Keithley 7021 Instruction Manual page 8

M 7021 S
ODEL PECIFICATIONS
ANALOG MULTIPLEXER SPECIFICATIONS
MULTPLEXER CONFIGURATION: Independent 1 × 12 and 1 × 18
multiplex banks. Adjacent banks can be connected together.
Jumpers can be removed to isolate any bank from the backplane.
CONTACT CONFIGURATION: 2-pole Form A (HI, LO).
MAXIMUM SIGNAL: 110V DC, 110V rms, 155V peak between any
two inputs or chassis, 1A switched, 30VA (resistive load).
CONTACT LIFE: Cold Switching: 10
Maximum Signal Levels: 10
CHANNEL RESISTANCE (per conductor): <1.25Ω.
CONTACT POTENTIAL: <3µV per channel contact pair
<9µV per single contact
OFFSET CURRENT: <100pA.
ACTUATION TIME: <3ms.
ISOLATION: 1
Ω, <25pF.
Bank: >10 9
Ω, <50pF.
Channel to Channel: >10 9
Differential: Configured as 1×12: >10
Configured as 1×18: >10
Configured as 1×30: >10
Common Mode: Configured as 1×12: >10
Configured as 1×18: >10
Configured as 1×30: >10
CROSSTALK 1 (1MHz, 50Ω Load): <–40dB.
INSERTION LOSS 1 (50Ω Source, 50Ω Load): <0.25dB below 1MHz,
<3dB below 10MHz.
RELAY DRIVE CURRENT (per relay): 16mA.
Specifications apply with no more than one channel closed.
1
Multiplexer Configuration
Bank A
HI
LO
12 Channels
HI
LO
J
Bank B
HI
LO
18 Channels
HI
LO
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8 closures.
5 closures.
Ω, <100pF.
9
Ω, <150pF.
9
Ω, <200pF.
9
Ω, <200pF.
9
Ω, <250pF.
9
Ω, <350pF.
9
J
HI
HI
J
Output Backplane
LO
LO
J
J
HI
HI
J
Output Backplane
LO
LO
DIGITAL I/O SPECIFICATIONS
DIGITAL I/O CAPABILITY: 10 independent inputs.
10 independent outputs.
OUTPUT:
Configuration: 10 open collector drivers with factory installed
10kΩ pull-up resistors. Each driver has an internal flyback diode.
Pull-Up Voltage: 5V internally supplied, external connection pro-
vided for user supplied voltage up to 42V max. Outputs short cir-
cuit protected up to 25V.
Maximum Sink Current: Per Channel: 250mA.
Per Card: 1A.
Logic: Hardware user configurable for negative or positive true
logic levels.
INPUT:
Configuration: 10 inputs with internal 10kΩ pull-up resistors
provided. Input resistors can be set for pull-up or pull-down
configuration.
MAXIMUM VOLTAGE LEVEL: 42V peak.
LOGIC: Positive true.
GENERAL
CONNECTOR TYPE: 96-pin male DIN connector.
ENVIRONMENT: Operating: 0° to 50°C, up to 35°C <80% RH.
Storage: –25° to 65°C.
EMC: Conforms with European Union Directive 89/336/EEC
EN 55011, EN 50082-1, EN 61000-3-2 and 61000-3-3, FCC part 15
class B.
SAFETY: Conforms with European Union Directive 73/23/EEC
EN 61010-1, UL 3111-1.
Specifications subject to change without notice.
Digital I/O Configuration
5V V
EXT
10K
Output
GND
Output Channel 1 of 10
5V
10K
Input
10K
GND
Input Channel 1 of 10