The Agilent/Keysight N2261A is a general-purpose relay module housing 40 independent SPST latching relays for high-speed signal switching in automated test systems. The module supports simultaneous operation of up to 10 channels at a maximum scan rate of 80 channels/second, enabling efficient throughput in demanding test environments. Signal routing flexibility is provided through single-channel break-before-make (BBM) or multiple-channel open/close configuration modes. The N2261A operates under SCPI or 3488A emulation control and includes built-in relay cycle counters for usage monitoring.
Technical Specifications
Relay Performance
• 40 independent SPST latching relays
• Mechanical relay life: 10⁸ cycles
• Electrical relay life: 5 × 10⁵ cycles at 1 A load
• Maximum scan rate: 80 channels/second
• Simultaneous channel operation: up to 10 channels
• Initial closed channel resistance: < 0.5 Ω
Electrical Ratings (Per Channel)
• Maximum voltage: 200 V (DC or AC RMS)
• Maximum current: 1 A (DC or AC RMS)
• Maximum power: 60 W or 62.5 VA
Module Ratings
• Maximum current per module: 20 A
• Maximum power per module: 1200 W or 1250 VA
• Thermal offset: 10¹⁰ Ω at 40 °C, 50% RH
• DC isolation channel-to-chassis: > 10¹⁰ Ω at 40 °C, 50% RH
• AC isolation capacitance (channel-to-channel): < 10 pF
• AC isolation capacitance (channel-to-chassis): < 20 pF
RF Performance (50 Ω termination)
• Insertion loss at 100 kHz: < 0.10 dB
• Insertion loss at 1 MHz: < 0.20 dB
• Insertion loss at 10 MHz: < 0.50 dB
• Crosstalk at 100 kHz: < −70 dB
• Crosstalk at 1 MHz: < −50 dB
• Crosstalk at 10 MHz: < −30 dB
• Bandwidth: 10 MHz
– Key Features
• Armature latching relay design for stable switching
• Dual-pair signal switching via coordinated N2261A modules
• Independent channel control with high isolation
• Low thermal offset for precision measurement applications
– Typical Applications
• Automated test equipment (ATE) signal routing
• Multi-channel signal switching and matrix configurations
• DC and AC circuit validation
• RF and microwave test systems up to 10 MHz
– Compatibility & Integration
The module integrates with Keysight/Agilent test systems via SCPI and 3488A emulation modes. Optional terminal blocks and cable assemblies include the N2291A screw terminal block, N2296A crimp & insert terminal block, N2297A DIN96-to-Twin-D50 cable, and N2299A DIN96-to-Quad-D25 cable.
