Model 7021 Installation And Removal; Card Installation; Card Removal - Keithley 7021 Instruction Manual

Figure 4-19
Digital input, monitoring micro-switches

Model 7021 installation and removal

This following paragraphs explain how to install and remove
the Model 7021 card from the Model 7001/7002 mainframe.
WARNING
Installation or removal of the Model
7021 is to be performed by qualified ser-
vice personnel. Failure to recognize and
observe standard safety precautions
could result in personal injury or death.
CAUTION
To prevent contamination to the multi-
plexer card that could degrade perfor-
mance, only handle the card by the
edges and shields.

Card installation

Perform the following steps to install the Model 7021 card in
the Model 7001/7002 mainframe:
WARNING
Turn off power from all instrumentation
(including the Model 7001/7002 main-
frame) and disconnect their line cords.
Make sure all power is removed and
Screw
Figure 4-20
Model 7021 card installation in Model 7001
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1. Mate the connector card to the relay card if they are sep-
2. Facing the rear panel of the mainframe, select the slot
3. Referring to Figure 4-20, feed the Model 7021 card into
4. With the ejector arms in the unlocked position, push the
5. Install the screw shown in Figure 4-20.

Card removal

To remove the Model 7021 card, first unloosen the safety
ground screw, unlock the card by pulling the latches out-
ward, and then pull the card out of the mainframe. Remem-
Unlock card
Ejector
Arms (2)
Card Connections and Installation
stored energy in external circuitry is dis-
charged.
arated. Install the supplied 4-40 screw at the end of the
card to secure the assembly. Make sure to handle the
cards by the edges and shields to prevent contamination.
(CARD 1 or CARD 2) that you wish to install the Model
7021 card in.
the desired slot so the edges of the relay card ride in the
rails.
Model 7021 card all the way into the mainframe until
the arms engage into the ejector cups. Then push both
arms inward to lock the card into the mainframe.
WARNING
To avoid electric shock that could result
in injury or death, make sure to properly
install and tighten the safety ground
screw shown in Figure 4-20.
Screw
Lock card
4-17