Rosemount 3144P - Page 147

Reference Manual
00809-0100-4021, Rev FB
August 2011
B-13
Rosemount 3144P
3. Safety Parameters:
Table B-1. Fieldbus Protocol
Safety Parameters
4. This temperature transmitters with F
OUNDATION fieldbus protocol is
suitable for FISCO (IEC 60079-25:2005) with the following safe
parameters:
Table B-2. FISCO Parameters
5. The cable entry of the temperature transmitter must be protected to
ensure the degree of protection of the enclosure to IP 20(GB4208-1993)
at least.
6. The terminals for connection to power supply of the temperature
transmitter must be connected to an associated apparatus certified by
NEPSI in accordance with GB 3836.1-2000 and GB 3836.4-2000 to
establish an intrinsic safety system. The following requirements must be
fulfilled:
Where:
C
c
, L
c
the distributed capacitance and inductance of the cables
U
o
, I
o
, Po maximum output parameters of the associated apparatus
C
o
, L
o
maximum external parameters of the associated apparatus
7. The terminals for connection to sensor of temperature transmitters must
be connected to an intrinsically safe sensor certified by NEPSI in
accordance with GB 3836.1-2000 and GB 3836.4-2000 to establish an
intrinsically safe system. The following requirements must be fulfilled:
Where:
C
c
, L
c
the distributed capacitance and inductance of the cables
U
i
, I
i
, P
i
maximum input parameters of intrinsically safe sensor
C
i
, L
i
maximum internal parameters of intrinsically safe sensor
Input Parameters RTD Terminals
U
i
= 30 V U
o
= 13.9 V
l
i
= 300 mA l
o
= 23 mA
P
i
= 1.0 W P
o
= 79 mW
C
i
= 0.022 F C
o
= 77 F
L
i
= 0 mH L
o
= 0 mH


Parameters
U
i
= 17.5 V
l
i
= 300 mA
P
i
= 1 W
C
i
= 0.022 F
L
i
= 0 mH
U
o
≤ U
i
C
o
≥ C
i
+ C
c
I
o
≤ I
i
L
o
≥ L
c
+ L
i
P
o
≤ P
i
U
i
≥ U
o
C
i
≤ C
o
- C
c
I
i
≥ I
o
L
i
≥ L
c
- L
o
P
o
≥ P
i

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