Cardinal 748 - Care and Cleaning; Appendix A I;O Option Installation

40
CARE AND CLEANING
1. DO NOT submerge indicator in water, pour or spray water directly on instrument.
2. DO NOT use acetone, thinner, or other volatile solvents for cleaning.
3. DO NOT expose equipment to temperature extremes.
4. DO NOT place equipment in front of heating/cooling vents.
5. DO clean the indicator with a damp, soft cloth and mild non-abrasive detergent.
6. DO remove power before cleaning with a damp cloth.
6. DO provide clean AC power and adequate protection against lightning damage.
6. DO keep the surroundings clear to provide clean and adequate air circulation.
APPENDIX A I/O OPTION INSTALLATION
This appendix describes the installation of the optional I/O interfaces. This option consists of both a
0 to 10 volt and 4 to 20 MA analog output, a BCD output and eight (8) programmable inputs.
ANALOG OUTPUT
The analog output is an analog representation of the displayed weight. Connections are made via a
9-pin “D” connector located on the back of the instrument. The maximum load resistance for the
current output is 500 ohms while the minimum load resistance for the voltage output is 2K ohms.
Refer to figure no. 14 for the pin layout for the connector.
PIN NUMBER FUNCTION
1 4 to 20 milliampere output
2 not used
3 not used
4 not used
5 0 to 10 VDC output
6 common
7 common
8 common
9 common
figure no. 14 - analog output connector pin layout
PIN 5
PIN 1
PIN 9
PIN 6
BCD OUTPUT
The BCD output provides a parallel
logic-level BCD output of the
displayed weight. Additional status
signals are included. Connections
are via a 37-pin “D” connector. Refer
to figure no. 15 for the pin layout of
this connector.
PIN NO. FUNCTION PIN NO. FUNCTION PIN NO. FUNCTION
1 ............. ground 8 ................800 15 ....................... gross*/net
20 ............ ground 27 ...............400 34 ......................... aux. out
2 ...............800K 9 ................ 200 16 .......................... aux. in
21 ..............400K 28 ............... 100 35 ........................ +polarity*
3 ...............200K 10 ................80 17 ........................ data valid
22 ..............100K 29 ................40 36 ........................over cap.*
4 ................80K 11 ................ 20 18 ............................ print
23 ...............40K 30 ................ 10 37 .......................input spec.
5 ................20K 12 .................8 19 ..... VCC out (200 OHM current limit)
24 ...............10K 31 ................. 4
6 .................8K 13 .................2
25 ................4K 32 .................1
7 .................2K 14 ............ motion
26 ................1K 33 ............. lb*/kg
PIN 19
PIN 37
PIN 1
PIN 20
figure no. 15 -
BCD output connector pin layout
NOTE! * indicates a high
level when function is true.