Справочник Пользователя для Pelco EH4018
Wire Gauge
Maxim
um distance fr
om transf
ormer to load
Table B. 24 VAC Wiring Distances
The following are the recommended maximum distances for 24 VAC applications and are calcu-
lated with a 10-percent voltage drop. (Ten percent is generally the maximum allowable voltage
drop for AC-powered devices.)
lated with a 10-percent voltage drop. (Ten percent is generally the maximum allowable voltage
drop for AC-powered devices.)
20
18
16
14
12
10
10
283 (86) 451 (137) 716 (218) 1,142 (348) 1,811 (551) 2,880 (877)
20
141 (42) 225 (68) 358 (109) 571 (174)
905 (275) 1,440 (438)
30
94 (28)
150 (45)
238 (72)
380 (115)
603 (183)
960 (292)
40
70 (21)
112 (34)
179 (54)
285 (86)
452 (137)
720 (219)
50
56 (17)
90 (27)
143 (43)
228 (69)
362 (110)
576 (175)
60
47 (14)
75 (22)
119 (36)
190 (57)
301 (91)
480 (146)
70
40 (12)
64 (19)
102 (31)
163 (49)
258 (78)
411 (125)
80
35 (10)
56 (17)
89 (27)
142 (43)
226 (68)
360 (109)
90
31 (9)
50 (15)
79 (24)
126 (38)
201 (61)
320 (97)
100
28 (8)
45 (13)
71 (21)
114 (34)
181 (55)
288 (87)
110
25 (7)
41 (12)
65 (19)
103 (31)
164 (49)
261 (79)
120
23 (7)
37 (11)
59 (17)
95 (28)
150 (45)
240 (73)
130
21 (6)
34 (10)
55 (16)
87 (26)
139 (42)
221 (67)
140
20 (6)
32 (9)
51 (15)
81 (24)
129 (39)
205 (62)
150
18 (5)
30 (9)
47 (14)
76 (23)
120 (36)
192 (58)
160
17 (5)
28 (8)
44 (13)
71 (21)
113 (34)
180 (54)
170
16 (4)
26 (7)
42 (12)
67 (20)
106 (32)
169 (51)
180
15 (4)
25 (7)
39 (11)
63 (19)
100 (30)
160 (48)
190
14 (4)
23 (7)
37 (11)
60 (18)
95 (28)
151 (46)
200
14 (4)
22 (6)
35 (10)
57 (17)
90 (27)
144 (43)
T
otal vA consumed
Table A. Video Coaxial Cable Wiring Distances
Cable Type*
Maximum Distance
RG59/U
750 ft (229 m)
RG6/U
1,000 ft (305 m)
RG11/U
1,500 ft (457 m)
* Minimum cable requirements:
75 ohms impedance
All-copper center conductor
All-copper braided shield with 95% braid coverage
All-copper center conductor
All-copper braided shield with 95% braid coverage
EXAMPLE:
An enclosure that
requires 80 vA and is installed
35 feet (10 m) from the trans-
former would require a minimum
wire gauge of 20 AWG.
35 feet (10 m) from the trans-
former would require a minimum
wire gauge of 20 AWG.
NOTE:
Distances are calculated
in feet; values in parentheses
are meters.
are meters.
MAINTENANCE
Regularly scheduled maintenance prolongs the operational life and appearance of the equipment.
Clean the window regularly with a mild, nonabrasive detergent in water and a soft cloth to main-
tain picture clarity.
tain picture clarity.
Service Manual
If you need to repair the camera enclosure, obtain a service manual in one of the following ways:
• Go to Pelco’s web site at
ftp://www.pelco.com
and find service manual C413SM.
• Call Pelco’s DataFax service at 1-559-292-0435 and request document number 24138.
• Contact Pelco’s Literature Department and request service manual C413SM.
• Contact Pelco’s Literature Department and request service manual C413SM.
9.
Adjust the glands for a tight fit around the cables.
10. Adjust the camera focus and iris if necessary. If you need to adjust the focus and iris manu-
ally, remove the front cover, adjust the focus and iris, and replace the front cover.
11. Adjust the pan and tilt of the mount, if applicable.