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MAX1524 and MAX2324 Safety Mat
Monitoring Modules
Datasheet
MAX1524 (12-24 V dc / 115 V ac operation) and MAX2324 (12-24 V dc / 230 V ac operation)
WARNING: Not a Stand-Alone Safeguarding Device
This device is considered complementary equipment that is used to augment safeguarding that limits or
eliminates an individual's exposure to a hazard without action by the individual or others. Failure to
properly safeguard hazards according to a risk assessment, local regulations, and relevant
standards may lead to serious injury or death.
Models
Model
Supply Voltage
MAX1524
12 to 24 V dc or 115 V ac
MAX2324
12 to 24 V dc or 230 V ac
Important... Read This Before Proceeding
The user is responsible for satisfying all local, state, and national laws, rules, codes, and regulations relating to the use of
this product and its application. ATEK Access Technologies has made every effort to provide complete application,
installation, operation, and maintenance instructions. Please direct any questions regarding the use or installation of this
product to the Customer Care Team at 800-523-6996.
The user is responsible for making sure that all machine operators, maintenance personnel, electricians, and supervisors
are thoroughly familiar with and understand all instructions regarding the installation, maintenance, and use of this
product, and with the machinery it controls. The user and any personnel involved with the installation and use of this
product must be thoroughly familiar with all applicable standards, some of which are listed within the specifications. ATEK
Access Technologies makes no claim regarding a specific recommendation of any organization, the accuracy or
effectiveness of any information provided, or the appropriateness of the provided information for a specific application.
Original Document
122366 Rev. B
•
Monitors one 4-wire safety mat, or multiple mats in series
•
Selectable Automatic (Auto) Reset or Monitored Manual Reset
•
Input monitoring circuit incorporates redundant microprocessors
•
Plug-in terminal blocks
•
Four normally open output switching channels for connection to control-
reliable power interrupt circuits and one normally closed auxiliary output
channel for status monitoring
•
Two auxiliary solid-state outputs indicate state of internal relays K1 and
K2, and state of system (ON = normal operation)
•
6 amp safety output contacts; 5 amp aux. output contacts
•
DIN-rail-mountable 45 mm-wide housing
•
External device monitoring (one-channel EDM)
•
Design complies with UL 991, ISO 13856-1, ISO 13849-1 (EN 954-1)
Category 4: Internal Module, or Category 3 with 4-wire Safety Mat
connected
Outputs
4 Normally Open Safety
1 Normally Closed Aux.
2 Solid-State Aux.
10 December 2015
Output Rating
N.O. Safety Outputs: 6 A
N. C. Aux. Outputs: 5 A
SS Aux Outputs: 100 mA
122366
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Table of Contents
Related Manuals for Larco MAX1524
Summary of Contents for Larco MAX1524
- Page 1 MAX1524 and MAX2324 Safety Mat Monitoring Modules Datasheet MAX1524 (12-24 V dc / 115 V ac operation) and MAX2324 (12-24 V dc / 230 V ac operation) • Monitors one 4-wire safety mat, or multiple mats in series • Selectable Automatic (Auto) Reset or Monitored Manual Reset •...
- Page 2 MAX1524 and MAX2324 Safety Mat Monitoring Modules Overview Safety Mat Monitor Modules MAX1524 and MAX2324 (the "Safety Module") are used to verify the proper operation of 4- wire presence-sensing switching mats (sensors). Multiple mats may be switched in series to one Safety Module. The Safety Module provides the redundant safety outputs required for creating a control-reliable safety circuit.
- Page 3 MAX1524 and MAX2324 Safety Mat Monitoring Modules Safety Circuit Integrity and ISO 13849-1 Safety Circuit Principles Safety circuits involve the safety-related functions of a machine that minimize the level of risk of harm. These safety- related functions can prevent initiation, or they can stop or remove a hazard. The failure of a safety-related function or its associated safety circuit usually results in an increased risk of harm.
- Page 4 MAX1524 and MAX2324 Safety Mat Monitoring Modules The sensor must meet a minimum environmental rating of IP54. When the sensor is specified for immersion in water, the sensor’s minimum environmental rating must be IP67. Special attention may be required to the interconnect cabling;...
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Page 5: Mechanical Installation
MAX1524 and MAX2324 Safety Mat Monitoring Modules Separation Distance As a stand-alone safeguard, the sensor must be installed at a separation distance (safety distance) such that the exterior edge of the sensing surface is at or beyond the safety distance, unless solely used to prevent start/restart or solely used for clearance safeguarding (see ANSI B11.19). -
Page 6: Electrical Installation
ISO 12100). The Safety Module is powered by either a 12-24 V dc supply at 4 W or an ac supply (115 V ac, model MAX1524, or 230 V ac, model MAX2324) at 7 VA. The sensor circuit, which monitors the conductive elements (plates) of the safety mat, consists of two channels (A and B) that issue a stop command (that is, open the safety outputs) when an individual steps onto the safety mat, shorting the two channels together. - Page 7 MAX1524 and MAX2324 Safety Mat Monitoring Modules NOTE: The minimum amount of time for the Module to detect a STOP condition is 15 milliseconds. This "recovery time" (OFF state) is required for the internal integrity tests to complete, allowing a reliable reset to occur.
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Page 8: External Device Monitoring
MAX1524 and MAX2324 Safety Mat Monitoring Modules Connection of Reset Switch The reset circuit switch can be any mechanical switch, such as a normally open momentary switch, or a two-position key switch. The reset switch must be capable of reliably switching 12 to 30 V dc at 20 to 50 milliamps. As shown in the hookup drawings, the reset switch connects between Safety Module terminals S33 and S34. - Page 9 MAX1524 and MAX2324 Safety Mat Monitoring Modules dc common 12-24V dc 115V ac or 230V ac (depending on model) Series Connection of Multiple Safety Mats The number of mats is limited by the total series resistance per input channel. See section, “Safety Mat Device Checkout”...
- Page 10 MAX1524 and MAX2324 Safety Mat Monitoring Modules WARNING: Wiring of Arc Suppressors If arc suppressors are used, they MUST be installed as shown across the actuator coil of the stop control elements (MSCs or MPCEs). NEVER install suppressors directly across the output contacts of the Safety Device or Module.
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Page 11: Troubleshooting
MAX1524 and MAX2324 Safety Mat Monitoring Modules CAUTION: Disconnect Power Prior to Checkout Before performing the initial checkout procedure, make certain all power is disconnected from the machine to be controlled. Dangerous voltages may be present along the Safety Module wiring barriers whenever power to the machine control elements is On. -
Page 12: Specifications
Category Specification Supply Voltage and AI-A2: 115 V ac (model MAX1524) or 230 V ac (model MAX2324) ±15%, 50/60 Hz Current BI-B2: 11 V dc to 27.6 V dc Connect the Safety Module only to a SELV (safety extra-low voltage, for circuits without earth ground) or a PELV (protected extra-low voltage, for circuits with earth ground) power supply, according to EN IEC 60950, NEC Class 2. - Page 13 MAX1524 and MAX2324 Safety Mat Monitoring Modules Category Specification Power Consumption Approx. 4 W / 7 VA Supply Protection Circuitry Protected against transient voltages and reverse polarity Overvoltage Category Output relay contact voltage of 1 V to 150 V ac/dc: category III Output relay contact voltage of 151 V to 250 V ac/dc: category III, if appropriate overvoltage reduction is provided, as described earlier.
- Page 14 MAX1524 and MAX2324 Safety Mat Monitoring Modules Category Specification Input Requirements Safety mat normally open contact must be capable of switching 20 to 100 mA at 12 to 30 V dc; and must be closed > 25 ms for a valid stop command.
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Page 15: Certifications And Standards
Certifications and Standards EC Declaration of Conformity (DoC) ATEK Access Technologies herewith declares that the MAX1524 and MAX2324 Safety Mat Monitoring Modules are in conformity with the provisions of the Machinery Directive 2006/42/EC and all essential health and safety requirements have been met.
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