Wiring Procedure; Connection Log - Keithley 7702 User Manual

Wiring procedure

WARNING The information in this section is intended for qualified service personnel. Do not
attempt to perform this procedure unless qualified to do so.
Use the following procedure to wire the Model 7700 module. Make all connections using correct wire size (up to 20 AWG).
Also, make sure to add supplementary insulation around the harness for voltages above 42V peak (see Figure 3).
WARNING All wiring must be rated for the maximum voltage in the system. For example, if 1000V
is applied to the front terminals of the Models 2700, 2701, or 2750, the plug-in module
wiring must be rated for 1000V.
1. Make sure all power is discharged from the Model 7700 module.
2. Access the screw terminals (see "Screw terminal access" located at the front of this document).
3. Using a small flat-blade screwdriver, loosen terminal screws and install wires as desired. (Figure 3 shows connections to
channels 1 and 2).
4. Route wire along wire-path and secure with cable tie as shown.
5. Fill in a copy of the connection log and affix it to the module cover.
6. Close and lock the cover.
Figure 3
Wire dressing — Model 7700

Connection log

Make a copy of Table 1 and affix it to the cover of the Model 7700. Use this to record connection information and channel
descriptions as needed.
4
H L H L H L H L
H L
H L H L H L
CH21 CH22 CH11 CH12 CH13
CH14
CH15 CH16
INPUT
(V,2 WIRE)
CH7 CH8 CH9 CH10
H L H L H L H L
INPUT
(V,2 WIRE)
SENSE
(OHMS, 4 WIRE)
H L H L H L H L
CH17 CH18 CH19 CH20
Cable tie
Supplementary
Insulation