Lake Shore Cryotronics, Inc. 575 McCorkle Blvd Westerville, Ohio 43082
Tel: (614) 891-2244 Fax: (614) 818-1600 e-mail:
www.lakeshore.com
F023-07-00
Revision
A
1/24/2008
Model 340 Input Option Card Installation
Field Installation
Input option card kit:
(1) 10-conductor ribbon cable
(1) Option card
(4) 32 mm (1.25 in) metal standoffs
(8) 4-40 machine screws
SIDE COVER
SCREWS
(On Both Sides)
REAR PLASTIC
BEZEL
TOP COVER SCREWS
(Remove bottom
cover screws also)
To remove top
and bottom
covers, slide
them to the rear
on the tracks.
DIGITAL I/O
ANALOG
OUT 1
ANALOG
OUT 2
SERIAL I/O
120
IEEE-488 INTERFACE
SH1 AH1 T5 L4 SR1 RL1 PP0 DC1 DT0 C0 E1
RELAYS
NC C NO NC C NO
LO
HI
HEATER FUSE
2.5 A
HEATER OUTPUT
LO
HI
DATA CARD
FUSE
DATA
-10% +5%
50-60 Hz
175 VA MAX
LINE
100 / 120
2.0 A
.25x1.25in SB
220 / 240
1.0 A
5x25mm SB
OFF
ON
INPUT A
l+
V+
l-
V-
INPUT B
l+
V+
l-
V-
60V MAX
WARNING
NO USER SERVICEABLE PARTS INSIDE. REFER
SERVICING TO TRAINED SERVICE PERSONNEL.
!
WARNING
FOR CONT5INUED PROTECTION AGAINST FIRE HAZARD,
REPLACE FUSE WITH SAME TYPE AND RATING.
!
EXT
REAR PANEL
OPTION PLATE SCREWS
OPTION PLATE
Figure 1. Cover and Option Plate Screws
HOLE #4
HOLE #3
HOLE #1
HOLE #2
IGNORE
ANALOG OPTION PLUG
TRANSFORMER ASSEMBLY
ARROW
NUB
PLUG
SLOT
Figure 2. Model 340 Mounting Holes
and Analog Option Plug
Required tools:
Small Phillips-head screwdriver and
5/64-inch Allen wrench
CAUTION: The components on this board are
electrostatic discharge sensitive (ESDS)
devices. Wear shock-proof wrist straps
(resistor limited to <5 mA) to prevent injury to
service personnel and to avoid inducing an
electrostatic discharge (ESD) into the device.
1. Turn Model 340 power switch OFF. Unplug power cord
from wall outlet, then instrument.
2. Stand the unit on its face. Use the Allen wrench to
remove the 4 screws on each side of the covers
(Figure 1).
3. Use the small Phillips screwdriver to remove any top
and bottom cover screws; instrument may have 1 or 2
screws on the top and bottom covers.
4. Remove rear plastic bezel. The covers are tracked.
Slide the top and bottom covers to the rear on the
tracks to remove them.
5. Remove rear panel option plate screws and set aside.
Remove rear panel option plate.
6. With the instrument still standing on its face, turn it to
view the inside circuit board. The upper half of the
circuit board above the transformer assembly contains
four holes where metal standoffs install (Figure 2).
Find Hole #1 to the left between C245 and C265.
Find Hole #2 114 mm (4.5 in) to the right of Hole #1,
and just to the left of C298 and U154.
Find Hole #3 114 mm (4.5 in) to the right of Hole #2,
and just to the left and below the Digital Option plug
(J9).
Find Hole #4 64 mm (2.5 in) above Hole #3, just to the
left and above the digital option plug (J9). Ignore hole to
left and beneath Hole #4.
Into each hole, insert a 4-40 screw through the bottom
of the circuit board, and thread it into a metal standoff
on the top of the circuit board.
These instructions apply to 3462,
3464, 3465, and 3468 option cards
