Input for PT100 750-461, 481
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Technical Data:
Item Number 750-
461, 481, 461/000-002, 461/000-003
Number of inputs
2
Input current (internal)
65 mA
Voltage supply
via system voltage
Sensor types
PT100, PT 200, PT 500, PT1000, Ni100, Ni120, Ni1000
Wire connection
2-conductor, 3-conductor (presetting)
Temperature range
PT: -200°C..+850°C Ni:-60°C...250°C
Resolution
0.1°C over the whole area
Isolation DC/DC
400V system / power supply
Measuring current
0.5mA type
Bit width per channel
16 bits: data; 8 bits: control/status
Configuration
none, optional via software parameter
Operating temperature
0°C....+55°C
Wire connection
CAGE CLAMP; 0.08 to 2.5mm
2
Dimensions (mm)WxHxL
12 x 64* x 100 (*from upper edge of the carrier rail)
Presetting
3-conductor PT100
The function module 750-461 allows the direct connection of PT- or Ni-resistance
sensors. The module is suitable for 2- or 3-wire RTDs. Connection is made according to
the above wiring diagram.
Linearization is accomplished over the entire measurement range by a microprocessor.
The temperature ranges of the above listed RTD types is available to the user. The
temperature ranges of the sensors are represented with a resolution of 1 bit per 0.1° C in
one word (16 bits). Resulting from this, 0°C corresponds to the hexadecimal value 0000
and 100°C is 03E8 (dez.1000). Temperatures below 0° are represented in two’s
complement with a leading ‘1’.
The function module works in the defined temperature range for the PT100 sensors of
-200°C to +850°C. The voltage resolution is represented with 16 bits. An A/D
converter and processor converts the voltage value to a numerical value proportional to
the temperature of the selected resistance temperature sensor.
A short circuit or an interruption of the RTD wire is transmitted to the bus module and
indicated by the red error LED. The green LED identifies that the module is
communicating properly with the connected Buscoupler.
