The output interface enables system integrators to control external devices. It includes:

• Sixteen Form-C relay outputs for load switching.

• Two digital inputs for cabinet tamper and power fault status monitoring.

Output Interface Components

Supplying Power to the Output Interface

The output interface requires 12 to 24 V DC for power on TB11 (VIN and GND).

• Locate power source as close to the output interface as possible.

• Use a minimum of 18 AWG wires.

• The VOUT terminal on TB11 provides the same voltage as VIN.

Communication Wiring

The output interface communicates with a controller via a 2-wire RS-485 interface. The interface allows multi-drop communication on a single bus of up to 4,000 feet (1,200 m).

Use twisted pair (minimum 24 AWG) with shield for the communication line. See 3.1 MR16OUT-S4 output module specifications.

Inputs for Cabinet Tamper/Power Fault

Input TMP and input FLT are used for monitoring cabinet tamper and power failure with normally closed contacts. These two inputs are for contact closure monitoring only, and do not use EOL resistors.

Control Output Wiring

The output interface provides sixteen Form-C relay contacts for controlling door strikes or other connected devices. When switching loads, especially inductive loads such as strikes, abnormal contact wear and premature contact failure can occur. Inductive loads can also generate electromagnetic interference (EMI), which may affect the operation of nearby equipment.

To improve reliability and extend relay life, always install a contact protection circuit. The following two circuits are recommended. The circuit should be placed as close to the load as possible (within 12 inches [30 cm]). Installing it farther from the load reduces its effectiveness. Use wire gauges that are appropriately sized for the load current to prevent voltage drop.

Diode selection

• Diode current rating > 1x strike current

• Diode break down voltage: > 4x strike voltage

• For 12 V DC or 24 V DC strike, diode 1N4002 (100V/1A) typical

DIP Switch and Jumper Usage

Switches 1 to 5 select the device address. Switches 6 and 7 select the communication baud rate. All other configuration settings are set via host software.

* DIP switch 8 (S8) is reserved and not used.

Jumpers

Jumper J1 - RS-485 termination, install in first and last units only.

Factory Reset

While not normally required, it is possible to perform a factory reset of the input door interface, which deletes all onboard stored data. To perform the delete:

1. Set all DIP switches to OFF.

2. Remove power from the output interface.

3. Restore power to the output interface.

4. Within 3 seconds, toggle DIP switch 8 ON.

Status LEDs

Power-up

All LEDs are OFF.

Initialization

Once power is applied, initialization of the module begins.

When initialization is completed, LEDs A, B, TMP, and FLT are briefly sequenced ON then OFF.

Run Time

After a successful initialization, the LEDs have the following meanings:

Specifications

Revision D assembly: The MR16OUT-S4 is for use in low voltage, class 2 circuits only.

• Primary power: 

  • 12 to 24 V DC ± 10%, 1100 mA maximum

  • When fully loaded, primary power is 12 to 24 V DC (+10%/ -7%), 1100 mA maximum

• Outputs: Sixteen Form-C relays: 

  • Normally open contact (NO) contact: 5 A @ 30 V DC resistive

  • Normally closed contact (NC) contact: 3 A @ 30 V DC resistive

• Inputs:

  • Two unsupervised, dedicated for cabinet tamper and UPS fault monitoring

• Communication:

  • RS-485, 2-wire. 38400 or 115200 bps

• Cable requirements (all ports shall use shielded conductors):

  • Power: One twisted pair, 18 AWG

  • RS-485 I/O devices: One twisted pair with drain wire and shield, 24 AWG, 120Ω impedance, 4,000 feet (1,200 m) maximum

  • Alarm inputs: One twisted pair per input, 30Ω maximum

  • Outputs: As required for the load

• Mechanical:

  • Dimension: 6 inches (152 mm) W x 8 inches (203 mm) L x 1 inch (25.4 mm) H

  • Weight: 11.6 oz. (330 g) nominal

• Environmental:

  • Temperature:

    • Storage: -55 to +85°C

    • Operating: 0 to +70°C

  • Humidity: 5 to 95% RHNC

Performance Levels

UL 294, 8th edition Performance Levels

These specifications are subject to change without notice.

Liability

The Interface should only be used to control exits from areas where an alternative method for exit is available. Thisproduct is not intended for, nor is rated for operation in life-critical control applications. LenelS2 is not liable under any circumstances for loss or damage caused by or partially caused by the misapplication or malfunction of the product. LenelS2’s liability does not extend beyond the purchase price of the product.

Regulatory

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

The output interface board must be powered by an NRTL (Nationally Recognized Testing Laboratory) approved by Class 2 Listed Power Supply. Expansion port and supervised input functionality were not evaluated by UL.

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