Hardware
3-13
Digital I/O Lines
ChartScan has eight digital input lines and thirty-two digital output lines available on a rear panel DB-50 connector.
These lines can be output and/or input using ChartScan commands.
Note:
The first
16 output lines are available for use with relays via the high current CSN/Relay card option. If
used, the relay card must be installed in slot 1 (bottom slot) of the ChartScan main unit. The CSN/Relay
card is discussed at the end of this chapter.
Logic Levels
Each digital output line will drive five (5) standard TTL loads. All digital input lines are one-eighth (0.125) TTL
loads. All inputs are protected against damage from high static voltage. Normal precautions should be taken to limit
the input voltages to the range of 0.0 to 5.3 volts. All digital I/O lines are referenced to digital ground pins (see
following table,
DB50 Pinout
).
CAUTION
CAUTION
CAUTION
CAUTION
Do not exceed the 0.0 to 5.3 volt levels described above. Exceeding these levels may
damaged the unit in a way not covered by the warranty.
Digital I/O Port Pinout
The following figure and table identify pin locations for outputs, inputs, and grounds associated with the DB50
connector. Outputs 1 through 32 are typically used for alarms 1 through 32, respectively. As mentioned above,
outputs 1 through 16 can be used with a relay card option.
DB50 Pin Descriptions
Output
Signal
Pin
No.
Output
Signal
Pin
No.
Input
Signal
Pin No.
1
1
17
39
1
15
2
34
18
23
2
48
3
18
19
7
3
32
4
2
20
40
4
16
5
35
21
24
5
49
6
19
22
8
6
33
7
3
23
41
7
17
8
36
24
25
8
50
9
20
25
9
10
4
26
42
11
37
27
26
Ground Pins
12
21
28
10
12, 13, 14,
13
5
29
43
28, 29, 30, 31,
14
38
30
27
45, 46, 47
15
22
31
11
16
6
32
44
Summary of Contents for OMB-CHARTSCAN 1400
Page 1: ...August 2002 OMB CHARTSCAN 1400 Portable Data Recorder p n OMB 483 0901 Rev 3 1...
Page 6: ...iv ChartScan User s Manual...
Page 24: ...ChartScan User s Manual...
Page 32: ...2 8 General Information ChartScan User s Manual Notes...
Page 56: ...3 24 ChartScan User s Manual Notes...
Page 124: ...6 20 Calibration ChartScan User s Manual...
Page 126: ...A ii ChartScan User s Manual...
Page 136: ...API Commands Appendix A A 10 ChartScan User s Manual Notes...
Page 176: ...API Commands Appendix A A 50 ChartScan User s Manual...
Page 230: ...Appendix C Registers Data Formats Queries ChartScan User s Manual C 13...
Page 237: ...Registers Data Formats Queries Appendix C C 20 ChartScan User s Manual Notes...
Page 257: ...E 2 ChartScan User s Manual Notes...
Page 265: ...ASCII Code Summary Appendix F F 8 ChartScan User s Manual Notes...
Page 269: ...Abbreviations Appendix H H 2 ChartScan User s Manual Notes...
Page 271: ...ChartScan User s Manual...