Keithley 2700, Service Manual

Page: 131 / 174

Specifications A-11
GENERAL
RELAY SWITCH CONFIGURATION: 40 independent channels of 1-
pole switching. Isolated from internal DMM.
CONTACT CONFIGURATION: 1 pole Form A.
RELAY TYPE: Latching electromechanical.
CONNECTOR TYPE: Two 50-pin female D-sub connectors.
INPUTS
MAXIMUM SIGNAL LEVEL: 300VDC or rms, 2A switched, 60W (DC,
resistive), 125VA (AC, resistive).
CONTACT LIFE: Cold Switching: 10 8 closures.
At Maximum Signal Levels: 10 5 closures.
CHANNEL RESISTANCE (per conductor): <1
Ω
.
CONTACT POTENTIAL:
≤
4µV per contact.
OFFSET CURRENT: <100pA.
ACTUATION TIME: 3ms.
ISOLATION: Channel to Channel: >10 9
Ω
, <50pF.
Common Mode: >10 9
Ω
, <100pF.
CROSSTALK (1MHz, 50
Ω
load): <–35dB.
INSERTION LOSS (50
Ω
source, 50
Ω
load): <0.3dB below 1MHz, <3dB
below 10MHz.
COMMON MODE VOLTAGE: 300V between any terminal and chassis.
ENVIRONMENTAL
OPERATING ENVIRONMENT: Specified for 0°C to 50°C.
Specified to 80% R.H. at 35°C.
STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: 0.45kg (1 lb).
Channel 1
IN
OUT
Channel 40
IN
OUT
(Channels 2–39)
7705 40-Channel Control Module