User manual for RTD,TC,mV/4-20mA converter module SPT-86L
- The unit must be properly set-up, according to the application. Incorrect
configuration can cause defective operation, which can lead to unit damage or
an accident.
-
If in the case of a defect of unit operation there is a risk of a serious threat
to the safety of people or property additional, independent systems and
solutions to prevent such a threat must be used.
- Neighbouring and mating equipment must meet the requirements of appropriate
standards and regulations concerning safety and be equipped with adequate
anti-overvoltage and anti-interference filters.
-
Do not attempt to disassemble, repair or modify the unit yourself. The unit
has no user serviceable parts. Units, in which a defect was stated must be
disconnected and submitted for repairs at an authorized service centre.
The unit is designed for operation in an industrial environment and must
not be used in a household environment or similar.
2.
GENERAL CHARACTERISTICS
The
SPT-86L
module is an isolated temperature and voltage to current (in 4-20 mA
standard) converter. The device is equipped with one voltage input (0-150 mV), one RTD input
(Pt 100/500/1000) and one TC (thermocouple) input (K, S, J, T, N, R, B, E). The device
automatically compensates the cold junction temperature. Both RTD and TC inputs have full
linearisation of characteristics. Only one type of input can be used at a time. Ranges of
individual inputs are given in the next chapter. The module is able to detect a break of any of
the measurement wire. The measurement after being processed according to the scale given
by the user is used to drive the passive current output.
The configuration of the device can be done on request or by the user. The
communication with the device is through RS-485 interface with Modbus RTU protocol.
The supply input together with RS-485 interface, measurement input and current output
are all galvanically isolated from each other.
3.
TECHNICAL DATA
Power supply voltage
16...
24
...36V DC
(separated)
External fuse (required)
T - type, max. 1 A
Current consumption
typically 0.65 W
Voltage input (150mV range)
0÷60 mV, 0÷75 mV, 0÷100 mV, 0÷150 mV
Voltage measurement accuracy
± 0.1% @ 25°C; ± one digit (for 0÷150 mV range)
Voltage input resistance
> 1,5 M
Ω
Accepted prolonged input ov20%
3
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