Section 3.2 - Connections (parallel units)

3-2
the lowest ID. Refer to the units’ manuals for full
details of setting the ID.
3.2 Connections (parallel units)
The RC-898 allows transport control of a unit con-
nected to the EXT 1 parallel port. Before making
this connection, check the specifications of the
other unit to ensure that the control pins available
match those provided by the RC-898, as shown
below in 3.2.2, “Parallel control/GPI pinout”.
If a passive unit that does not supply power to the
tally supply pin (8) is being used, switch 1
(TALL Y PO WER) of the RC-898 [45] must be set
on (down) to allow the RC-898 to provide this
power.

3.2.1 Connections (GPI event units)

The EXT 1 parallel port may also be used for the
purpose of controlling up to five GPI event-con-
trolled devices.
The way in which these devices may be triggered
from the RC-898 is explained in 9.2, “Controlling
GPI devices”.

3.2.2 Parallel control/GPI pinout

The following table gives the pin assignment s for
the parallel/GPI connector (EXT 1). GPI connec-
tions are shown in square brackets:
3.3 Connections (RS-422 units)
The RC-898 allows control of a unit implementing
the Sony P2 protocol. This connection is made
through the EXT 2 serial port [43], using a serial
cable designed for this purpose. The pinout for
this connector is as follows:
Make the connection using a cable designed for
RS-422 connection (check the pino ut of your P2
device before making the connecti on). This
machine may now be controlled by the RC-898
when the E2 MACHINE indicator [8] is lit.
3.4 A note on system clocks
When working with many digital audio units, all
these units must be fed from the same clo ck
source (either word or video). If this is not done,
there is a risk that speakers, etc. may be damaged.
Note that this clock master is entirely different
from the timecode master in a studio setup. It is
perfectly possible for a clock slave to be a time-
code master and vice versa.
Unit
How the ID is
set (see the
unit’s manual
for details )
DA-98 1 1 Menu system (see
9.2) ON
DA-88 0 1 Rotary switch on
rear panel (see p23–
24)
OFF
DA-38 1 1 Tape counter menu
system (see 7-2) ON
NOTE
When you set the machine IDs, you can set the ID of any
machine first, but we recommend doing this in a standard
sequence, working from the head of the chain to the tail.
NOTE
The RC-898 provides only transport control for a unit con-
nected to the parallel port. Functions such as track arming,
etc. are not possible when using the EXT 1 parallel port.
1STOP/[Event 1]
2PLAY/[Event 2]
3FF/[Event 3]
4REW/[Event 4]
5REC/[Event 5]
6N/C
7Common
8Tally supply
9PLAY tally
10 FF tally
11 REW tally
12 STOP tally
13 REC tally
14 REC COMMAND tally
15 GND
1Shield
2RX+
3TX–
4GND
5—
6GND
7RX–
8TX+
9Shield