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38 C578M-A (4/05)
For remote installation of the keyboard, the user must supply a cable of appropriate length that supports
the TIA/EIA-422-B (RS-422) communication standard. The example in Figure A4-6 shows a keyboard
placed 2,000 feet (610 m) from the CC1 via the user-supplied cable. Junction boxes (phone boxes) are
used to facilitate the RJ-45-to-cable connection points at either end of the run. Note that only signal
wires and ground are run through the cable itself (five of the six available wires are used in the
example). The transformer serves to pass on the data signal and to supply power to the keyboard at the
keyboard end.
Figure A4-6. Remote Wiring a CM9760-KBD
Although the communication link can be as far away as 4,000 feet (1,220 m) (per Figure A4-4), this is
theoretical and Pelco recommends that for distances greater than 2,000 feet (610 m) a
CM9505UPS-422 power supply with data repeater be used.
** RECOMMENDED CABLE:
BELDEN 9843 OR SIMILAR CABLE THAT SUPPORTS
THE TIA/EIA-422-B (RS-422) STANDARD.
THE CHARACTERISTICS OF THIS CABLE ARE
GIVEN IN TABLE A4-A.
PIN 1 OF RJ-45 INPUT JACK GOES TO TWP-1 (TERMINAL WIRING POST 1)
PIN 2 OF RJ-45 INPUT JACK GOES TO TWP-2 (TERMINAL WIRING POST 2)
AND SO ON
PHONE OR
JUNCTION BOX
(PELCO # CM9505J)
*CM9505J
PIN 1 PIN 8
DIRECTION OF PIN RUN
OF RJ-45 INPUT JACK
TWP 8
TWP 7
TWP 6
TWP 5
TWP 4
TWP 3
TWP 2
TWP 1
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SUPPLIED 25 FOOT,
FLAT CABLE
(REVERSE)
SUPPLIED 25 FOOT,
FLAT CABLE
(STRAIGHT)
CM9700-CC1
POWER
FOR
KEYBOARD
CM9760-KBD
CM9505UPS
CM9760-KBD
CM9505UPS
POWER
FOR
KEYBOARD
SUPPLIED 25 FOOT,
FLAT CABLE
(REVERSE)
SUPPLIED 25 FOOT,
FLAT CABLE
(STRAIGHT)
2,000 FOOT CABLE
**
PHONE OR
JUNCTION BOX
*
(CM9595J)
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CM9700-CC1