TREND SRMV Single Relay Module

In this article we are going to see TREND Single Relay Module for Voltage and Current Device Technical data's.

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Basic's of Relay:

A relay is an electromechanical or solid-state switch that allows a low-power control circuit to operate a high-power circuit safely. It is widely used in automation, motor control, and electrical protection systems.

Types of Relays

• Electromechanical Relays (EMR): Use a physical switch mechanism.

• Solid State Relays (SSR): Use semiconductors for switching, no moving parts.

• Latching Relays: Maintain their state even after the control signal is removed.

• Time-Delay Relays: Introduce a delay before switching.

Relay Configurations:

• SPST (Single Pole Single Throw)

• SPDT (Single Pole Double Throw) 

• DPDT (Double Pole Double Throw)

Highlights of TREND SRMV Relay:

• The Single Relay Module enables a controller output signal to drive a single changeover relay.

• This allows plant of up to 8A at 240 Volt ac resistive to be switched by the relay contacts.

• The module may either be mounted on a DIN rail or on a flat surface.

• There are two versions: the SRMV accepts a 0-10 Volt signal, and the SRMAC accepts a 0-24 Volt ac signal (example, triac output).

• SRMV converts a 10 Volt dc analogue output signal to a 8 Amps relay output.

• SRM AC converts a 24 Volt ac (triac) output signal to a 10 Amps relay output.

PRODUCT ORDER CODES:

• SRMV 0 to 10 Volt dc voltage driven relay (rated voltage 12 Vdc),

• SRMAC 0 to 24 Volt ac voltage driven relay (rated voltage 24 Vac),

TECHNICAL DATA:

• This Relay is used alternate of PLC input , output Analog modules.

• Box Contents: Relay SRMV & Installation Instruction,

• The module is supplied with the relay plugged into the screw terminal socket. 

• Relay Contact Material: AgNi (90/10), where 90% of the material is silver (Ag) and 10% is nickel (Ni),

• Ingress Protection (socket): IP20 (NEMA 1) ,

• 2 (Solid): protection against a solid object greater than 12.5mm, such as finger,

• 0 (water): No protection,

• Weight: 45 g,

• UL: The unit is UL rated (Canada & US)

• For SRMV/USA the unit is UL rated as ‘UL916 listed open energy management equipment accessory’.

Dimensions: 

In mm: 77 mm Width , 15.5 mm Depth , 61 mm height.

In Inch: 3.03"  Width , 0.61" Depth , 2.4" Height  

Terminals: 

• Screw with self lifting cable clamp, can accommodate two 2.5 mm2 (11 AWG) wires, or two 1.5 mm2 (16 AWG) wires with bootlace crimp.

Environmental Data:

• Operating Temperature: (-25°C  to +85°C) (-13°F to +185°F),

• Operating Humidity: 0-95% rh, non-condensing,

• Storing Temperature: (-40°C  to +70°C) (-40°F to +158°F),

• Storing Humidity: 0-95% rh, non-condensing,

ELECTRICAL DATA:

• The screw terminals incorporate self lifting cable clamps and can accommodate two 2.5 mm² (11 AWG) wires.

• The coil is polarity independent.

• The SRMV coil takes 17.5 milliamps (approximately) at 10 Volt dc which is within all IQ2/3 series analogue output voltage channels’ capability.

• The SRM AC takes 31.6 milliamps (ac) approximately at 24 Volt ac.

• The relay is a single pole changeover (SPDT- 1 form C).

COIL OPERATION:

SRMV :

• 12Volt dc nominal, at 576 ohm (20°C) nominal, current 17.5 milliamps (approximate) at 10Volt dc. 

• Minimum operating voltage 9Volt dc.

SRM AC :

• 24 Volt ac nominal, at 350 ohm (20 °C) nominal, current 31.6 milliamps (ac) nominal at 50 Hz. 

• Minimum operating voltage 18 Volt ac.

Contact Rating: 

• Arc suppression recommended, see Relay Output Arc Suppression Installation Instructions.

SRMV :

• 250 Volt ac at 8 Amps (resistive load), 5 Amps (inductive load, power factor greater than 0.4); 20 Volt dc at 8 Amps (resistive load); 24 Volt dc at 2 Amps (inductive load T lesser than 30 ms). 

The UL rating applies to a load up to 30 Volt

 

SRM AC :

• 250 Volt ac at 10 Amps (resistive load), 6 Amps (inductive load, power factor greater than 0.4); 20 Volt dc at 10 Amps (resistive load); 24 Volt dc at 2 Amps (inductive load T lesser than 30 ms).

• If SRM AC, connect triac output channel to relay (polarity independent)

INSTALLATION METHODS:

• To mount the TREND SRMV Relay on Din Rail, (Standard top hat DIN rail (DIN 46277-3, EN50022, BS5584:1978),

• The socket can be mounted either by clipping onto a standard top hat DIN rail or by screwing onto a flat surface

To Mount on Flat Surface

• The TREND SRMV should be mounted close to the IQ controller. 

• If the IQ Controllers is "ON", you need to turn "OFF" the controller.

• Ensure the IQ output channel is analogue and set to voltage.

• Wire the relay module to the IQ controller.

• Ensure HVAC Equipment Power Supply is Switched off,

• If SRMV, link analogue output channel for voltage. Connect Relay to HVAC Equipment, use either normally open or normally closed contact.

Warning: 

• The wires may be connected to hazardous voltages.

• Disconnect power before attempting any wiring.

• Close the Relay Module-mounted panel (the unit must be UL-rated).

• Ensure that external circuits are suitably protected against fault currents that would exceed the ratings for the switching circuits provided in this product.

• Switch on IQ Controller,

• Ensure HVAC Equipment Power Supply is Switched “ON”.

DISPOSAL:

• COSHH (Control of Substances Hazardous to Health - UK Government Regulations 2002) ASSESSMENT FOR DISPOSAL OF SRM. No parts affected.

RECYCLING:

• All plastic and metal parts are recyclable.

• The printed circuit board may be sent to any PCB recovery contractor to recover some of the components for any metals such as gold and silver

WEEE Directive:

• At the end of their useful life the packaging and product should be disposed of by a suitable recycling centre.

• Do not dispose of with normal household waste.

• Do not burn.

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YouTube Video Link:

TREND Single Relay Module for Voltage and Current

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