Connecting The Status Outputs; Figure 3-4: Status Output Connector; Table 3-2: Status Output Signals - Teledyne 100E Instruction Manual

Model 100E Instruction Manual

3.1.1.2. Connecting the Status Outputs

To utilize the analyzer's status outputs are accessed through a 12 pin connector on the
analyzer's rear panel labeled STATUS. They are used to interface with a device that
accepts logic-level digital inputs, such as programmable logic controllers (PLC's).
Most PLC's have internal provisions for limiting the current the input will draw. When
connecting to a unit that does not have this feature, external resistors must be used to
limit the current through the individual transistor outputs to ≤50mA (120 Ω for 5V
Rear Panel Status
Label Definition
1 SYSTEM OK
2 CONC VALID
3 HIGH RANGE
4 ZERO CAL
5 SPAN CAL
6 DIAG MODE
7 - 8 SPARE
D EMITTER BUS
SPARE
+ DC POWER
Digital Ground
045150102 Rev XB1
STATUS
1 2 3 4 5 6
Figure 3-4: Status Output Connector
NOTE
supply).

Table 3-2: Status Output Signals

Condition
ON if no faults are present.
OFF any time the HOLD OFF feature is active, such as during calibration
or when other faults exist possibly invalidating the current concentration
measurement (example: sample flow rate is outside of acceptable limits).
ON if concentration measurement is valid.
ON if unit is in high range of the AUTO Range Mode
ON whenever the instrument's ZERO point is being calibrated.
ON whenever the instrument's SPAN point is being calibrated.
ON whenever the instrument is in DIAGNOSTIC mode
The emitters of the transistors on pins 1-8 are bussed together.
+ 5 VDC, 300 mA source (combined rating with Control Output, if used).
The ground level from the analyzer's internal DC power supplies
+
7 8 D
Getting Started
29