WIKA T32.1S, Руководство по эксплуатации, Страница: 35 / 80

EN
11258421.13 10/2017 EN/DE
WIKA operating instructions model T32.xS 35
10.3.2 Intrinsically safe supply and signal circuit
(4 ... 20 mA loop; terminal ⊕ and ⊖)
Parameters T32.xS.0IS-x,
T32.xS.0IC-x
T32.xS.0IS-x T32.xS.0NI
Gas hazardous
application
Dust hazardous
application
Gas hazardous
application
Terminals + / - + / - + / -
Voltage U
i
DC 30 V DC 30 V 40 V
Strength of current I
i
130 mA 130 mA 23 mA 1)
Power P
i
800 mW 750/650/550 mW
2)
1 W
Effective internal
capacitance C
i
7.8 nF 7.8 nF 7.8 nF
Effective internal
inductance L
i
100 µH 100 µH 100 µH
1) The maximum operating current is limited by the T32. The maximum output current of the associated energy-limited apparatus does not have to
be ≤ 23 mA.
2) With reference to ambient temperature; see table “Temperature class”.
The supply and signal circuit and the intrinsically safe sensor circuit must be
considered as galvanically connected to each other.
10.3.3 Connection of the HART
®
modem/HART
®
communicator
(terminal ⊕ and ⊖ )
■
The sum of all voltages connected (supply plus output values of the HART
®
modem
and/or HART
®
Communicator) must not exceed 30 V for T32.xS.0IS and 40 V for
T32.xS.0NI.
■
The sum of the effective capacitances and inductances must not exceed the maximum
permissible value according to the required gas group (IIA up to IIC).
11. Maintenance
The temperature transmitter described in these operating instructions is maintenance-free!
The electronics are completely encapsulated and incorporate no components which could
be repaired or replaced.
Repairs must only be carried out by the manufacturer.
10. Notes for mounting and ... / 11. Maintenance