となります。
It becomes “1” when 1) occurs

RQS

It becomes “1” when 2) occurs(2)が発生したとき'１'となります。

(3)が発生したとき'１'となります。
It becomes “1” when 3) occurs

4-3 Flow control of RS-232C
In data transfer with RS-232C, it is possible to perform flow control using X
parameter or control line to prevent loss of received data.
（1）Flow control by control line
This mode is effective when the other device can perform flow control by thecontrol line.
When data reception is possible, the RTS signal is turned ON, and RTS signal isturned OFF when the amount of data in buffer memory is exceeded.
RTS is turned OFF, data is output to the GP-IB side. RTS is turned ON again
when the amount of data buffer memory is less than 4 K bytes.
（2）Flow control by X parameter
This mode is effective when the other device can perform flow control by Xparameter.
① It transmits an X-OFF code(13H) and requests the other device to pausetransmission when the amount of data buffer memory is exceeded by the datafrom the RS-232C interface device.
ZS-6144AF transmits an X-ON(11H) code and requests transmission from theother device when the amount of data in buffer memory becomes 4 Kbytes orless after transmitting the X-OFF code.
② Receiving an X-Off code from the RS-232C stops transmission and restarts
transmission when receiving an X-ON code.
4-4 Error message
When an error occurs, operation is stopped and error contents are notified byblinking the LED on the front panel.
Note) Error will be cleared when power is turned on again.

44-5 RS-232C interface operation
Flow control by control line

RTS signal

Sequence

Transmission

EnabledWhen CTS is ON,
transmission is ready

Always ON
Disabled

Reception

It becomes OFF when buffer
When the buffer becomes full,memoy is ecxeeded
the subsequent data isdiscarded
Always ON

EnabledDisabled

4-6 How to use（1）Set the GP-IB address with bits 1 to 5 of the ADR switch(SW3).
（2）Set the protocol of RS-232C with bits 1 to 7 of the MODE switch(SW2) and thebaud rate switch(S4).
（3）For the connection of the cable, refer to “5. Connection of RS-232C cable”.
（4）Turn on the power to the RS-232C device, ZS-6144AF, GP-IB controller in thisorder.
（5）The configuration of the equipment should be as below.
GP-IB

GP-IB
GP-IB
controller
コントローラ

ZS-6144AF

RS-232C

RS-232C
device
RS-232C機器

5. Connection of RS-232C cable
Please use Dsub-9pin for the cable of ZS-6144AF.
KR-ECLK, KR-LK or equivalent.
When communicating with only TXD, RXD, please wire as follows. However, thebaud rate is up to 57,600 bps.
Connecteddevice
接続機器

ZS-6144AF
未使用
UnusedCD(1)RXD(2)RXD

TXD(3)TXD

DTR(4)
Internal connecting
内部接続

GND(5)

GND

Unused
未使用 DSR(6)RTS(7)CTS(8)
未使用
UnusedRI(9)ショートしてください

short56. Functions
GP-IB address, RS-232C communication protocol, and operation mode are set withthe switch on the board. Take the screws at the 4 corners and remove the top cover
to make the setting. The LED indicates the communication status of GP-IB and
RS-232C.

Note) There is a product with SW1(4 bit dip switch) mounted on the left side of SW2, but please
use this switch in its initial state.

6-1 ADR switch（SW3）Specify the GP-IB address and controls.
※ Is initial setting.
D1 D2 D3 D4 D5 D6 D7 D8※ON(1)※ ※OFF(0) ※ ※ ※ ※ ※1 248 16

X parameter flow
Xパラメータフロー制御

制御線フロー制御
Control line

ON：有り
EnableOFF：無しDisableSRQ function
SRQ機能
注1(0 to 30)
GP-IB address
GP-IB機器アドレス設定（0～30）Note) Do not set “31” as GP-IB address.

66-2 MODE switch（SW2）
Set the communication protocol of RS-232C.
D1 D2 D3 D4 D5 D6 D7 D8ON(1) ※※OFF(0)※ ※ ※ ※
※ ※0: OFF

バッファメモリON/OFF
Buffer memory On/Off
RS-232Cデリミタ設定
Delimiter of RS-232C
Unused未使用
Parityパリティビット
Stop bit length
ストップビット長
キャラクタ長Character bit length

1:ON

0：OFF 1：ON
D6 0: CR 1: LF
D6 0：CR 1：LF
D7 0:
is enable 1: ETX
D7D60：D6が有効
1：ETX

0：1bit1：2bit0: 1bit 1: 2bit
0：7bit1：8bit0: 7bit 1: 8bit

Parity bit
D3

D4Contents00None

10Odd parity

11Even parity

6-3 Baud rate switch（S4）Initial setting 9600bps

スイッチ番号
Switch #ボーレート(bps)
Baud rate (bps)スイッチ番号
Switch #ボーレート(bps)
Baud rate (bps)

01,200

838,400

12,400957,600

24,800A

115,200

37,200B

230,400

49,600C

460,800

514,400

D921,600

619,200

E

未使用
Unused728,800

F

Unused
未使用

6-4 LED（1）LED
Name
POWER

Contents
Usable state

TX

Data sending to RS-232C

RS-232CRX

Data receiving from RS-232C

flashing simultaneously.

TLK

Data sending to GP-IB

GP-IBLSN

Data receiving from GP-IB

flshing simultaneously.

7errorerror

whenwhen7. Appearance
Front side

Back side

8. Warranty
If it fails during normal use, we will repair it free of charge as described in thiswarranty as below.
1) During the warranty period which is one year from the date of purchase, we willrepair it free of charge in case of malfunction in accordance with instruction
manual.
2) It will be charged for extra in the following case, even during warranty period.
 Incorrect usage or failure or damage caused by carelessness.
 Failure or damage caused by improper repair or remodeling.
 Failure or damage caused by external factors such as fire, earthquake, othernatural disasters, abnormal voltage and so on.
 Replacement of consumable parts.
 Change of power supply and voltage.
3) This warranty provision is effective only in Japan.

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