Theory
91369 Service Manual 3-4
Connector , Synchronous Data Link Control (SDLC) interface, is electrically compatible with the EIA-RS485
standard. The communications protocol is derived from the IBM SDLC specification and uses its Non-Switched
Multipoint Half-Duplex configuration. This interface is compatible with all Spacelabs Healthcare modules,
Flexport interfaces, gas analyzers, telemetry receivers, and printers.
Connector
, alarm relay output, is compatible with third-party alarm devices that conform to the pinout shown
in the alarm relay schematics (refer to Alarm Relay on page 2-8).
Connector
, video output, is a standard 15-pin, high-density, D-Sub connector. The output to the display
includes H-sync and V-sync signals, allowing the use of a wide range of third-party displays.
Connector
, serial communications interface, conforms to the EIA-RS-232 standard. The baud rate and
number of start, stop, and parity bits are software programmable. The default is 9600 baud, 1 stop bit, 8 start
bits, and no parity bits.
Connector
, Universal Serial Bus (USB), follows the USB1.1 standard. These three ports provide power and
communications for USB peripherals, such as a keyboard, mouse, and barcode scanner, that are approved by
Spacelabs Healthcare.
Connector
, Ethernet, conforms to the IEEE 802.3 standard for 10/100BaseT.
External Controls
The power ON/OFF switch located on the front bezel is the only external control for the monitor.
Figure 2-4
on page 2-6
RJ 45
Ethernet – 10/
100BaseT
1TD+
2TD-
3 RD+
4NC
5NC
6 RD-
Yellow LED ON = 100 Mhz
OFF = 10 Mhz
Green LED Link/Activity
Table 1: External Connectors (continued)
Reference Connector Description Pinout
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