The 85M-3811-T module from the ioPAC 8500/8600 Series is a high-precision 8-channel analog input module designed for demanding industrial and rail environments. It features differential voltage input channels with a range of 0 to 10 VDC, a 16-bit resolution, and high-speed sampling up to 40 kHz (total) or 5 kHz per channel. With accuracy rated at ±0.1% FSR at 25°C and ±0.3% across the full operating temperature, this module is ideal for applications requiring accurate and fast analog signal acquisition.

Each channel includes a 60 KB history buffer, capable of storing up to 6 seconds of continuous data at 5 kHz, enabling efficient data logging and diagnostic analysis. The spring-type Euroblock terminals and compact form factor ensure seamless integration into space-constrained control systems. The 85M-3811-T operates reliably in extreme temperatures and meets stringent standards for electromagnetic compatibility and rail safety.

Technical Specifications:

Analog Inputs:

• 8 differential channels
• Input voltage: 0 to 10 VDC
• Resolution: 16 bits
• Sampling rate: 40k samples/sec (total), 5k samples/sec per channel
• Input impedance: ≥ 20 MΩ
• Accuracy: ±0.1% FSR @ 25°C, ±0.3% FSR @ -40 to 75°C
• Data buffering: 60 KB per channel (6 seconds @ 5 kHz)
• Connector: Spring-type Euroblock

Isolation:

• 3 kVDC or 2 kVrms

Digital Output:

• Pulse output frequency: up to 5 kHz

Power:

• Power consumption: 521 mA @ 24 VDC

Physical Characteristics:

• Dimensions: 25 x 128.2 x 85.5 mm
• Weight: Under 80 g
• Wiring: I/O cable, 14 to 28 AWG

Environmental Limits:

• Operating temperature: -40 to 75°C
• Storage temperature: -40 to 85°C
• Humidity: 5 to 95% (non-condensing)
• Altitude: Up to 2000 m (contact Moxa for guaranteed performance above)

Certifications:

• EMC: EN 55032/24, EN 61000-6-2/-6-4
• EMI: CISPR 32, FCC Part 15B Class A
• EMS:
• ESD: 6 kV contact, 8 kV air
• RS: 5100–6000 MHz, 3 V/m
• EFT: 1 kV (power), 0.5 kV (signal)
• Surge: 2 kV (power), 1 kV (signal)
• CS: 10 V
• PFMF
• Railway: EN 50121-4, partially complies with EN 50155
• Safety: UL 508
• Shock: IEC 60068-2-27
• Vibration: IEC 60068-2-6

MTBF:

• 1,426,112 hours (Telcordia SR332)

Warranty:

• 5 years (see www.moxa.com/warranty)