Specifications

17
HP 44470A
• Designed for low channel count application
• Switching up to 2 A, 250 V
Description
The HP 44470A multiplexer module provides 10-
channel to switch both high and low input signals to a
common bus. It can switch signals up to 250 V, 2 A, and
60 W, or 125 VA per channel. This module exhibits low
thermal offset characteristics which make it ideal for
precision low level signal routing. It can be operated in
either a break-before-make mode or multiple channel
close mode. You can make 4-wire ohm measurements
by programming two HP 44470As to open/close in the
card pair mode. A screw terminal block is provided for
ease of wiring.
10-channel Multiplexer Module
HP 44470D
• Designed for low channel count application
• Switching up to 2 A, 250 V
Description
The HP 44470D multiplexer module provides 20-
channel to switch both high and low input signals to a
common bus. It can switch signals up to 250 V, 2 A, and
60 W, or 125 VA per channel. This module exhibits low
thermal offset characteristics which make it ideal for
precision low level signal routing. It can be operated in
either a break-before-make mode or multiple channel
close mode. You can make 4-wire ohm measurements
by programming two HP 44470Ds to open/close in the
card pair mode. A screw terminal block is provided for
ease of wiring.
20-channel Multiplexer Module
Specifications
General Specifications
Relays: Armature latching relay
Thermal Offset: <3µV /channel
Relay Life (mechanical): 10
8
Maximum Scan Rate: 43 ch/ sec
Input Characteristics
Maximum Current: 2A
Maximum Voltage: 250V
Maximum Power: 44470A 60W or 125VA
44470D 60W or 125VA
Initial Closed Channel Resistance: <1Ω
DC Isolation
Open Channel, Channel-Channel:
<(40°C, 60% RH) >10
11
Ω
HI-LO:
<(40°C, 60% RH) 44470A >10
10
Ω
44470D >5x10
10
Ω
Channel-Chassis:
<(40°C, 60% RH) 44470A >10
10
Ω
44470D >5x10
10
Ω
AC Isolation
Capacitance (with 1 channel closed):
Open Channel, Channel-Channel
44470A <5pF
44470D <7pF
HI-LO: <27pF
Channel-Chassis: <80pF
Insertion Loss ( with 50 Ω termination):
100kHz <0.20dB
1MHz <0.25dB
10MHz 44470A <0.50dB
44470D <1.20 dB
Crosstalk (with 50 Ω termination):
100kHz <-73dB
1MHz <-53dB
10MHz 44470A <-33dB
44470D <-31dB
Module accessories
HP 44480A Screw terminal block for HP 44470A
HP 44480B Screw terminal block for HP 44470D
Note: All voltage and current are in DC or AC RMS if not specified