Brandywine PDU-240 Manual de usuario
MANUAL P/N 900000154 REV A
User Guide
Pulse Distribution Unit
Model PDU-240
P/N 018000501
Revision B
June 2017
Brandywine Communications
1153 Warner Avenue
Tustin, CA 92780
(714) 755 1050
(714) 755 0175
http://www.brandywinecomm.com/
MANUAL P/N 900000154 REV B
2
Revision History
REVISION
DATE
COMMENTS
A
5-20-2016
Original release of PDU-240 user guide.
B
9-21-2017
Added information on fuse replacement
MANUAL P/N 900000154 REV B
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Safety Warnings
WARNING: This unit contains lethal AC voltages.
Disconnect the unit from the AC supply before removing
the cover.
WARNING:
The lightning flash with an arrowhead inside of an equilateral triangle is
intended to alert the user to the presence of un-insulated “dangerous
voltage” within the product’s enclosure. The “dangerous voltage” may be
of sufficient magnitude to constitute as a risk of electrical shock to people.
CAUTION:
The exclamation point inside of an equilateral triangle is intended to alert
the user to the presence of important operation and maintenance
instructions in the user guide.
MANUAL P/N 900000154 REV B
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Table of Contents
1 Specifications..................................................................................................5
1.1 Inputs........................................................................................................5
1.1.1 Reference Pulse Input......................................................................5
1.1.2 Fault Discrete (Optional)..................................................................5
1.1.3 Fault/Status.......................................................................................5
1.2 Outputs.....................................................................................................6
1.2.1 Reference Pulse Output...................................................................6
1.3 Switches and Indicators............................................................................7
1.3.1 Status LED Indicators......................................................................7
1.3.2 Environmental ..................................................................................7
1.3.3 Power ................................................................................................7
1.3.4 Physical.............................................................................................7
2 Option Configuration Sheet.............................................................................8
3 Unpacking and Installation ..............................................................................9
3.1 Unpacking.................................................................................................9
3.2 Installation.................................................................................................9
3.3 Connections............................................................................................10
3.3.1 Alarm Input Connection.................................................................10
4 Operation.......................................................................................................11
4.1 Powering the PDU-240...........................................................................11
4.2 Selecting the Input Reference.................................................................11
4.3 Fault Indicator.........................................................................................11
5 Maintenance and Troubleshooting ................................................................12
6 Calibration.....................................................................................................13
7 Drawings .......................................................................................................14
MANUAL P/N 900000154 REV B
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1 Specifications
1.1 Inputs
1.1.1 Reference Pulse Input
Pulse: 1 PPS through 10Mhz
Input Levels
o1 level : 2.5V min, 10.5V max
o0 level : 0.25V max
Input Impedance: 50 ohm or 10k ohm. Settable by link, see figure 1
Number of Inputs: 2 with auto selection and manual override from the
front panel toggle switch
Connector Type: BNC
1.1.2 Fault Discrete (Optional)
Number of Inputs: 2
Level: TTL
Active low
Forces a changeover when active for online reference
1.1.3 Fault/Status
Connector Type: DB-9 Female
Mating Connector: AMP P/N 747904-2
Figure 1
MANUAL P/N 900000154 REV B
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1.2 Outputs
1.2.1 Reference Pulse Output
Number of Outputs: 24
Connector Type: BNC
Output Protection: short circuit proof
Output Level: o1 level: 5V±5% into 50 ohms (10V ±5%
settable with link)
oOptional 1 level: 2.5V into 50 ohm
o0 level: 0.25V max into 50 ohm
Rise Times (10% to 90%)
o0-10V 20ns
o0-5V 15ns
o0-2.5V 10ns
Cross talk: -80 dBc
Spurious: -60dBc
Figure 2
MANUAL P/N 900000154 REV B
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1.3 Switches and Indicators
1.3.1 Status LED Indicators
Power (Green)
Reference Input A Available (Green)
Reference Input A Online (Green)
Reference Input B Available (Green)
Reference Input B Online (Green)
lAutomatic Reference Selection Selected (Green)
Fault (Red)
1.3.2 Environmental
Temperature:
oOperating: -30 to +60C
oStorage: -40 to +85C
Humidity: 10 - 95% non-condensing
1.3.3 Power
115/230 VAC 50/60 Hz
< 25 W
Fuse Value: T1, 250V, 1A
1.3.4 Physical
1.72” H x 14.5” D x 17.00” W and 1U 19” rack mount
Weight: 7.5 lbs nominal
1.3.5 Input detection time
Setting input available LED time.
oThe detection time in seconds can be adjusted for low frequency
pulses. Set with DIP switch on LED board. Figure 3
1PPS: default at 1 second
10PPS: set to 10 second
1PPM: set to 60 second
Figure 3
MANUAL P/N 900000154 REV B
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2 Option Configuration Sheet
Configuration Options
2.1 Base Unit
Part Number
2 switched input 24 output 10V level
018000501
2 switched input 24 output 5V levels
018000502
2 switched input 24 output 3.3V levels
018000503
2 independent input 12 output
Group 1 10V
Group 2 10V
018000504
2 independent input 12 output
Group 1 10V
Group 2 5V
018000505
2 independent input 12 output
Group 1 10V
Group 2 3V
018000506
2 independent input 12 output
Group 1 5V
Group 2 5V
018000507
2 independent input 12 output
Group 1 5V
Group 2 3V
018000508
2 independent input 12 output
Group 1 3V
Group 2 3V
018000509
Power Supply Options
85 - 265 VAC 50/60 Hz
018001000
36 - 72VDC Isolated
018001001
18 - 36VDC Isolated
018001002
9 - 18 VDC Isolated
018001003
MANUAL P/N 900000154 REV B
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3 Unpacking and Installation
3.1 Unpacking
Carefully remove the PDU-240 from its shipping carton. The following items
should be included in the shipment:
1 PDU-240
1 power cord
1 user guide
Note the power entry module on the rear of the PDU-240 chassis. Please take
note of the voltage displayed on the rear of the power entry module and verify
that the voltage matches the local line’s voltage.
WARNING:
REMOVE THE POWER CORD FROM THE PDU-240 BEFORE
ADJUSTING THE LINE VOLTAGE.
CAUTION:
THE PDU-240 WILL BE DAMAGED IF THE INCORRECT AC
LINE SETTING IS USED.
If the AC line setting is incorrect, detach the power cord from the power entry
module. Use a small screwdriver to lift up the fuse cover on the power entry
module to remove the fuse holder. Reverse the fuse holder and re-insert the
fuse holder, making sure that the correct AC line voltage is now displayed on the
rear panel.
3.2 Installation
The PDU-240 should be bolted directly into a 19” rack mount enclosure or
mounted on a shelf. The PDU-240 when fully populated has up to 27 cables
attached to the rear panel, therefore it is recommended that some appropriate
cable strain-relief system be used to support these cables, particularly when the
unit is not supported by a shelf.
MANUAL P/N 900000154 REV B
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3.3 Connections
Insert the power cord provided in the shipment into the rear power entry module.
Connect the input reference signals to the appropriate connectors on the rear
panel.
NOTE:
FOR CORRECT OPERATION, REFERENCE PULSE A
AND REFERENCE PULSE B MUST BE THE SAME
PULSE RATE, WHICH IS TYPICALLY 1 PPS.
Connect the output cables to the desired output connectors. Any unused
connectors may be left un-terminated.
3.3.1 Alarm Input Connection
The PDU-240 may be used with an external reference such as the Brandywine
Communications GPS8 or PTS system that incorporates a discrete alarm signal.
This alarm signal is used to indicate a fault (e.g. rubidium out of lock) on the
reference signal, although the 1 PPS input signals may be present.
The factory standard PDU-240 configuration is a logic HI signal on the ALARM IN
pin indicating that the input is GOOD. A built in pull-up resistor ensures that if no
ALARM IN connection is made the reference is considered good.
Este manual sirve para los siguientes modelos
1
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