3.0 MECHANICAL ASSEMBLY AND INSTALLATION
3.1 SAFETY
CONSIDERATIONS
SIGNAL
WIRING: Do not make signal wiring connections or changes while
power is on.
RAIN OR MOISTURE: Do not expose the instrument to condensing
moisture.
FUMES AND GASES: Do not operate the instrument in the
presence of flammable gases or fumes.
EXERCISE CAUTION: As with any electronic instrument, high
voltages may be exposed when attempting to install, calibrate,
or remove parts of the meter.
3.2
MECHANICAL INSTALLATION
Rear view: Standard, integral mounting plate
Figure 3-1 Basic Mounting Configurations
The 509 is packaged in a small, rugged, die-cast, zinc-alloy case
designed to fit 3" I.D. or larger housings, requiring less
than 2" of height.
Three basic 509 configurations (509-1, 509-2, and 509-3) provide
mounting versatility.
The 509-1 provides for surface, track, or explosion-proof housing
mounting and is connected with a 3-terminal, #6 screw barrier strip
(beneath the display window).
The 509-2 is equipped with a 1/2" EMT conduit fitting on the case
side beneath the display. The fitting has two 0.3 millimeter long,
#18 stranded insulated wires passing through a neoprene moisture
plug for hookup to junction boxes with standard wire nuts.
The 509-3 is equipped with a 1/2" NPT conduit fitting on the case
side beneath the display. The fitting has two 0.3 mm long,
#18 stranded insulated wires passing through a neoprene moisture
plug for hookup to junction boxes with standard wire nuts.
3.3 STANDARD MOUNTING
Tapped holes on the back of the 509 case provide for custom mounting
to a flat surface; integral flanges on the back of the case provide
for standard 8TK2 relay track mounting. For flat surface mounting,
use #6 hardware. For 8TK2 relay track mounting, simply push
onto track.
The following optional adaptors provide additional mounting options:
- Adapter
plate for surface mount with two #8 front-entry screws through
keyhole slots or for push-mount into TR2/2TK relay track. (Option
MAT1)
- Rail clamp
for push mount onto DIN EN 50 022 relay track. (Option MDT1)
- Spring
retainers for mounting in 76.4 to 88.9 mm (3 to 3.5 in) inside
diameter explosion-proof housings. (Option MXS1)
- Wire brackets
for mounting the 508A above a transmitter in a single housing.
(Option MXS2)
ADAPTER MOUNTING
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RELAY TRACK MOUNTING
(FOR TR2/2TK TRACK R.D.I.)
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Figure
3-2 Surface and TR2/2TK Relay Track Mounting
(Option MAT1)
1. Position plate for desired application.
2. Use #6 hardware to mount plate to the back of the case.
HORIZONTAL TRACK
VERTICAL TRACK
Figure 3-3 DIN Track Mounting (Option
MDT1)
1. Position plate for desired track direction.
2. Use #6 flathead screws to mount plate to the back of the case.
3. Snap case assembly onto DIN rail.
Top View of Explosion-Proof Housing.
Unit and housing shown for reference only.
Spring Retainer for Explosion-Proof Housing
Figure 3-4. External Explosion-Proof
Housing Mounting
1. Position spring retainers across the back of the case.
2. Use wire protector feet (4 provided with Option MXS1) to hold
spring retainers in place.
3. Press case assembly into explosion-proof housing.
Figure
3-5. External Explosion-proof Housing Mounting
(Option MXS2)
1. Install brackets using #6 screws and flat washers.
2. Mount 509 above transmitter as shown in Figure 3-6.
3. Press wires to pass into housing.
Figure
3-6. External Explosion-proof Housing Mounting
(Option EPW2)
4.0 SIGNAL INPUT CONNECTIONS
WARNING: Input currents in excess of protective limits
can damage your meter.
4.1 509-1
The 509-1
has a 3-terminal barrier strip on the front of the case below
the display window. The signal inputs are marked with a "+"
or a "–" symbol. The third terminal (case ground) is marked
with a "/ / / " symbol. Use of a shielded cable, properly dressed,
is recommended.
4.2
509-2 and 509-3
Both the
509-2 and 509-3 come equipped with a male conduit fitting on
the side of the case. The 509-2 fitting is 1/2" EMT; the 509-3
fitting is 1/2" NPT. Each conduit fitting is plugged with a
rubber stopper. Two 0.3 millimeter long, #18 stranded insulated
wires are passed through each stopper. The two wires are white
and black. The black wire is the "+" signal input; the white
wire is the "–" signal input. Either unit can be hooked
up using standard wire nuts.
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Figure
4-1
509-1 Signal Connections
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Screw-Terminal
Pin Assignment
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1
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+
SIGNAL INPUT
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2
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–
SIGNAL INPUT
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3
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GROUND
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Figure
4-2
509-2 & 509-3 Signal Connections
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Terminal
Wire Assignment
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BLACK
WIRE
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+
SIGNAL INPUT
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WHITE
WIRE
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–
SIGNAL INPUT
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