3KP78 - 2.1
3000PLUS
WITH
5D78 I
NSTRUCTION
M
ANUAL V
. SB.3
2. C
ONNECTIONS
The 3000PLUS requires a user-supplied external
source of 24 VDC, regulated to ±10%. Nominal con-
sumption is 300 mA; maximum is 350 mA.* The figure
below shows how the positive and negative power
leads are tied, respectively to the rear-panel
+24 VDC
and
POWER COMMON
terminals. Local grounding is
not required.
NOTE: On every normal powerup, the 3000PLUS will
display (for two or three seconds) its
firmware version
number
(“V x.x”) alternating with
2.
A
P
OWER
C
ONNECTIONS
A
/
D
COM
OUT
COM
A
/
D
INP
V
OUT
4-20
OUT
LOG
COM
HLD
PEK
TAR
LOG
COM
RCV
XMT
PWR
COM
+24
VDC
HI
HI
LO
LO
OK
OK
HAV
PEK
RLS
LAT
24 VDC
POWER
SUPPLY
Fig. 6
3000PLUS Power
Connections
PLEASE NOTE: Some of the wiring diagrams in this section show only the male connector head-
ers on the rear of the 3000PLUS instrument (also shown in Fig. 3). Each connected wire or jumper
is to be firmly secured to the corresponding
SCREW TERMINAL
of the terminal block (supplied
with the meter) that plugs into the appropriate header.
C
ABLE
S
HIELDING
Proper shielding of cable wires or twisted pairs—as shown in Figs. 7 through 10—is strongly rec-
ommended to minimize the production of unwanted electrical noise from capacitive and inductive
effects.
In the I/O cabling diagrams below, only the “connector end” of each cable shield is shown, as rep-
resented by a gray circle surrounding either a single wire or a TWISTED PAIR of wires within the
cable. Unless otherwise stated, every shield should be grounded to the appropriate common or
ground terminal only at the connector end. The drain wire tying the connector end of the shield to
common/ground should be as short as possible.
* An optional 18-W in-line power supply for the 3000PLUS (the
Model 3KPS1
) is available from Daytronic. Contact the factory
for more information.
