Operating Instructions
Model 100E Instruction Manual
6.8. Digital Inputs and Outputs
6.8.1. Status Outputs
The status output signals report analyzer conditions through optically isolated transistors
which can sink up to 50 mA of DC current to ground. These outputs can be used with
interface devices that accept logic-level digital inputs, such as programmable logic
controllers (PLC).
NOTE
Most PLCs have internal provisions for limiting the current that the input will
draw from an external device. When connecting the M100E status outputs to a
unit that does not have this feature, external pull-up resistors must be used to
limit the current through the individual transistor outputs to 50 mA or less
(120 Ω for 5V supply). Refer to motherboard schematic 04069 in Appendix D.
The status outputs are accessed through a 12 pin connector on the analyzer's rear panel
labeled STATUS (see Figure 6-4).
STATUS
+
1
2
3
4
5
6
7
8
D
Figure 6-4:
Status Output Connector
90
045150102 Rev XB1