Siemens MLC

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MXL Line Card
Installation Instructions
Model MLC
INTRODUCTION The Model MLC MXL Line Card loop driver from Siemens
Industry, Inc., is a module that allows MXL intelligent
addressable smoke detectors, manual stations, monitor
devices, and control devices to interface to the FireFinder-
XLS/Desigo Fire Safety Modular/Cerberus PRO Modular
System. The MLC uses two consecutive addresses on the
HNET network. The application program that is loaded into
the on-board microprocessor controls the MLC operation. An
XLS/Desigo Fire Safety Modular/Cerberus PRO Modular
system can support a maximum of 2500 MXL intelligent
field devices using up to 25 MLC cards.
The MLC contains nine diagnostic LEDs. Ground fault
detection is provided. A USB port is included to allow
firmware upload via the front panel.
All field devices connected to the MLC are addressed and
tested using the Device Programming Unit (DPU) or the
FPI-21 Programmer/Tester. The select system setting on
the DPU and FPI-32 must be set to MXL.
OPERATION The MLC initializes, operates, and maintains all devices
residing on the loop. The MLC communicates all relevant
device and event information, such as alarms and troubles,
to the PMI/PMI-2/PMI-3 (XLS), FCM2041-U2 (Desigo Fire
Safety Modular), FCM2041-U3 (Cerberus PRO Modular).
The sensitivity of any intelligent smoke detector and the
logic functions of any intelligent output devices can be
checked and adjusted from the PMI/PMI-2/PMI-3 (XLS),
FCM2041-U2 (Desigo Fire Safety Modular), FCM2041-U3
(Cerberus PRO Modular) through the MLC. All information
about the devices on the loop can be displayed on the PMI/
PMI-2/PMI-3 (XLS), FCM2041-U2 (Desigo Fire Safety
Modular), FCM2041-U3 (Cerberus PRO Modular). To see
the available information for each device on the loop, refer
to the FireFinder-XLS IOM Manual, P/N 315-033744, the
Desigo Fire Safety Modular IOM, Document ID A6V11231620,
or the Cerberus PRO Modular IOM, Document ID A6V11231627.
The MLC supports two separate circuits of MXL intelligent field devices. Each circuit
can monitor and control up to 60 intelligent devices as well as device accessories
(relay bases, audible bases, and remote lamps) in any combination. Each circuit has a
separate address on the HNET network. The installer sets the address on the module
for the first circuit which can be either odd or even. A consecutive address is auto-
matically assigned to the second circuit internally.
MLC
ALARM
TROUBLE
GND FAULT
TROUBLE
EXP CIRCUITS
CARD FAIL
HNET FAIL
RESET
POWER
HNET
HUNDREDS
TENS
ONES
TROUBLE
GND FAULT
MAIN CIRCUITS
USB
Figure 1
MLC Line Card

Siemens MLC Specifications

General

Category	Control Unit
Manufacturer	Siemens
Type	MLC
Input Voltage	24 V DC
Output Voltage	24 V DC
Protection Class	IP20

Summary

MLC MXL Line Card Introduction

MLC Functionality and System Capacity

Describes MLC's role, network addressing, and system device capacity.

MLC Key Features and Device Addressing

Details diagnostic LEDs, ground fault detection, USB port, and device addressing.

MLC Operation and Device Communication

Explains MLC initialization, operation, and communication with system components.

MLC Dual Circuit Support

Details MLC's support for two circuits, each monitoring up to 60 intelligent devices.

MLC Controls and Indicators Overview

MLC Reset and Re-initialization

Explains the reset switch function and need for re-initialization after power loss.

MLC Diagnostic LED Functions

Details the function of each of the nine diagnostic LEDs on the MLC.

MLC Pre-Installation Configuration Steps

Setting the HNET Network Address

Describes setting the two HNET network addresses using rotary dial switches.

MLC Installation Procedure

Power Down and MLC Card Insertion

Details removing power, inserting the card, and seating connectors in the CC-5/CC-2 slot.

MLC Firmware Upgrade Procedures

MLC Firmware Update Process

Outlines upgrading MLC firmware using USB and Zeus software.

MLC Firmware Upgrade Details

Initiating and Verifying Firmware Transfer

Describes initiating transfer, resetting module, and verifying completion.

Checking MLC Software Version

Explains how to find the current MLC software version via the system interface.

MLC Wiring and Connection Guide

Connecting External Wiring to MLC

Details the process of connecting external wiring to the terminal blocks.

MLC Wiring Diagrams and Power

MLC Device Loop Wiring Diagram

Illustrates Class A and Class B wiring configurations for MLC device loops.

MLC Power Connections

Specifies connecting +24V and -24V from PSC-12/PSX-12 to the MLC slot.

MLC Wiring Notes and Guidelines

Provides notes on wiring, loop configuration, ground faults, and unused loops.

MLC Device Compatibility Information

Compatible Intelligent Devices List

Lists compatible devices, bases, installation instructions, and maximum quantity.

MLC Circuit Specifications and Limitations

Details circuit power limits, wire types, resistance, capacitance, and device restrictions.

MLC Legacy Retrofit Compatibility

Compatible Legacy Retrofit Devices

Lists compatible legacy retrofit devices, their bases, and installation instructions.

CZM-1-1 B6 Alarm Verification Compatibility

Details CZM-1/-1B6 compatibility with alarm verification and detector categories.

MLC Electrical Ratings and Power

MLC Power Consumption Details

Provides specific current draw values for the MLC under different operating conditions.

Embedded Software and Security Disclaimers

Software Licenses and Copyrights

Lists software licenses and copyright notices for embedded software.

Cyber Security Disclaimer

Provides a disclaimer on cyber security and recommends comprehensive security concepts.