In electronics, a multiplexer (or mux) is a device that selects one of several analog input signals and forwards the selected input into a single analog output. This makes it possible for several signals to share devices, for example one A/D converters of a PLC instead of having one device per input signal.
So the temperature multiplexer TAMP4-VF shares up to 4 PT100 sensors to one analog output of 4 ... 20 mA.. These are operating as 2-wire sensors with 1.5 mA constant current.
In time slots of 1 second one channel is switched to the next. The measured temperature is put as an analog signal to the output of AA (4-20mA).
By means of two binary coded digital outputs TAMP4 indicates the number of the selected channel to a supervising control according to the formula:
Current input channel = 2 * bit1 + 1 * bit0 + 1
The connections are made via push-in terminals up to max. 1.5 mm².
TAMP4-VF is contactless and maintenance free
Power supply U V = 24 V DC / 0,1 A
Housing B x H x T 70 x 86 mm x 60 mm
DIN Rail mounting
Protection IP 20
Ambient temperature -40°C ... +75°C
Temperatur sensor PT100 in 2-Leitertechnik
Temperature range -50°C C ... +150°C
Tolerance < ± 2°C
Measuring current ca. 1,5 mA
Output 4 ... 20 mA (≤ 500 Ω) max. 10 V
Error detection output < 4 mA