sepam 20 user manual - Schneider Electric

PE50021
DE80121
Installation MET148-2
Temperature sensor module
1.81
mm
in
5.67
(1) 70 mm (2.8 in) with CCA77x cord connected.
PCRED301005EN - 06/2008
3.46
Function
The MET148-2 module can be used to connect 8 temperature sensors (RTDs)
of the same type:
b Pt100, Ni100 or Ni120 type RTDs, according to parameter setting
b 3-wire temperature sensors
b A single module for each Sepam series 20 base unit, to be connected by one of
the CCA770 (0.6 or 2 ft), CCA772 (2 m or 6.6 ft) or
CCA774 (4 m or 13.1 ft) cords
b 2 modules for each Sepam series 40 or series 80 base unit, to be connected by
CCA770 (0.6 or 2 ft), CCA772 (2 m or 6.6 ft) or CCA774 (4 m or 13.1 ft) cords
The temperature measurement (e.g. in a transformer or motor winding) is
utilized by the following protection functions:
b Thermal overload (to take ambient temperature into account)
b Temperature monitoring.
Characteristics
MET148-2 module
Weight 0.2 kg (0.441 lb)
Assembly On symmetrical DIN rail
Operating temperature -25°C to +70°C (-13°F to +158°F)
Environmental characteristics Same characteristics as Sepam base units
Temperature sensors Pt100 Ni100/Ni120
Isolation from earth None None
Current injected in RTD 4 mA 4 mA
Description and dimensions
A Terminal block for RTDs 1 to 4
B Terminal block for RTDs 5 to 8
Da RJ45 connector to connect the module to the base unit with a CCA77x cord
Dd RJ45 connector to link up the next remote module with a CCA77x cord
(according to application)
t Grounding/earthing terminal
1 Jumper for impedance matching with load resistor (Rc),
to be set to:
b Rc,
if the module is not the last interlinked module (default position)
b Rc, if the module is the last interlinked module.
2 Jumper used to select module number, to be set to:
b MET1: 1st MET148-2 module, to measure temperatures T1 to T8
(default position)
b MET2: 2nd MET148-2 module, to measure temperatures T9 to T16
(for Sepam series 40 and series 80 only).
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