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Lake Shore Cryotronics, Inc.  575 McCorkle Blvd  Westerville, Ohio 43082  

Tel: (614) 891-2244  Fax: (614) 818-1600  e-mail: 

service@lakeshore.com

  

www.lakeshore.com

 

 F023-07-00 

Revision 

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

 

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