Teledyne 300E Instruction Manual page 25

Model 300E Carbon Monoxide Analyzer
Instruction Manual
The pin assignments for the Status Outputs can be found in the table below:
Output #
Definition
1
2
CONC VALID
3 HIGH RANGE
4
5
6 DIAG MODE
7
8
D
EMITER BUSS
+
Digital Ground
Most PLC's have internal provisions for limiting the current that the input will draw from an
external device. When connecting to a unit that does not have this feature, an external
dropping resistor must be used to limit the current through the transistor output to less
than 50mA. At 50mA, the transistor will drop approximately 1.2V from its collector to
emitter.
4. If you wish to use the analyzer's to remotely activate the Zero and Span
calibration modes, several digital Control Inputs are provided via a 10-pin
connector labeled CONTROL IN on the analyzer's rear panel.
for energizing the inputs are provided below; the first using the internal +5V
available on the CONTROL IN connector and the second, if an external,
isolated supply is employed.
P/N 04288 REV: A
Status
SYSTEM OK On if no faults are present.
On if CO concentration measurement is valid.
If the CO concentration measurement is invalid, this bit is OFF.
On if unit is in high range of DUAL or AUTO Range Modes.
ZERO CAL On whenever the instruments ZERO point is being calibrated.
SPAN CAL On whenever the instruments SPAN point is being calibrated.
On whenever the instrument is in DIAGNOSTIC mode.
SPARE
SPARE
The emitters of the transistors on pins 1-8 are bussed together.
DC POWER + 5 VDC
The ground level from the analyzer's internal DC Power Supplies.
Condition
NOTE
Getting Started
Two methods
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