Federal Signal Corporation G-SND, Руководство пользователя

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Federal Signal signaling.fedsig.com
Preparing to Wire the Ex d Flameproof Models
SHOCK HAZARD - To avoid electrical shock hazards, do not connect wires when power is applied. Failure to observe this
warning may lead to serious injury or death.
CIRCUIT BOARD DAMAGE - The DC sounders are polarity sensitive and MAY BE DAMAGED by incorrect electrical
hookup. When connecting the DC sounder to the voltage supply lines, POLARITY MUST BE OBSERVED. In addition,
damage will result if the voltage rating of the particular model is exceeded by more than 10 percent.
This section has wiring instructions for the flameproof models G-SND 24 Vdc, 120 Vac, 220-240 Vac.
Ex d units are supplied with an eleven-position PCB-mounted screw terminal block. The maximum wire gauge is 4 mm
(12 AWG). The wire must be rated 85°C or higher. Use only stranded cable to terminate the sounder. The cross-sectional
area of the primary earth (ground) must equal the cross-sectional area of the phase conductor.
Cable termination for these models should be in accordance with specifications applying to the application. It is
recommended that all cables and cores be fully identified. Use the appropriate cable gland for the application. Gland
entry threads are M20-1.5 x 6H.
Tools needed:
• 1.5 mm A/F hexagon key
• 2 mm flat-tip screwdriver
• No. 1 Phillips
®
screwdriver
• Wire stripper
Figure 6 Ex d in/out PCB connections
VOLTAGE
SELECTOR
SWITCH
D8
D2
D1
D4
D3
J1
F1
S1 S2
F2
D7 D5 D6
R1
DC
120
230
AC
T4 T3 T2 T1 SEL EARTH L2 L2 L1 L1
Wiring the Ex d Models
To wire the Ex d flameproof sounder:
1. Unscrew the M3 hex set screw on the side of the housing one full turn.
2. Remove the cover from the housing by turning the cover counterclockwise. Three 120-degree spaced reliefs are
provided for a 3/8-inch spanner wrench if needed. If the cover will not unscrew, back out the set screw a few
additional turns.
3. Loosen the captive Phillips
®
screw retaining the driver/printed circuit board (PCB).
4. Slide out the PCB until the terminals clear the housing. Strip the wire insulation 6.5 mm (0.25 in). Maximum screw
tightening torque is 0.5 N•m (4.5 in-lb).