Connectors X5, X6 And X7; Input And Output Modules - Baer DLX User Manual

5.4.6

Connectors X5, X6 and X7

X5 (modem interface "Com2"): from page 84
X6 (data interface "Com1"):
X7 (data interface "Com2"):
5.4.7

Input and output modules

Input and output modules convert the pulse types and voltage levels of
commonly used signals in metering technology into TTL signals used by
the micro controller (and vice versa). At the same time these signals are
galvanically isolated from the process.
These types of input modules are available:
IES Pulse input S0
S0 inputs are active inputs, i.e. they not only supply the transmitter with a
signal voltage, but also with an auxiliary voltage. S0 transmitters can con-
tain their own electronic circuitry without the need to have their own power
supply. The relevant current and voltage limits are defined in DIN 43864.
S0 inputs are capable to deliver 10mA to an 800 Ω transmitter (to supply the
transmitter) and they still recognize a maximum current flow of 2.2mA as an
"Off" signal. They are limited to supplying a maximum voltage of 27V.
Therefore S0 inputs are well suited for simple potential free contacts and
passive transmitters using optical couplers or transistors and they are fre-
quently used for control signals (synchronization, rate control, resets etc.)
IEW Pulse inputs of type „wipe"
These inputs are passive inputs, i.e. they are supplied by the transmitter. A
metering pulse is transmitted directly as a voltage signal. In practice many dif-
ferent voltages and currents are used.
The input modules used can be operated with DC or AC signals from 24 to
265V. The maximum pulse frequency is at 10Hz, current consumption is less
than 10mA. Indefinite pulses (permanent contact) are permitted. This makes
IEW modules basically suitable for control signals.
IED Pulse inputs of type „bi-current / bi-polar"
"Bi-current" inputs are passive inputs, i.e. they are supplied by the pulse
transmitter. As such they are not linked to any voltage. „Bi-current" pulses
are DC voltage pulses of alternating polarity. A pulse is recognized by the
transgression of the 0V level. Instead of DC voltage pulses a permanent
DC voltage that changes its polarity for each pulse, can also be used. The
standard voltage is 24V, but it can vary from 18V to 60V. Our bi-current
pulse inputs have an input current of less than 2mA at 24V. As each input
pulse is represented by a change of polarity of the input voltage, our IED
modules internally produce a complete pulse of typically 20msec duration
for each change of polarity. This needs to be taken into consideration for
the maximum pulse frequency (max. 20Hz). If desired, IED modules with
90msec are available, which can be used up to 6Hz pulse frequency. Bi-
current transmission lines are highly immune to disturbances and should be
used for long distance transmissions. Depending on the environment
from page 79
from page 79, for 19"-rack only
49