7
to the faulty controller will be affected. The other units in the system will
continue to operate normally. The DIP switch settings are as follows:
Optical Fiber Compatibility
Various versions of the XRD-8050 will successfully operate with most multi-
mode
or single-mode optical fibers. These versions are as follows:
XRD-8050-1
Multimode 62.5u Fiber
850nm
ST Connector
XRD-8050-3
Multimode 62.5u Fiber
1300nm
ST Connector
XRD-8050-7
Single-mode 8/10u Fiber
1300nm
FCPC Connector
XRD-8050-8
Single-mode 8/10u Fiber
1300nm
SMST Connector
Master/Local Selection and System Configuration
The XRD-8050 must be user-configured for MASTER or LOCAL operation.
DIP switch settings and an overall system configuration diagram are as follows:
For MASTER Operation: Set DIP Switch 1 and 3 OFF, 2 and 4 ON
For LOCAL Operation: Set DIP Switch 1 and 3 ON, 2 and 4 OFF
• DIP SWITCH 1 ON: 4 seconds
• DIP SWITCH 4 ON: 32 seconds
• DIP SWITCH 2 ON: 8 seconds
• DIP SWITCH 5 ON: 64 seconds
• DIP SWITCH 3 ON: 16 seconds
• DIP SWITCH 6 ON: Disabled
Be certain that only one DIP switch is turned ON at any time. All others should
be left in the OFF position.
10
Indicator LEDs
PWR
Indicates that operating power is applied to the XRD-8050
TD1, TD2
Indicates that a “high state” logic signal is being transmitted
RD1, RD2
Indicates that a “high state” logic signal is being received
FAULT
Indicates that the ANTI-STREAMING timer has timed out
and that the unit is in the blocked state.
INTERFACE TROUBLESHOOTING
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.
XRD-8050 in TRANSMIT MODE
Pin
Description
Condition
1
Chassis Ground
(input/output)
0 VDC
2
Transmitted Data
(input)
Pulses at data rate
3
Received Data
(output)
Undetermined
4
Request to Send
(input)
+3.75 to +15 VDC
5
Clear to Send *
(output)
+3.75 to +15 VDC
6
Data Set Ready
(output)
Same as Pin 20
7
Signal Ground
(input/output)
0 VDC
8
Data Carrier Detect
(output)
+3.75 to +15 VDC
20
Data Terminal Ready
(input)
Jumpered to Pin 6
*Clear to Send will only remain in this state if the anti-streaming timer has not
been triggered.
