Eastron — equipment and components

Time relays and time switches Eastron

Select Eastron ESRD and ESRS devices for control-panel replacement. Send the model identification, supply voltage, contact arrangement and the required operating sequence.

Time relays and time switches

A weekly schedule differs from a delay triggered by a control signal. First define the operating principle, then specify contacts, supply and timing ranges. Supplement a front-panel photograph with the terminal diagram on the housing.

ESRD-TPD1

A single-channel digital weekly time switch with LCD, 40 programs, pulse program and holiday mode. Describe the switching schedule and connected load for selection.

ESRD-TPD2

A two-channel weekly time switch with LCD, 100 programs, pulse program and holiday mode. Identify the loads assigned to each channel and whether the schedules need to differ.

ESRD-TMS1

A digital multifunction time relay with 1C/O + 1NO contacts, LCD and 24 operating modes. Its listed range extends from 0 s to 99 h 59 min 59 s. Include a timing diagram for the intended cycle.

ESRD-TMS2

A time relay with two independent NO contacts, LCD and 24 operating modes. Listed ranges are 0–9999 s and 0–9999 min. Define the intended logic of each output before ordering.

ESRS-TM11 / TM12 / TM14 / TM23

Multifunction relays with one changeover contact, LED indication, 10 operating modes and 10 time ranges. Preserve the complete suffix when specifying a replacement; verify function and supply against that exact variant.

ESRD-TPM1 / ESRD-ST1

Additional products in the Relays & Switches group. For exact selection, provide the datasheet or a photograph of the side label, wiring diagram and the device function in the control panel.

Choose the equipment group

For consumption metering, start with SDM or DCM and define AC or DC operation and the connection method. Consider Smart X when the project requires network parameters and harmonic readings. If the instrument stays in place but an external sensor needs replacing, use the current-transformer group.

An ESP gateway transports data already measured by another device. The monitoring group covers projects with multiple measurement points. Time-delay and weekly-schedule tasks belong to ESRD and ESRS. This separates the required device from its function in the wider installation.

Specify an installed-device replacement

Photograph the front and side identification, terminal markings and the installation space. Transcribe the full model suffix. If the circuit includes CTs or a shunt, identify those components separately; the meter name alone does not define the complete measurement set.

State whether you need one instrument, a set with sensors or equipment for several identical panels. Describe an observed failure such as a blank display, missing communication or inconsistent readings. This helps distinguish a replacement purchase from a measurement-chain investigation.

Current input, protocol and scope of supply

Separate the primary current from the signal reaching the instrument. Inputs rated at 1 A / 5 A, 40 mA, 100 mA, 100 mV and Rogowski-coil inputs require the corresponding sensors. The power-circuit current rating alone does not specify the instrument variant.

For RS485, provide the protocol, addresses, speed and communication format. For Ethernet, define the device role and receiving system. List the meters, sensors, connecting cables, converters and mounting items actually required as separate entries in the scope of supply.

Inverter and charging-station projects

For an inverter, identify the exact model, software version and meter location in the power diagram. Include the supported-device list from the inverter documentation where available. Compatibility assessment concerns the specific device pair, including registers and energy-flow direction.

For a charging station, state AC or DC operation, the working range and power connection. Add any need for a separate display or multiple communication ports. Compare market-specific variants using the complete ordering code and project documentation.

Prepare a sourcing request

Send the ordering code or photographs, required quantity and delivery destination. If identification is incomplete, include the relevant wiring-diagram section and explain the device function. For a new installation, provide a specification with a separate line for each instrument type.

The quotation should be compared with the requested variant and set contents. State whether an alternative may be proposed for engineering review. For multiple panels, distinguish the quantity per panel from the total procurement quantity.

Quotation and project confirmation

Availability, price, lead time, compatibility and included components are confirmed for the selected variant after reviewing the request. No authorized-dealer status is claimed. MID, UL/ETL or PTB/Eichrecht identification must be checked against the exact instrument and project requirements.