ABB TTF350 Operating Instructions Manual page 52

2-sensor input functionality / Dual sensor mode
Device Description
parameters
Sensor 1: Sensor
Line resistance
resistance relevant for all
Pt, Ni, Cu
resistance
sensor types in
2-wire sensor
transmitter
connection type
Sensor 1: When using the
Reference transmitter
point reference point:
internally
relevant for all
thermocouples
except type B, if
thermo/
equalizing
conductor is
clamped to the
transmitter
without using the
transmitter
reference point:
without type B,
externally fixed
transfer of
thermo/
equalizing
conductor via
copper material
at constant
thermostat
temperature
Sensor 1: Relevant for
Reference external
point ext. reference point,
information on
constant
external
reference point
temperature
Sensor 2: Select sensor
Sensor model type:
Sensor 2: Sensor
Type of connection type
connection relevant for all
Pt, Ni, Cu
resistance
sensor types
52
DTM parameters HMI LCD display
parameters
<Device> <Device Device>
<Configuration> <Input Sensor 1> <Line
<Sensor 1 / Line Resistance>
Resistance>
<Device> <Device Device>
<Configuration> <Input Sensor 1>
<Sensor 1 / <Reference Point>
Reference Point>
<Device> <Device Device>
<Configuration> <Input Sensor 1>
<Sensor 1 / <Reference Point Ext.>
Reference
Point Temp.>
<Device> <Device Setup>
<Configuration>
<Input Sensor 2>
<Sensor 2 / Sensor
<Sensor Type>
Type>
<Device> <Device Setup>
<Configuration>
<Input Sensor 2>
<Sensor 2 /
<Connection Type>
Connection>
Effective range
0 ... max. 100 Ω
internal
without
externally - fixed
-50 ...100°C
Like sensor 1
Like sensor 1
TTF350
Safety information
Check safety
function
Check safety
function
Check safety
function
Safety function
relevant and
requires check of
following
input/output
assignments:
Sensor 2
Differential (S1-S2)
Differential (S1-S2)
Mean
Redundancy
Elec. reading 2
Safety function
relevant and
requires check of
following
input/output
assignments:
Sensor 2
Differential (S1-S2)
Differential (S2-S1)
Mean
Redundancy
Elec. reading 2
OI/TTF350-EN