The Keithley 3722 is a high-density, dual 1x48 multiplexer plug-in card designed for the Series 3700 and 3700A System Switch/Multimeter mainframes. Featuring 96 two-pole channels utilizing latching reed relays, it is optimized for high-speed, multi-channel switching applications requiring rapid actuation and long life.
Specifications
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to 50 °C |
| Dimensions (W×H×D) | 114 mm × 33 mm × 258 mm |
| Weight | 0.62 kg |
General & Configuration
| Parameter | Value |
|---|---|
| Module Type | Multiplexer Card |
| Number of Channels | 96 (2-pole) |
| Multiplexer Configuration | Dual 1x48, Single 1x96, or 1x48 (4-pole) |
| Contact Form | 2-pole Form A |
| Relay Type | Latching Reed |
| Compatible Mainframes | Keithley Series 3700, Series 3700A |
| Number of Slots Required | 1 |
DC Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Switching Voltage (DC) | 200 V |
| Maximum Switching Current (DC) | 1 A |
| Maximum Carry Current (DC) | 1 A |
| Maximum Switching Power (DC) | 10 W |
| Contact Resistance (Initial) | < 1.5 Ω |
| Contact Potential (Thermal EMF) | < 50 µV |
| Insulation Resistance | > 10^9 Ω |
AC Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Switching Voltage (AC RMS) | 141 V RMS (200 V peak) |
| Maximum Switching Current (AC RMS) | 1 A |
| Maximum Switching Power (AC) | 10 VA |
Timing & Relay Lifetime
| Parameter | Value |
|---|---|
| Actuate Time | < 1 ms |
| Release Time | < 1 ms |
| Mechanical Relay Life | 10^9 cycles |
Connectivity & Accessories
| Parameter | Value |
|---|---|
| Rear Panel Connector Type | Dual 78-pin D-sub (male) |
| Analog Backplane Connection Capability | Yes (automatic via backplane relays) |
| Supported Terminal Block Models | 3722-ST |
| Supported Cable Accessories | 3722-MTC-1.5 (1.5 m), 3722-MTC-3 (3 m) |
Environmental & Safety
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to 70 °C |
| Operating Humidity Range | Up to 80% R.H. @ 35 °C (non-condensing) |
AC Performance
| Parameter | Value |
|---|---|
| Bandwidth (Dual 1x48, 50 Ω load) | 4.5 MHz (typical) |
| Bandwidth (1x96, 50 Ω load) | 3.5 MHz (typical) |
| Crosstalk (100 kHz, 50 Ω load) | -60 dB (typical) |
| Crosstalk (1 MHz, 50 Ω load) | -40 dB (typical) |
| Isolation (100 kHz, 50 Ω load) | -65 dB (typical) |
| Isolation (1 MHz, 50 Ω load) | -45 dB (typical) |
Reliability
| Parameter | Value |
|---|---|
| Electrical Relay Life (10 V, 10 mA) | 10^8 operations |
| Electrical Relay Life (100 V, 10 mA) | 10^7 operations |
Safety
| Parameter | Value |
|---|---|
| Maximum Voltage to Earth Ground | 300 V |
Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Carry Current (AC) | 1 A |
| Maximum Voltage Between Any Two Terminals | 300 V DC or AC RMS |
Environmental
| Parameter | Value |
|---|---|
| Operating Altitude | Up to 2000 meters |
| Storage Altitude | Up to 4600 meters |
Compliance
| Parameter | Value |
|---|---|
| Safety Compliance | Conforms to European Union Low Voltage Directive |
| EMC Compliance | Conforms to European Union EMC Directive |
Technology
Latching Reed Relay
Applications
High-speed multi-channel scanning and multiplexing