Process Sensors Sensor Therm METIS M311 Operating Manual page 12

- Exceeding the maximum allowed internal device temperature
- When equipped with PID controller: controller activity, control within definable setpoint limits, con-
trol completed successfully, hold time finished.
 Digital input: A voltage pulse of 24 V (exception: contin-
uous voltage at "Activate controller"), pulse length adjust-
able via software (minimum 3 ms, factory settings 100
ms) under 7.3.2
debounce time
- Clearing the peak picker (see 6.2.2)
- Start controller (devices with PID controller, see
7.3.3).
- Activate controller: The control process is activated
as long as voltage at the terminal is present.
- Load pyrometer configuration (devices with PID con-
troller also control parameters) (see under
tor" or 7.3.5
- Switch on / off laser targeting light (when equipped with laser targeting light)
(the targeting light will automatically switched off after 3 minutes if it is not switched off manually. Adjusta-
ble via software under
CAUTION
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|SAFETY INSTRUCTIONS|
 Never look into the direct or reflected laser beam.
 Do not point the laser to anyone.
 If laser radiation hits the eye, avert one's eyes immediately.
 Analog input (only M3 and only on input/output 3): About a 0–20 mA
current source, some parameters can be adjusted externally between
their smallest and largest setting value (settings via SensorTools soft-
ware  Configurable Inputs / Outputs
- Emissivity slope (0 mA = 0.8; 20 mA = 1.2)
- Emissivity for every channel (0 mA = 0.05; 20 mA = 1.2)
- Setpoint at devices with PID controller (0 mA = zero scale tempera-
ture, 20 mA = full scale temp.)
- Measuring distance at M3 devices with motorized focus (0 mA = shortest distance, 20 mA = widest dis-
tance)
4.1.5 Serial Interface RS232 / RS485 (M3: switchable RS232 / RS485; H3: only RS485)
The serial interface is used for digital communication of the pyrometer with another computer, for example a
PC for data transmission to the software SensorTools. Via interface always all temperatures are transferred (2-
color and one channel temperatures) as well as device information and parameters. The maximum transmis-
sion speed (in Baud) is limited by the cable length, it is halved with each doubling of the transmission path.
 RS232: about 7 m cable length with 19.2 kBd. Adjustable are values from 4.8 to 115.2 kBd.
 RS485: about 2 km with 19.2 kBd. Adjustable are values from 4.8 to 921.6 kBd.
Connecting one pyrometer via RS232 or RS485:
In a short RS232 or RS485 connection to the master
(computer receiving the data), the pyrometer is connect-
ed directly as a point-to-point connection with the master.
It is advantageous to connect all interface cables in order
to avoid reflections.
12
 Configurable Inputs / Outputs
enables:
Setups).
7.3.2 Device Settings  Laser targeting light settings).
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Laser radiation, laser class 2, do not look into the beam.
METIS M311 / M322 / H311 / H322 (12-pin)
+24 V

Push
button
0 V
Note: The input is safely detected as "high" at a voltage
> 15.5 V and safely detected as "low" at a voltage < 3.0 V.
7.3.2  Configurable Inputs / Outputs
 Analog input):
Pin 2
Pin 3
Pin 5
RS232 (PC)
RS485
(Master /
PC)
+24 V
White
Grey
Input 1-3
Pink
Blue
0 V
Brown
 "parameter selec-
Setpoint input
via external
0...20 mA
Blue
Current source
Brown
TxD Violet
RxD
TxD Red-blue
TxD
RxD Black
GND
RxD Grey-pink
DGND Red
A (-) Violet
A (-)
A (-) Red-blue
B (+)
B (+) Black
GND
B (+) Grey-pink
DGND Red
M3 / H3
>10 kOhm
M3
≤300 Ω
0 V
Pyrometer
Pyrometer