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EC3000 Installation and Operator’s Manual 71U-1409-300K; REV 20 Page 8 of 24

4.0 Host RS-232 Serial Interface Specifications

4.1 Hardware Interface

The Unit provides an RS-232 Asynchronous Serial Communications port to interface to the Host system. This connection

is provided using a single DB-9 female pin connector marked HOST or alternately an RJ-45 connector. The Unit is

configured as a DCE unit and connects to an associated DTE host using a straight 1:1 cable to the DB-9 connector

(assuming the host system uses a corresponding DTE DB-9 connector). The pin-out below provides the basic cabling

requirements to connect the Unit to a PC type host system serial port.

Notes: (1) DB-9 pins 1 and 9 are not required connections.

(2) RJ-45 serial connection only applicable if it is installed in place of the Ethernet RJ-45 connector.

(3) Pin 1 on the RJ-45 serial connector option will either be a no-connect or a ground connection.

Host (DTE) PC/AT or equivalent Signal Flow

EC3000 (DCE)

Pin #, DB-9 Signal Name Pin #, DB-9F Pin #, RJ-45

(2)(3)

Signal Name

1 CD N/A 1

(1)

8 Signal GND

2 RxD



2 3 TxD

3 TxD



3 2 RxD

4 DTR



4 7 DSR

5 Signal GND N/A 5 8 Signal GND

6 DSR



6 6 DTR

7 RTS



7 4 CTS

8 CTS



8 5 RTS

9 RING



(1)

– Not Connected

4.2 Data Structure

The Unit uses an asynchronous serial data transmission method. Data is sent based on any combination of the following:

Baud Rate Data Length Parity Stop Bit

115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200 8, 7 None, Even, Odd 2, 1

5.0 ASCII Control Character List

ACK

- Acknowledge character (06

HEX

). Notifies host or Unit that the previous message was received correctly.

BEL

- BEL character (07

HEX

). May be used to initiate a beep from the Unit (depends on FW option).

- Carriage Return character (0D

HEX

). Used in conjunction with LF to separate magnetic TRACK and BLOCK fields.

DC1

- XON character (11

HEX

). Used to indicate that the host serial port is ready.

Also used to identify Track 1/Block 1 magnetic data in IMAGE mode.

DC2

- (12

HEX

). May be used to initiate a dual tone beep from the (depends on FW option).

Also used to identify Track 1/Block 2 magnetic data in IMAGE mode.

DC3

- XOFF character (13

HEX

). Used to indicate that the host serial port is NOT ready.

Also used to identify Track 1/Block 3 magnetic data in IMAGE mode.

! “ #

- ID characters (21 – 22 – 23

HEX

). Used to identify Track 2/Blocks 1, 2 & 3 magnetic data in IMAGE mode.

1 2 3

- ID characters (31 – 32 – 33

HEX

). Used to identify Track 3/Blocks 1, 2 & 3 magnetic data in IMAGE mode.

A B C

- ID characters (41 – 42 – 43

HEX

). Used to identify Track 4/Blocks 1, 2 & 3 magnetic data in IMAGE mode.

ETX

- End Of Text character (03

HEX

). Used to suffix the PECTAB format table and commands being sent to the Unit. Used

by the Unit to suffix magnetic data in image mode and command responses. [ETX] may be a series of characters.

- Line Feed character (0A

HEX

). Used in conjunction with CR to separate magnetic TRACK and BLOCK fields.

NAK

- Negative Acknowledge character (15

HEX

). Notifies host or Unit that the previous message was NOT received

correctly.

NUL

- NULL pad character (00

HEX

). Character is typically ignored by the Unit unless it is being passed through to one of the

device ports, part of an [STX] or [ETX] sequence or used in a communications protocol such as an LRC or DRC.

SOH

- Start Of Header character (01

HEX

). Sometimes used to prefix special commands or messages.

STX

- Start Of Text character (02

HEX

). Used to prefix the PECTAB format table and commands being sent to the Unit.

Used by the Unit to prefix magnetic data in image mode and command responses. [STX] may be a series of

characters.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 23 24

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