Appendix B — NS/DS Catalog Abbreviations

AB

Abell

CZ

Czernik

MA

Markarian

SP

Stephenson

AN

Antalova

DD

Dolidze-Dzimselejsvili

ME

Melotte

ST

Stock

B

Barnard

DO

Dolidze

MF

Maffei

TO

Tombaugh

BA

Basel

FR

Frolov

MK

Minkowski

TR

Trumpler

BD

Baade

GU

Gum

MR

Merrill

TZ

Terzian

BI

Biur

H

Harvard

NE

New

U

Upsala

BK

Berkley

HA

Haffner

PA

Palomar

VB

Van Den Burgh

BL

Blanco

HB

Hubble

PI

Pismis

 

 

BO

Bochum

HU

Humason

RO

Roslund

 

 

CE

Cederblad

KI

King

RU

Ruprecht

 

 

CR

Colinder

LY

Lynza

SH2

Sharpless

 

 

Appendix C — RS-232 Cable Assembly

The NGC-MAXcomputer unit has an RS-232 serial port which may be used to provide encoder position information to a personal computer (PC). This can be used with the sample BASIC program provided in Appendix D, or with a commercial software program which supports the NGC-MAXprotocol (such as Software Bisque's THESKY™).

A special cable is required between the NGC-MAXand your PC. You may use the information here to assemble your own cable, or you may purchase one from JMI. While a 12 foot (3.6m) cable is standard, a custom length may be special ordered.

The connector at the NGC-MAXside of the cable is an RJ11 or RJ12 phone-type plug using the center four contacts. Reference the following diagram when inserting the wires from a flat 4-conductor cable:

YEL GRN RED BLK

Wire insertion end of RJ11 or RJ12 male connector

The connector at the PC can be one of three varieties, depending upon your PC. Check the size of the PC's serial, or COM port connector which you plan to use with the NGC-MAX. On IBM-compatible systems, it should be a 9 or 25 pin male connector with two rows of pins. On Macintosh systems, it will be a round 8 pin female connector.

Once you have determined the proper connector, use the appropriate pinout below to complete the cable.

9-socket D-subminiature (female)

 

25-socket D-subminiature (female)

2

 

YEL

 

 

 

TX

 

 

2

 

 

GRN

 

 

RX

3

 

GRN

 

 

 

RX

 

 

3

 

 

YEL

 

 

TX

5

 

RED

 

 

 

GND

 

 

7

 

 

RED

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

 

4

5

 

1

2

3

4

5

6

7

8

9

10 11 12 13

 

 

6

7

8

 

9

 

14 15 16 17 18 29 20 21 22 23 24 25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Solder side of connectors

Page 14

8-pin mini-DIN (male)

3

GRN

RX

4

RED

GRN

5

YEL

 

TX

8

RED

GND

 

1

2

 

3

4

 

5

6 7 8