Campbell Scientific DCDC18R Boost Regulator - Manual (Page 7)

DCDC18R Boost Converter
CAUTION
DC ONLY
SN:
Logan, Utah
MADE IN USA
CR5000
Measurement and Control System
H L 1
DIFF
1 2
H L
2
3 4
H L 3
5 6
H L 4
7 8
H L
5
9 10
H L 6
11 12
H L 7
13 14
H L
8
15 16
H L 9
17 18
H L 10
CS I/O
(OPTICALLY ISOLATED)
RS-232
COMPUTER
19 20
SE
H L
11
DIFF
21 22
H L 12
23 24
H L 13
25 26
H L
14
27 28
H L 15
29 30
H L
16
31 32
H L 17
33 34
H L 18
35 36
CONTROL I/O
CONTROL I/O POWER
UP GROUND
LUG
pc card
status
G
G 12V
12V
Hm
A B C D E F
J K L G H I
M N O
T U V P R S
W X Y
* / ) - + ( < = >
Spc Cap
$ Q Z
, ' _
1 2
PgUp
ENTER
BKSPC
SHIFT
ESC
PgDn
End
Del Ins
Graph/ char
3
4 5 6
7 8 9
0
CURSOR
ALPHA
POWER IN
11 - 16 VDC
H L
19
37 38
H L 20
39 40
SE
VX1 VX2 VX3 VX4 CAO1 CAO2 IX1 IX2 IX3 IX4 IXR P1 P1 C1 C2 C3 C4
G C6 C5 C7 C8 G G >2.0V <0.8V 5V 5V G SDI-12 12V G SDM-C2 SDM-C3 SDM-C1 G 12V G SW-12 SW-12 G
POWER OUT
MADE IN
USA
(11-16) V G 18V G
V in
DCDC18R
BOOST REGULA TOR
V out
FIGURE 3. DCDC18R on CR5000
The DCDC18R is installed near the datalogger, either on the side of the
datalogger (Figure 3) or to the back panel of the enclosure. The voltage input
is connected to 12 volts and ground from the supply source. The leads from
“V out” go to the charging input. The G lead from “V out” connects to either
charge input terminal and the 18 V lead connects to the other. The polarity of
the inputs does not matter.
4. Grounding
The datalogger must be grounded for its transient
protection to work. CONNECTIONS TO THE CHARGING
INPUT DO NOT PROPERLY GROUND THE
DATALOGGER. The Ground connection should be made
at the grounding lug on the wiring panel. Caution
A full-wave bridge rectifier is included on the CR3000, CR5000, and CR23X
LA bases and the PS100. This creates a diode drop (0.7 V) between the
datalogger ground and the return side of the charging input (Figure 4). If the
datalogger ground (ground lug) and the return side of the charging input (G
terminal of the DCDC18R) are tied together through a wire, then the return
current to the DCDC18R will flow through this wire rather than through the
diode in the bridge rectifier. This is a valid connection and does not cause
3