Communications Specialties FIBERLINK XRD-8050/RK Benutzerhandbuch - Seite 11

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Indicator LEDs

PWR
TD1, TD2
RD1, RD2
FAULT
The XRD-8050 is intended for use with CALTRANS 170 and 179 series as well
as NEMA type traffic signal controllers. As a result, the RS-232 "handshake"
signals have been configured for proper use with these units.
The tabulations below and on the following page indicate what to look for if the
system does not operate properly.
Pin
Description
1
Chassis Ground
2
Transmitted Data
3
Received Data
4
Request to Send
5
Clear to Send *
6
Data Set Ready
7
Signal Ground
8
Data Carrier Detect
20
Data Terminal Ready
*Clear to Send will only remain in this state if the anti-streaming timer has not
been triggered.

INTERFACE TROUBLESHOOTING

Indicates that operating power is applied to the XRD-8050
Indicates that a "high state" logic signal is being transmitted
Indicates that a "high state" logic signal is being received
Indicates that the ANTI-STREAMING timer has timed out
and that the unit is in the blocked state.
XRD-8050 in TRANSMIT MODE
(input/output)
(input)
(output)
(input)
(output)
(output)
(input/output)
(output)
(input)
10
Condition
0 VDC
Pulses at data rate
Undetermined
+3.75 to +15 VDC
+3.75 to +15 VDC
Same as Pin 20
0 VDC
+3.75 to +15 VDC
Jumpered to Pin 6