Sennetech SCT-CRX-Pelco-Pelco User manual

+
_
Pelco
Data
Out
Power
Pwr Pwr
ConnectpowertothePwr
inputs. Do not connect
powerwirestotheGnd.
n.c.
Theremovablemounting
clipcanbesnappedontoa
din rail or screwed to a
panelor wall.
SCT-CRX-Pelco-Pelco
Pelco Coaxitron to Pelco RS-422 Code Translator
Size: 4.5" x 3.5" x 1.25"
Weight: 0.5 lb
Power: 9Volt to 15VoltAC or DC at 75ma
Environmental: Indooruseonly
Sennetech, Inc. 6455 W. Bath Rd. Perry, MI 48872 U.S.A. Ph [phone] Fax [phone]
The Code Translator detects Pelco coaxitron control code and converts it into Pelco RS-422 control
code for a single Pelco camera.
NOTE FOR NEWUNITS SHIPPED ONOR AFTER MARCH01, 2016: Forallnewunits,thebaud rate
selection switches now apply to both P code and D code. For units purchased before this date, the
baud rate selection switches apply only to P code (D code set at 2400 baud only).
Pelco
AddressSwitches
Therangeis 0~256
Aninvalidsettingwill
cause the Error in-
dicator to light up
solidly.
Tx
Indicator
Flashs when
Pelcocamera
control com-
mands are
sent.
Configuration Switches
Switch1: Output Code Type
Up: "P"Code
Down: "D"Code
Switches2&3: Baud Rate
2Down 3Down 2400
2 Up 3 Down 4800
2Down 3 Up 9600
2 Up 3 Up 19.2k
Switch4: "P" codeparity
Up: Evenparity
Down: Noparity
Switch5: Unassigned
Up:
Down:
Switch 6: Output Test Pattern
Up: TestOn
Down: TestOff
Removableedgeconnector.
Inserta small screwdriver in
theupperslottoforceopenthe
wireclamp.Pushallthewayin
to open fully. Place stripped
wireend(s)intheopenclamp
andwithdrawscrewdriver.
Error
Indicator
Lightssolidly
foranyinvalid
address
switch set-
ting.
Video
Indicator
Illuminates
when video
sync signal
isdetected.
SPECIFICATIONS
Rx
Indicator
Flashs when
coaxitroncon-
trol code is
detected.
Highimpedance looping
coaxialvideoconnectors.
www.sennetech.net

OPERATION
Operation of the coded translator is transparent to the user. The Pelco coaxitron is converted into
PelcoRS-422format.
TROUBLESHOOTING
Proper termination of the video cable is important for reliable coaxitron operation. Both the code
translatorandthedevicegeneratingthecoaxitron controlcodeneedtobesynchronizedtothecamera's
videosignal.Thecable should be terminated witha single75Wresistor.
Thevideo indicator will light whenthere isvideopresentfrom the camera onthe coaxialcable.
Whencoaxitroncontroldata is detected, the Rx indicator will light and the TX indicator will alsolightas
the Pelco RS-422 code is sent. While a camera is moving, the Rx indicator will continue to flash at a
highrate, but theTx indicator will onlyflash for new commandsor speed changes. Ifthe Rx indicator
flashesintermittantly, check forproper termination.
If an invalid Pelco address is selected, the error indicator will light until this is corrected.
Iftheindicatorsshownormaloperationbutthecameradoesnot respond, the data is either not getting
tothe camera or thecode translatorandcamera have different dataor addresssettings.
The test mode is useful for solving these problems. When the test switch is on, different code, baud
rate, and address settings can be selected to try to find a combination that works.
INSTALLATION
Insert the code translator in the video coaxial cable between the camera and the matrix. The video
inputs are a high impedance loop so either can be in or out. Connect the RS-422 output to the
camera's RS-422 in connectors. Set the output code type and baud rate to match the camera's
setting. The switches can be changed with power on and the changes take effect immediately.
Set address selector switches and the camera's address to the same number. With the test pattern
on, a counterclockwise square movement pattern is continuously sent to the camera. This can be
used to verify communication to the camera without a coaxitron input signal
RS-422 Control
Video
Video
Camera
SCM-CRX
Video
Pwr
RS-422 OUT Video Matrix
March 2016