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2-15
91390 QUBE
S ETUP
SDLC Cable Interconnection
To ensure Electromagnetic interference (EMI) compliance, the
appropriate Spacelabs Healthcare 9-pin connector must be used.
Refer to the Module Housing Service Manual (P/N 070-0680-xx).
SDLC Bus Termination
The SDLC bus must be properly terminated for correct operation. If
no external devices (for example, Flexports or multigas analyzers)
are connected, proper termination of the SDLC bus is accomplished
automatically. If external devices are connected, the switch on the
module housing farthest from the monitor must be set to the
terminated ( ) position. All others must be set to the non-
terminated ( ) position. The SDLC clock and data signals are
switched by the terminator switches and are not present
“downstream” of any switch set to the position.
Figure 2-11 Terminator switch settings
Because bus termination is handled by setting the switches
appropriately, an external terminator is only required when external
devices are connected.
If external devices are connected, an external cable terminator is
required to terminate the SDLC bus. This must be installed at the
end of the SDLC bus (following the last external device). In this case,
all module housings must have their switches in the position.
Note:
Flexports require a powered Flexport cable (P/N 012-0555-00)
when used with the 90499 module housing. SDLC data is only
passed along to the external device or devices when the
terminator switch (SW2) is in the position.
Alarm Relay for option A
Alarm output signals are available at the Nurse Alert ( )
connector instantaneously when an alarm occurs. Table 2-3
describes the connector pinouts for remote alarms. Figure 2-12 on
page 2-16, Figure 2-13 on page 2-16, and Figure 2-14 on page 2-17
illustrate the circuits for each alarm function.
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