Oven TPM138, Паспорт и руководство по эксплуатации

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TRM138
the rate of: U
rev.max
> (2…3) U
sv
; I
fc max
> (1.5…2) I
rpc
,
where U
rev.max
– diode maximum admissible reverse
voltage; U
sv
– relay assembly supply voltage; I
fc max
–
diode maximum admissible forward current; I
rpc
– relay
assembly pickup current.
Example of transistor optocouple application is
presented in Figure 11.
3.2.6.5. In TRM138C instruments lowpower
triac optocouples are used as OUs. These
optocouples’ outlets have galvanic insulation from
the instrument’s circuit and are led out to the exterior
junction terminals. These optocouples, as a rule, are
used to control highpower thyristors or triacs commuting power circuits of actuating devices.
Control pulses are generated by triac optocouples at the moment when the circuit voltage passes
through the zero point which substantially reduces the interference level.
Examples of triac optocouple applications are presented in Figure 12 and 13.
Note. RC filters (see Figure 12, 13) are designed to protect circuit components from high voltage jumps.
3.2.6.6. TRM138I instruments are equipped with analog type output equipment designed
to convert input data in direct current signals (“parametercurrent” conversion) by means of 10
digit DACs built in the OU. Converted signals can be used for parameters’ recording (see Item
3.2.5.4).
Figure 12. Triac optocouples applications for load control by means of a power triac
Figure 13. Triac optocouples applications for load control by means
of a power thyristors
Instrument Design and Operation Section 3
Figure 11. Application of transistor
optocouple for control over
electromagnetic relay assembly