3500/61-04-01 Bently Nevada Recorder Output Monitor

Bently Nevada 3500/61-04-01 | Isolated TC Monitor | External Termination

Manufacturer: Bently Nevada | Product No.: 3500/61-04-01 | Type: Temperature Monitor with Recorder Outputs | Approval: CSA/NRTL/C (Class I, Division 2) | Made in: U.S.A.

I/O Module Configuration

• I/O Module Type: 04 = TC Isolated I/O Module with External Terminations
• Agency Approval: 01 = CSA/NRTL/C (Class I, Division 2)

Power and Input Specifications

• Power Consumption: 9 Watts nominal
• Input Channels: 1 to 6 RTD or Thermocouple signals
• Input Impedance: 10 MΩ per lead
• System Isolation: 500 Vdc
• Channel-to-Channel Isolation: 250 Vdc

Thermocouple (TC) Input Ranges

• Type E: -100°C to +1000°C
• Type J: -18°C to +760°C
• Type K: -18°C to +1370°C
• Type T: -160°C to +400°C
• Type E Note: Above 35°C ambient, range reduces to -60°C to +1000°C. Do not configure below -60°C.

RTD Input Ranges

• Platinum (0.00385): -200°C to +850°C (Recommended)
• Platinum (0.00392): -200°C to +700°C
• Nickel (120Ω): -80°C to +260°C
• Copper (10Ω): -100°C to +260°C (Accuracy: ±3°C at 25°C)

Recorder Outputs

• Signal: 4 to 20 mA (proportional to full scale)
• Load Resistance: 0 to 600 Ω
• Voltage Compliance: 0 to +12 Vdc
• Resolution: 0.3662 µA per bit
• Accuracy: ±0.15% at room temperature, ±0.4% over full range
• Short Circuit Protection: Monitor unaffected by output shorts

Alarm Specifications

• Setpoints: Alert and Danger adjustable from 0 to 100% of full scale
• Alert Delay: 1 to 60 seconds (1 second intervals)
• Danger Delay: 1 to 60 seconds (0.5 second intervals)
• Alarm Accuracy: Within 0.13% of desired value
• Under and Over Alarms: Both available

Front Panel LEDs

• OK LED: Module operating properly
• TX/RX LED: Communication active with rack modules
• Bypass LED: Monitor in bypass mode

Accuracy at 25°C (External Termination Isolated)

• Bulkhead Rack: ±1°C (±1.8°F)
• Standard Rack: ±1°C (±1.8°F)
• Copper RTD: ±3°C at 25°C (±5.4°F at 77°F)
• Cold Junction Compensation: ±1°C at 25°C (±1.8°F at 77°F)

Environmental Limits

• Operating Temperature: -30°C to +65°C
• Storage Temperature: -40°C to +85°C

Physical Dimensions and Weight

• Monitor Module: 241.3 x 24.4 x 241.8 mm | 0.91 kg | 1 front slot
• I/O Module: 241.3 x 24.4 x 99.1 mm | 0.45 kg | 1 rear slot

Package and Shipping

• Includes: Monitor module + TC isolated I/O module (external termination)
• Total Weight: 1.36 kg | Carriers: FedEx, UPS, DHL (2-5 business days)

Frequently Asked Questions

• Q: What approval does the 3500/61-04-01 have?
  A: CSA/NRTL/C (Class I, Division 2) for North American hazardous locations. For international approvals (ATEX/IECEx), choose option 02 instead of 01.
• Q: What is external termination?
  A: External termination moves wiring connections outside the rack. This simplifies installation, maintenance, and troubleshooting without opening the rack.
• Q: What accuracy does this isolated external termination model provide?
  A: ±1°C at 25°C (±1.8°F at 77°F) in both bulkhead and standard racks - the highest accuracy available.
• Q: How many channels does this monitor support?
  A: The 3500/61 accepts 1 to 6 thermocouple or RTD transducer signals per module.
• Q: Which RTD type is recommended for best performance?
  A: Platinum RTD with alpha 0.00385. It is the worldwide industrial standard with the widest range (-200°C to +850°C).