Omega Engineering OMB-CHARTSCAN 1400 User Manual page 12

ChartScan has eight digital input lines and thirty-two digital output lines available on the rear panel
DB-50 connector.
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 the connector's ground pins.
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 (see note 1).
Note 1:
1-6 ChartScan – Unit Startup and ChartView Tutorial
Do not exceed the 0.0 to 5.3 volts levels described above. Exceeding these levels
may damage the ChartScan unit in a way not covered by the warranty.
Output Pin
Signal No.
1 1
2 34
3 18
4 2
5 35
6 19
7 3
8 36
9 20
10 4
11 37
12 21
13 5
14 38
15 22
16 6
A CSN/Relay is available for high current alarm output applications. If used, this card must
be installed in the bottom slot of ChartScan's main chassis. See page 1-3 for installation
instructions. For more detailed information regarding the card, refer to CSN/Relay Card (for
High-Current Digital Output), in Chapter 3.
CAUTION CAUTION CAUTION CAUTION
DB50 Pin Descriptions
Output Pin No.
Signal
17 39
18 23
19 7
20 40
21 24
22 8
23 41
24 25
25 9
26 42
27 26
28 10
29 43
30 27
31 11
32 44
Input Pin No.
Signal
1 15
2 48
3 32
4 16
5 49
6 33
7 17
8 50
Ground Pins
12, 13, 14,
28, 29, 30, 31,
45, 46, 47
ChartScan User's Manual