HSF (M) 600W 042315
11
FIGURE 8. DIP SWITCH SETTINGS FOR VDC ON/ALARM POWER OPTIONS
3.5
REMOTE ON-OFF
When power is ON at the source, the output may be turned ON or OFF using the ±RC signals if
the remote ON-OFF feature is enabled. Note that when remote ON-OFF is enabled, the RESET
OUTPUT switch does not function. Remote ON-OFF is enabled by setting DIP switch positions 3
and 4 as shown in Figure 9B. The +RC and –RC signals (at the rack adapter I/O connector, pins
15 and 8, respectively) then turn the unit on or off. These pins accept a logic level (2.4V to 24V
“high” and 0.0 to 0.4V “low”), or a contact closure. When the ±RC pins are open, using either a
mechanical switch or a high level logic signal, the HSF 600W output is cut OFF. When the ±RC
pins are shorted, the output returns to within specifications. At low level logic, the maximum
source current is 1.6mA and at high level the sink current is 1.0mA. Positions 3 and 4 of both DIP
switches must be restored to the factory default setting (Figure 9A) if remote ON-OFF is not used.
The ±RC pins are isolated from DC output pins and a-c input terminals.
FIGURE 9. DIP SWITCH SETTINGS FOR USING RESET BUTTON OR REMOTE ON-OFF
TABLE 5. MZ MODELS: CONDITIONS FOR VDC ON/ALARM LED
OPERATION POWERED BY OUTPUT
CONDITION
MODEL:
HSF 12-53M
HSF 15-43M
HSF 24-27M
HSF 28-23M
HSF 48-13M
Minimum HSF output voltage required for VDC ON
LED to function when SW 2 position 8 is ON and SW 1
position 7 is OFF (Volts d-c)
3.3
3.5
4.5
5
8
3043747
7
7 DC ON PWR BY REF
7
SW1
8
SW2
8
OFF
ON
OFF
ON
USE REFERENCE SUPPLY
(FACTORY DEFAULT)
TO POWER "DC ON"
A
TO POWER "DC ON"
USE HSF OUTPUT VOLTAGE
B
(REQUIRES MINIMUM OUTPUT VOLTAGE)
7
8
8
SW1
7
SW2
OFF
ON
ON
OFF
DC ON PWR BY OUTPUT V 8
8
7
7
8
8
7
TAB
3042877
3
3 +RC
+RC 3
3
SW1
-RC 4
4
SW2
4
4 -RC
OFF
ON
OFF
ON
(FACTORY DEFAULT)
USE FRONT PANEL
RESET BUTTON
A
B
(LOGICAL LEVEL OR
MECHANICAL SWITCH)
USE REMOTE ON-OFF
3
3
SW2
SW1
4
4
ON
OFF
OFF
ON
3 +RC
4 -RC
+RC 3
-RC 4
TAB
