Keyence FS-MC8N 8-Output Amplifier Unit

Keyence FS-MC8N Multi-Output Unit

The FS-MC8N from Keyence is a multi-output unit designed for the FS-N40 fiber optic sensor amplifier series. Specifically, it collects detection signals from multiple amplifier units and routes them through a single compact module. This arrangement reduces wiring work in panels with many sensing points. Furthermore, the unit uses NPN open-collector outputs, which suit common PLC input configurations in Asian and European machinery.

Technical Specifications

The FS-MC8N provides eight separate control outputs and one common output. Besides, it includes one common input for external signals. Each control output is an NPN open-collector type rated at 30 V maximum and 20 mA maximum per output. Residual voltage is 1.4 V for NPN and 1.6 V for PNP variants. Additionally, the allowable passing current across the unit stays at 1,200 mA or less.

Expansion capacity reaches up to eight expansion units. However, a dual-output unit counts as two connections. Therefore, plan your channel count before wiring the system. For external input timing, the required input time equals the connected expansion units' input time plus 11 ms. This added delay comes from the internal signal processing of the multi-output module.

Indicators and Status Monitoring

Three LED indicators help technicians check system state quickly. First, the STATUS LED shows green or red to indicate normal or error conditions. Next, the MEMORY LED lights orange when memory functions are active. Finally, the LOCK LED glows orange when settings are locked. These indicators speed up troubleshooting during commissioning and maintenance.

Electrical Parameters

The supply voltage ranges from 10 to 30 VDC with 10% ripple P-P or less. A Class 2 or LPS source is required. Power consumption is 690 mW or less when solitary (26 mA at 24 V), excluding load current. Moreover, the unit has no built-in communication ports and supports no protocols. Therefore, it works as a pure signal-routing module rather than a networked device.

Mechanical and Environmental Data

The unit weighs approximately 110 g, heavier than single amplifier units because of its larger housing and multiple terminals. The operating temperature range is -20 to +55 °C with no freezing. Storage temperature, relative humidity, protection rating, and dimensions are not available in the current specification. Users should confirm panel space requirements before installation.

Installation Guide

First, mount the FS-MC8N onto a 35 mm DIN rail near the amplifier group. Next, connect the expansion cables from the amplifier units to the multi-output module. Then, wire the eight control outputs to the PLC input card. After that, connect the common input line if external triggering is needed. Finally, check the supply voltage and confirm all connectors sit firmly in place.

Keep output wiring separated from high-voltage cables to reduce noise. Also, verify the total passing current stays below 1,200 mA. For systems with many channels, group the FS-MC8N close to the amplifiers to shorten cable runs.

Packaging List

• Keyence FS-MC8N Multi-Output Unit × 1

• Mounting Clip × 1

• Instruction Manual × 1

Shipping is available via Fedex, UPS, and DHL.

FAQ

Q1: What is the main purpose of the FS-MC8N?
A: The FS-MC8N groups signals from multiple FS-N40 amplifiers into eight separate outputs. This reduces wiring and saves panel space.

Q2: How many expansion units can connect to the FS-MC8N?
A: You can connect up to eight expansion units. However, a dual-output unit counts as two connections.

Q3: What type of output does this unit provide?
A: It provides NPN open-collector outputs rated at 30 V and 20 mA maximum per channel.

Q4: Does the FS-MC8N support IO-Link or fieldbus protocols?
A: No. The FS-MC8N has no built-in ports and supports no communication protocols. It works as a signal-routing module only.

Q5: What is the maximum passing current for the unit?
A: The allowable passing current is 1,200 mA or less. Keep total load current below this limit for safe operation.