Analog Output 0 - 5 V Dc Voltage Output - MR MESSKO BeTech Operating Instructions Manual

4.4 Analog output 0 - 5 V DC Voltage output

(see also chapter 8.4 for installation examples)
This analogue output is an optional feature to the
MESSKO BeTech Oil and Winding Temperature
®
Indicators. The output is linear and proportional to the
indicated temperature on the instrument dial, where 0
V DC is provided at the lowest value on the dial and 5
V DC at the highest value, for instance 0 V DC at 0 °C
and 5 V DC at 150 °C (see graph/Fig. 5).
The output can be used for several purposes such as
connection to a computer, to a SCADA system or per-
haps for remote monitoring. Commonly the V DC output
is used for a SCADA or computer connection.
Since the outputs are provided from the indication,
the same temperature is displayed both locally and
remotely - no differences because of settings etc as if
separate transmitters are used.
8
The electrical wiring is easily connected to the terminal
board inside the OTI or WTI (see appendix, chapter
8.4).
CAUTION
The terminals 61, 63 and 64 must be short-circuited
during insulation test. The test voltage must be rai-
sed gradually. Remove the clamps on the terminal
board once the tests are finished.
A separate shielded cable is recommended for the
wiring this analogue output. This includes the Supply
Voltage and the V DC output signal (= terminals 61, 63
and 64). No other signals should be wired through the
same cable and make sure the shield is connected to
ground on one side only.
BA 3527161/02 EN