Detcon 440 - Manual (Page 12)

5.0 Star t-up
NOTE: Before applying power, check and make sure that all the wiring connections and external devices
are installed correctly.
NOTE: Applying power with devices hooked up incorrectly may cause damage to the equipment.
5.1 Power Switch Selections
Refer to Figure 6. For AC power, locate the V-SELECT switch (SW2) and select the appropriate voltage
setting. If the unit will be powered by AC voltage only, then the VAC power switch should be turned to
the ON position, and insure the VDC power switch (SW4) is in the OFF position. If the unit will be
powered by the end-user’s DC source (or by a solar-battery power source), then the VDC power switch
should be turned to ON and insure the VAC power switch is in the OFF position. If the unit is to be
powered by AC and DC sources simultaneously, then both power switches should be in the ON position.
The switches are located on the Motherboard, shown in Figure 4
EXTERNAL
AC IN
J8
J2
BATTERY
SW4
VDC
POWER
SWITCH
SW0V
+
PS2
SW1
VAC
POWER
SWITCH
VOLTAGE
SELECT
SW2
EXTERNAL
DC IN
SW3
Figure 6 Power Switch Configuration
NOTE: The unit may have the internal battery back-up option. If so, there is a switch to leave the battery
connected or disconnected. The battery will normally be connected. See Section 8.1 for details on the
Battery Back-up Option.
5.2 Applying Power
Connect power per Section 4.2.
With the AC or DC power source connected, turn the applicable power switches to the ON positions.
Verify that the Main Display LCD comes up displaying gas readings on the display. The readings on the
Main Display LCD should match with those of the Model 440 Controller.
Model 440-RD Operator Manual Rev. 1.0.2 Page 8 of 14