The Yokogawa 701255 is a 2-channel analog voltage input module built for high-speed data acquisition on Yokogawa ScopeCorder and data acquisition platforms. Operating at 10 MS/s with 12-bit resolution and 3 MHz bandwidth, it captures rapidly changing signals with ±0.5% accuracy and low noise performance. The non-isolated module accepts AC, DC, and GND coupling through BNC connectors and features input impedance of 1 MΩ ±1% with approximately 35 pF capacitance. An integrated anti-aliasing filter provides selectable bandwidth limiting at OFF, 500 Hz, 5 kHz, 50 kHz, or 500 kHz to prevent aliasing artifacts.
Voltage measurement extends to 600 V when used with the optional 10:1 probe (model 700929). Vertical axis accuracy is specified as ±(0.5% of 10 div), with temperature coefficients of ±(0.05% of 10 div)/°C at the zero point and ±(0.02% of 10 div)/°C for gain (typical values). The module maintains signal integrity across its measurement range through careful analog design and filtering.
Technical Specifications
• Channels: 2
• Sampling Rate: 10 MS/s
• Resolution: 12-bit
• Bandwidth: 3 MHz
• Accuracy: ±0.5% (vertical axis: ±(0.5% of 10 div))
• Input Impedance: 1 MΩ ±1%, ~35 pF
• Input Coupling: AC, DC, GND
• Bandwidth Limit: OFF, 500 Hz, 5 kHz, 50 kHz, 500 kHz
• Maximum Voltage (with 10:1 probe): 600 V
• Temperature Coefficient — Zero Point: ±(0.05% of 10 div)/°C (typical)
• Temperature Coefficient — Gain: ±(0.02% of 10 div)/°C (typical)
• Input Connector: BNC (isolated type)
– Key Features
• Anti-aliasing filter integrated for signal conditioning
• Non-isolation module type for cost-effective integration
• Low-noise signal path optimized for precision measurement
• Flexible input coupling supports AC, DC, and grounded measurements
– Compatibility & Integration
The 701255 plugs directly into DL350, DL750, DL850, DL850 series, DL950 ScopeCorders, and the SL1000 high-speed data acquisition unit. Note: Certain units manufactured on or before July 2007 may require factory rework.
