Getting Started Model 360E Instruction Manual
3.1.2.3. Connecting the Status Outputs
If you wish utilize the analyzer’s status outputs to interface with a device that accepts logic-level digital inputs,
such as programmable logic controllers (PLC’s) they are accessed via a 12-pin connector on the analyzer’s rear
panel labeled STATUS.
STATUS
1 2 3 4 5 6 7 8 D +
NOTE
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
supply).
The pin assignments for the status outputs can be found in the table below:
Table 3-2: M360E Status Output Pin Outs
OUTPUT # STATUS
DEFINITION CONDITION
1 SYSTEM OK On if no faults are present.
2 CONC VALID On if CO2 concentration measurement is valid.
If the CO2 concentration measurement is invalid, this bit is OFF.
3 HIGH RANGE On if unit is in high range of DUAL or AUTO range modes.
4 ZERO CAL On whenever the instruments ZERO point is being calibrated.
5 SPAN CAL On whenever the instruments SPAN point is being calibrated.
6 DIAG MODE On whenever the instrument is in DIAGNOSTIC mode.
7 ALARM1 On whenever the measured CO2 concentration is above the set point for
ALM1
8 ALARM2 On whenever the measured CO2 concentration is above the set point for
ALM2
D EMITTER BUSS The emitters of the transistors on pins 1-8 are bussed together.
+ DC POWER + 5 VDC
Digital Ground The ground level from the analyzer’s internal DC power supplies.
14 05232 Rev B3