The Keysight 34922A is a high-density, 70-channel multiplexer module designed for the 34980A Multifunction Switch/Measure Unit. It features low-thermal armature latching relays, offering fast scan rates up to 120 channels per second, ideal for high-density automated test applications.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Two 78-pin D-sub male connectors, backplane interface to Keysight 34980A mainframe |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly via the Keysight 34980A mainframe backplane |
| Operating Temperature | 0 °C to 55 °C |
| Weight | 0.27 kg |
General & Configuration
| Parameter | Value |
|---|---|
| Number of Channels | 70 (2-wire) or 35 (4-wire) |
| Multiplexer Topology | Two banks of 35 channels |
| Relay Type | Armature latching |
| Compatible Mainframe | Keysight 34980A |
Voltage & Current Ratings
| Parameter | Value |
|---|---|
| Maximum Switching Voltage | 300 V DC or AC RMS |
| Maximum Switching Current | 1 A |
| Maximum Carry Current | 2 A |
| Maximum Switching Power | 60 W (DC), 62.5 VA (AC) |
| Maximum Terminal Voltage to Earth | 300 V CAT I |
Signal Integrity & DC Performance
| Parameter | Value |
|---|---|
| Thermal EMF | < 3 uV (typical, 2-wire differential) |
| Initial Contact Resistance | < 1.5 Ohm |
| Channel-to-Channel Isolation | > 10^10 Ohm |
AC Performance
| Parameter | Value |
|---|---|
| AC Bandwidth | 25 MHz (typical, 50 Ohm system) |
| Crosstalk @ 1 MHz | -45 dB (typical) |
| Crosstalk @ 100 kHz | -65 dB (typical) |
Timing & Speed
| Parameter | Value |
|---|---|
| Maximum Scan Rate | 120 channels/s |
| Relay Switch Time | 4 ms (typical, including settling) |
Reliability & Lifespan
| Parameter | Value |
|---|---|
| Mechanical Relay Life | 100,000,000 cycles |
| Electrical Relay Life (Low Load) | 10,000,000 cycles |
| Electrical Relay Life (Full Load) | 100,000 cycles |
| Relay Cycle Counter | Yes (stored in non-volatile memory) |
Connectivity & Accessories
| Parameter | Value |
|---|---|
| Terminal Block Accessory | 34922T |
| Module Connector Type | Two 78-pin D-sub male |
Electrical Specifications
| Parameter | Value |
|---|---|
| Volt-Hertz Limit | 1 x 10^7 V-Hz |
| Transient Overvoltage Protection | 1500 Vpk |
Environmental & Storage
| Parameter | Value |
|---|---|
| Storage Temperature | -40°C to 70°C |
| Operating Humidity | 80% R.H. at 40°C (non-condensing) |
| Storage Humidity | 95% R.H. at 40°C (non-condensing) |
Configuration
| Parameter | Value |
|---|---|
| Multiplexer Configurations | 2-wire or 4-wire (software selectable) |
Connectivity
| Parameter | Value |
|---|---|
| Analog Bus Connection | No connection to internal analog buses |
Compliance & Safety
| Parameter | Value |
|---|---|
| Pollution Degree | Pollution Degree 2 |
Technology
Armature Relay
Applications
High-density data acquisition and signal routing