6
RTW 300W 042111
FIGURE 4. LOCATIONS OF OPERATING CONTROLS, INDICATORS AND TERMINALS
TABLE 3. FUNCTION OF CONTROLS, INDICATORS AND TERMINALS
FIG. 4
INDEX
NO.
CONTROL, INDICATOR,
TERMINAL
FUNCTION
1, 2
DC Output (+, –)
Connect to load (see Figure 7).
3
Output Voltage Trim Adjust (Vadj)
Adjusts output voltage.
4, 5
Sense (+S, –S)
Used to compensate for voltage drop in the connecting lines from the output terminal
to a load; they are connected to ± DC Output terminals for local sensing (see Figure
7).
6
Ground (earth)
Connect to earth ground. This terminal is connected to the chassis.
7
A-C Input (L)
Connect to AC: 100 to 240V input line.
8
A-C Input (N)
Connect to AC: 100 to 240V input line.
9
Output Voltage On indicator
(green)
Green LED lights when output voltage is present.
10, 11
Connector CN3, CN2
(See Table 4 for mating connector
part numbers.)
–RC (pin 1) and +RC (pin 2) provide Remote ON-OFF. Output is turned ON-OFF by
shorting-opening the RC pins (output OFF when open). Normally, ±RC pins are
shorted with a shorting connector (see PAR. 4.3).
CB (Current Balance, pin 3) is used when several power supplies are connected in
parallel (see PAR. 6.3).
RV (Remote Voltage, pin 4) is used for remotely controlling output voltage (see PAR.
4.2).
–S (pin 5) –Signal common functions as the common return for connection of multiple
units. (see PAR’s 6.3 and 6.4.)
12
Connector CN1
–PF (pin 2) and +PF (pin 1) output an open logic signal if output voltage drops to 80%
or lower of a set voltage, or if output voltage is shut down due to overvoltage or over-
current protection. (see Figure 6).
Local Sensing Cable Kit
Connects ± DC Output to ±S for local sensing (see Figure 7).
Shorting Connector
Connects –RC (pin 1) and +RC (pin 2) of connector CN2 or CN3 when not using
remote ON-OFF.
NOTE Unit is shipped with a shorting connector on CN 2
which coRC to –RC (see PAR. 4.3) and with
local sensing cables installed (coDC Output to
+S and –DC Output to –S) (see PAR. 6.2).
2
3
4
5
6
7
8
9
10
11
12
5
1
5
1
2 1
2
3
4
2
3
4
CN3 CN2 CN1
1
+
+
–
–
+S
–S
L
N
CN1
PIN
FUNCTION
1
–PF
2
+PF
CN2, 3
PIN
FUNCTION
1
–RC
2
+RC
3
CB
4
RV
5
-S
3043020
