M-S Cash Drawer EP-125KC Instructions Manual

M-S Cash Drawer Corporation
KC type interface instructions

Introduction

The KC trigger board and external power supply (AC adapter) enable the cash drawer
to be controlled by a serial output port.

Interfacing

The trigger board requires a pulse >3.5 VDC for at least 100 milliseconds to reliably
open the drawer. The preferred and most common way to supply this signal is via a
standard serial port on your host operating at 300 BAUD or slower. The higher the baud
rate the longer the string of characters needed to produce the required pulse.

Installation – Dedicated Serial Interface

This method uses a DEDICATED RS-232 serial port on your computer or terminal to
send an "open" command to the trigger board in the cash drawer. Any data sent on this
port which is a minimum 100 milliseconds will open the cash drawer. If it is necessary
to independently operate a printer or other device on the same serial port, the KSI
interface type is required. Please refer to the KSI instructions for more information.

Cabling Specifications

Color
White 2 3 3 TxD

Black 7 5 7 SG
Jumper 1* 4-5 7-8 4-5 RTS-CTS
Jumper 2* 6-8-20 1-4-6 6-8-20 DSR-DCD-DTR
* Jumpers simulate serial port handshaking

Computer Serial Port Data Terminal

25 pin 9 pin 25 pin

Definition

Integration

Connect the cash drawer interface cable to the computer's serial port. Plug the AC
adapter cable into the mating connector on the back of the cash drawer. Plug the AC
adapter into the 115 VAC wall socket. Check to make sure the drawer is unlocked and
operates manually with the keylock. Close the drawer. The drawer should now open
whenever data is sent to the serial port.

Testing

Testing the drawer involves configuring the serial port and sending data to the cash
drawer. The following test are for IBM PC's and compatibles. The software used with
the cash drawer should perform similar functions.

From QBasic:

10 OPEN "com1:300,n,8,1,ds" AS #1 ----(configures port)
20 PRINT #1, CHR$(7) ---(sends ASCII(7))

Note: if a higher BAUD rate is used, several characters should be sent. Change line 20
to:

20 PRINT #1, "@@@@@@@@@@@@@@@@@@@@" ---(sends 20"@" symbols)

From DOS:

C:> MODE COM1:300,n,8,1
C:> ECHO > COM1: @@@@@@@@@@@@@@@@@@@@@@

The MODE command configures the serial port. The ECHO command directs data to
the serial port.

Troubleshooting

First, re-check all the steps of the installation.

1. Verify that the AC adapter is plugged into wall power and that the connector is
firmly connected to the receptacle on the back of the cash drawer.

2. Verify that the interface connections to the computer are correct and
electrically sound. Make sure the connector is firmly plugged into the correct
port. If you are communicating to COM1: make sure the connector is plugged

into COM1: and not COM2:.

3. Make sure the drawer is unlocked and operates manually with the key. Close
the drawer.

4. Use a test program, not the vendor software - to open the cash drawer.

Symptoms usually fall into two categories:

1. An error message appears stating "write fault error". This message indicates
that the necessary handshaking between the computer and the cash drawer
did not occur. Consult the documentation for your computer to make sure the
cash drawer is plugged into the correct port (i.e. COM1:) and that the
handshaking is correct. Jumper "Request to Send" (RTS) to "Clear to Send"
(CTS) together. Jumper "Data Set Ready" (DSR) to "Carrier Detect" (DCD) to
"Data Terminal Ready" (DTR) together. The white wire from the cash drawer
must be connected to "Transmit Data" (TxD) and the black wire to "Signal
Ground" (SG).