© 2018 imc Test & Measurement GmbH
imc C-SERIES - Manual, Version 4 R 3 - 2018-10-19
168 Pin configuration
7.1 Connecting DSUB-15 adapter plug
The Standard connector is a 1:1 DSUB-15 to screw
terminal adapter. It can be used for all modules which come
with the corresponding pin configuration. Apart from specific
labeling, those connectors are electrically identical.
The Special connector do not offer direct adaption from
the DSUB pins to the screw terminals, but instead come with
extra functions:
For current measurement (up to 50 mA) with voltage
channels the Shunt connector (ACC/DSUB(M)-I2 and I4)
have a built-in 50 Ω shunt. The scaling factor 0.02 A/V must
be set in order to display the current value.
For temperature measurements, a special, patented Thermo
connector (ACC/DSUB(M)-T4) is available. This DSUB-15
connector is suited for measurement of voltages as well as
temperatures with PT100 and thermocouples with
integrated cold junction compensation (CJC). Any types of
thermocouples can be connected at the differential inputs
(+IN and -IN). It also has additional “auxiliary contacts” for
connecting PT100 in 4-wire configurations, where the
reference current loop is already pre-wired internally.The
Thermo connector can also be used for normal voltage
measurement.
Plastic connector (ACC/DSUB-)
Metal connector (ACC/DSUBM-)
The Universal connector (ACC/DSUB(M)-UNI2) contains an additional built-in PT1000 temperature
sensor providing cold junction compensation (CJC) for thermocouple measurement. If this function is not
required, it is also possible to use a Standard connector for other measurement types.
The ICP connector (ACC/DSUB(M)-ICP2 and ICP4) provide a current supply source as well as a
capacitive coupling.
The TEDS connectors are special, TEDS capable (according to IEEE1451.4 for the use with imc Plug &
Measure) imc plugs for saving sensor information. The sensor-TEDS are serial PROMS which are
connected with an amplifier channel via a digital signal line (One-wire-PROM). For a detailed description
of the use of TEDS, see the imc STUDIO User's Manual.
Note on the screw terminals of the connector
To connect the measurement leads with the screw terminals, suitable leads should have a maximum cross section
of 1.5 mm
2
incl. cable end-sleeve. The terminals' screw heads only have secure electrical contact once they are
tightened to a connection wire. For this reason, a control measurement (for instance with multimeter probe tips)
at "open" terminals can falsely mimic a missing contact!
Cable shielding must be connected at CHASSIS (DSUB frame) as a rule. At some connectors,
V
CC
(5 V) is available, with a maximum load current of typically 135 mA per plug.
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