MTL 8123-PL-QU Pulse and Quadrature Input Module

Overview

The MTL 8123-PL-QU is a high-performance 2-channel pulse and quadrature input module designed for the PAC8000 I/O system. It captures high-speed pulse signals and quadrature encoder inputs from industrial devices such as flow meters, proximity sensors, and rotary encoders. This module ensures precise monitoring and control in automation applications, including hazardous areas (Zone 0 / Div 1 and Zone 2 / Div 2).

Technical Specifications

• Model Number: MTL 8123-PL-QU
• Input Channels: 2 pulse input channels or 1 quadrature input
• Frequency Range: 1 Hz to 50 kHz (12.5 kHz in quadrature mode)
• Accuracy: ±0.05% of span @ 25°C
• Temperature Stability: 0.005% per °C
• Supported Sensor Types: NAMUR, current pulse, voltage pulse, switch
• Input Voltage Range: 0–24 VDC (max 50 VDC)
• Input Current Range: Up to 20 mA
• Input Impedance: Voltage: >10 kΩ, Current: 25 Ω, NAMUR: 1 kΩ
• Switching Thresholds: NAMUR: 1.2 mA / 2.1 mA
• Pulse Counting: Count up/down with optional gate control
• Quadrature Mode: Direction detection enable/disable
• Filtering Options: Off, 1, 5, 20, 100 kHz
• Sample Period: Configurable from 20 ms to 200 s
• Alarms: Frequency and acceleration alarms with user-defined limits
• Output Channels: 2 open-collector outputs (max 30 V, 100 mA)
• Retransmission Bandwidth: 1–2000 Hz
• NAMUR Sensor Power Supply: 8.1 VDC nominal @ 8 mA
• Hazardous Area Rating: Zone 0 / Div 1, Zone 2 / Div 2
• Input Voltage: 85–265 V AC, 50–60 Hz
• Output Voltage: 24 V DC
• Output Current: 1.0 A
• Power Rating: 24 W
• Operating Temperature: -20°C to +60°C
• Mounting: DIN rail mountable
• Dimensions (H x W x D): 99 mm × 22.5 mm × 114.5 mm
• Weight: 0.5 kg