Care And Cleaning; Appendix A I/O Option Installation - Cardinal 748 Technical/Operation Manual

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 5
PIN 9
figure no. 14 - analog output connector pin layout
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
1 ............. ground
20 ............ ground
2 ............... 800K
21 .............. 400K
3 ............... 200K
22 .............. 100K
4 ................ 80K
23 ............... 40K
5 ................ 20K
24 ............... 10K
6 ................. 8K
25 ................ 4K
7 ................. 2K
26 ................ 1K

CARE AND CLEANING

PIN NUMBER
PIN 1
PIN 6
PIN 19
BCD output connector pin layout
PIN 37
PIN NO. FUNCTION
8 ................ 800
27 ............... 400
9 ................ 200
28 ............... 100
10 ................ 80
29 ................ 40
11 ................ 20
30 ................ 10
12 ................. 8
31 ................. 4
13 ................. 2
32 ................. 1
14 ............ motion
33 ............. lb*/kg
40
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. 15 -
PIN NO. FUNCTION
15 ....................... gross*/net
34 ......................... aux. out
16 .......................... aux. in
35 ........................ +polarity*
17 ........................ data valid
36 ........................over cap.*
18 ............................ print
37 ....................... input spec.
19 ..... VCC out (200 OHM current limit)
NOTE! * indicates a high
level when function is true.
PIN 1
PIN 20