frako EM-PQ 2300, Руководство по эксплуатации

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Installation Operating Manual EM-PQ 2300
21
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For highly flexible installation up to 40 m
Lapp UNITRONIC
(R)
BUS CAN UL/CSA (CMX) 2 × 2 × 0.25, Article No. 2170 273
Helukabel CAN BUS 4 × 1 × 0.50, Article No. 800685
5.1.5.3 Number of devices on the Display bus
A maximum of 7 devices plus one EM-FD 2500 Display or 6 devices plus two EM-FD 2500 Displays may be
connected to the same bus segment.
One EM-PQ 2300 can supply instrument power to one EM-FD 2500 Display, so that only one EM-FD 2500 may
be connected per EM-PQ 2300. No more EM-FD 2500 Display instruments may be connected than there are
EM-PQ 2300 or EM-MC 2200 devices connected on the Display bus.
5.1.5.4 Terminating resistors
A terminating resistor must be in the circuit at each end of the bus. With the EM-PQ 2300, this is done with the
configuration switch 1 (DIP switch 1). When this rocker switch is pressed down towards the base of the
instrument, the internal terminating resistor is switched in, otherwise the resistor is not in the circuit. Similarly, an
internal terminating resistor is also incorporated in the EM-FD 2500 Display. This resistor is activated with the
instrument's keys, as described in
Section 6.4 Terminating resistors on the Display bus, page 24.
5.1.6 Digital OUT 1/2
The EM-PQ 2300 has two digital outputs (standard S0 pulses as per DIN 43864), which can be
used to transmit status codes.
The assignment of status codes to the digital outputs is carried out using the FRAKO
configuration software Device Manager.
For technical data see Section 2, Technical data, page 7 ; for configuration see Section 7.2.1
Digital OUT 1/2, page 28 .
CAUTION!
Please pay attention to the following points when connecting the instrument:
- Common earth connection, also electrically connected with the digital inputs, analogue
outputs and temperature input
- If more than one external earthing connections are made, equalizing currents could flow
through them and cause damage to the EM-PQ 2300 or other devices connected to it.
5.1.7 Analog OUT 1/2
The EM-PQ 2300 has two analogue outputs, which can transmit measurement readings.
The assignment of measurement readings to the analogue outputs is carried out using the FRAKO
configuration software Device Manager.
For technical data see Section 2, Technical data, page 7 ; for configuration see Section 7.2.2 Analog
OUT 1/2 , page 28 .
CAUTION!
Please pay attention to the following points when connecting the instrument:
- Do not apply any voltages from other sources.
- Common earth connection, also electrically connected with the digital inputs, analogue
outputs and temperature input.
If more than one external earthing connections are made, equalizing currents could flow
through them and cause damage to the EM-PQ 2300 or other devices connected to it.
5.1.8 Digital IN 1/2, Trigger IN, tariff switching