Kollmorgen BDS5, Инструкция по установке и настройке

Страница: 43 / 150

BDS5 C
HAPTER
2 - I
NSTALLATION
2-7
amp models made have six units connected. Table 2.2
lists the ratings of the PSR4/5 logic power supplies.
Table 2.2. PSR4/5 Logic Power
VOLTAGE
CURRENT
(PER
AXIS)
BDS5
Connector
C4 PIN
PSR4/5
Connector
C2 PIN
+ 18 VDC
±
20%
0.25 AMP 1, 5 1, 5
- 18 VDC
±
20%
0.25 AMP 2, 6 2, 6
COMMON --- 3, 7 3, 7
+ 10 VDC
±
20%
1 AMP 4, 8 4, 8
LOGIC POWER SUPPLY MAXIMUM RATINGS
Failure to observe the polarity
of the logic power supply will
result in damage to the
PSR4/5 and BDS5
Connecting more than a total
of three units (either BDS4's
or BDS5's) to one PSR4/5 (12
& 20 amp models) can
damage the PSR4/5.
2.6.4 Wiring the BDS5 Front Panel
Connectors
This section will discuss wiring of the BDS5 front
panel connectors: C1, C2, C3, C4, C5, and C6 (C6 is
on 20 Amp units only). Mating connectors for C1-C6
are supplied with the BDS5.
2.6.4.1 Wiring C1, Encoder Equivalent
The Encoder Equivalent Connector connects encoder
inputs and encoder equivalent outputs. The BDS5
uses standard encoder format (A-B quadrature). This
format has excellent noise immunity because only one
channel changes at a time. As an option, pulse inputs
in different formats are also supported.
The Encoder Equivalent Connector is used for
master/slave systems. If your BDS5 is the slave axis,
then connect the output from the master to INA and
INB. If your BDS5 is the master axis, connect OUTA,
OUTB, and OUTZ to the inputs on the slave axies.
See Figure 2.2 and/or Drawing A-93103 for
connection diagrams.
All encoder signals are differential (as opposed to
single-ended) to increase noise immunity. This means
that each signal is transmitted with its logical inverse
(for example, OUTA and OUTA'). Logical inverse
means that if OUTA is 5 volts, then OUTA' is 0 volts
and that if OUTA is 0 volts, then OUTA' is 5 volts.
(Note that Drawing A-93103 shows the inverse of
OUTA as OUTA with a bar drawn directly above it;
here, the inverse of OUTA will be designated OUTA'.)
The encoder equivalent inputs and outputs conform to
RS-485. One standard RS-485 output can drive up to
32 standard RS-485 inputs, provided that the
interconnecting cable's capacitance is small enough.
Capacitance increases with cable length, which implies
that the transmitter (OUT's) and receivers (IN's)
should be as close to each other as is practical.
You should use 120 ohm cable. For longer distances
(over a 100 feet), consider using reduced capacitance
cables such as those available from Black Box
(Pittsburgh, PA). The cable should be run from point
to point, as opposed to branching out from a single
point. Branches could cause reflections (a
transmission line effect) that can interfere with the
signals. If the cable is very long, ringing (also a
transmission line effect) may occur. If this happens,
you should connect a 120 ohm resistor across each
signal and its logical inverse at both ends of the cable.
The Encoder Equivalent Connector uses RS-485
compatible 75174 line drivers and 75175 line
receivers, which are available from many IC
manufacturers, including Texas Instruments.
CAUTION
CAUTION