Wika S-20 Manual do Utilizador descarregar pdf (Página 8)

WIKA Safety manual pressure transmitter, model S-20

14082128.02 06/2014 GB/D/F/E

Parameter Output signal

4 ... 20 mA

(2-wire)

20 … 4 mA

(2-wire)

DC 1 … 5 V DC 1 … 6 V DC 0.5 …

4.5 V

DC 0.5 … 4.5

V ratiometric

Minimum operating voltage U

[V DC]

8 8 8 9 8 4.5

Maximum operating voltage UB

[V DC]

(35 with cULus)

5.5

Operating voltage U

absolute

maximum [V DC]

40 40 40 40 40 5.5

Maximum ripple in the operating

voltage [% of V DC ] Frequency

range with 50 Hz, 60 Hz, 100 Hz,

120 Hz

±0.5 ±0.5 ±0.5 ±0.5 ±0.5 N/A

Maximum current supply [mA] 25 25 12 12 12 12

Dissipation loss

[mW]

828 828 432 432 432 432

Operating voltage inuence

[% every 10 V]

±0.05 ±0.05 ±0.05 ±0.05 ±0.05 N/A

Load maximum [Ω] ≥ (U

- 7.5 V) /

0.023 A

≥ (U

- 7.5 V) /

0.023 A

≤ 5,000 ≤ 6,000 ≤ 4,500 ≤ 4,500

Maximum load capacitance [nF] N/A N/A 100 100 100 0.47

Reverse polarity protection

between U

B+

B-

yes yes yes yes yes no

Short-circuit resistance between

B+

N/A N/A no no no no

Short-circuit resistance between

B-

N/A N/A yes yes yes yes

Settling time [ms] 3 3 3 3 3 3

Switch-on time [ms] 150 150 150 150 150 150

Table 2-1: Parameters

2. Safety

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 51 52

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