Service manual

UCW and Ultraview 1700 Monitors — Service Manual
2-12
SDLC Bus Connections
The 90387 has two integral module slots providing plug-in support for either two single-high modules
or one double-high module. If additional modules are required, these are installed in external module
housings and connected to the 90387 by the SDLC interface.
The 90385 requires an external module housing for parameter module support. Flexport devices are
also connected by the SDLC interface. External module housings or Flexport devices require that
the SDLC bus be configured correctly.
The 90385/90387 support the 90491 four-slot external module housing, or the 90485/90499 two-slot
external module housings.
Multiple module housings may be used. They are interfaced to the 90385/90387 by daisy-chaining
them together to create an extended SDLC bus.
Maximum Cable Lengths
The following cables are limited to the indicated maximum length:
Ethernet Cable (10Base5) — 10Base5 cables have a maximum length of 164 feet (50 m)
including the total cable length from the monitor to the wall plate and/or transceiver, and a
35-foot (10 m) propagation delay for any Multiport present.
Ethernet Cable (10BaseT) — 10BaseT cables have a maximum length of 328 feet (100 m).
SDLC Cable — SDLC cables have a maximum length of 40 feet (12.2 m), including the total
SDLC cable length from the monitor to last device on the SDLC bus.
Video Display Cable — Video display cables have a maximum length of 100 feet (30.5 m),
including the total length of cable from the monitor to the last repeater display.
91416-B Touchscreen Cable — 91416-B touchscreen cables have a maximum length of 6 feet
(1.83 m).