Manufacturer · Italy

SENECA (Italy) automation products for Southeast Asia – quoted by engineers, shipped from Vietnam

Signal isolators, remote I/O, Modbus gateways, 4G data loggers and energy meters from SENECA S.r.l., Padova. HOANTRANTDH supplies them to Thailand, the Philippines, Indonesia, Malaysia, Singapore, Cambodia and Laos, with export documents and an engineer who checks your part numbers before quoting.

Email your part numbers or your problem to sales@hoantrantdh.com – you get a quote and a recommendation within 1 business day.

Email a quote request Use the quick form

Genuine SENECA with manufacturer documentation; CoC on request
Fast-moving items from stock in Hai Phong; others from Italy with stated lead time
EXW, FOB, CIF or DAP – export paperwork prepared by us
Free wiring check and configuration advice from our engineers

Quick quote request

Not sure which SENECA model you need? Send us the problem.

Most quote requests we receive start with a symptom, not a part number. Describe your signal, your PLC and what is going wrong, and we reply with the exact model, a wiring sketch and a price.

1. SENECA K109S isolator

"My 4–20 mA reading jumps or drifts."

Ground loops and VFD noise are the usual cause. The K109S is a 6.2 mm DIN-rail isolator with 1.5 kVac three-way isolation, 0.1 % accuracy and 14-bit resolution. It accepts 0/4–20 mA (loop-powered) or 0–10 V and outputs mA or V, with square-root extraction and horizontal-tank linearisation built in. Ten units take 62 mm of rail.

Email us the signal source, the PLC input type and the cable length – we confirm whether K109S or a loop-powered K121 fits.

2. SENECA Z109REG2-1 universal converter

"I need thermocouple, Pt100 and mA inputs but want one spare part."

One converter covers thermocouples J, K, R, S, T, B, E, N; Pt100/500/1000 and Ni100; mA; 75 mV–20 V; potentiometers. Isolated analog output, one SPST alarm relay, 10–40 Vdc or 19–28 Vac supply, 0.1 % accuracy, configured by microUSB with the free EASY Setup software or Android app. Panel builders keep it as the single spare for mixed sensor loops.

Email your sensor list – we tell you how many Z109REG2-1 replace your current mix of converters.

3. SENECA Z-PC remote I/O

"The PLC is out of I/O and the expansion module costs more than the PLC."

Z-PC modules are 17.5 mm wide, Modbus RTU over RS-485 up to 115 kbps, hot-swappable on the IDC10 bus: Z-4AI / Z-8AI (analog in), Z-3AO (analog out), Z-10-D-IN / Z-10-D-OUT (digital), Z-4RTD2 (4 × RTD), Z-8TC (8 × thermocouple). Need Modbus TCP, PROFINET or EtherNet/IP instead? The R-series and the new EtherNet/IP range cover it. Any PLC or SCADA that speaks Modbus reads them.

Email your I/O count and PLC brand – we send a module list, register map and wiring sketch.

4. SENECA Z-LTE 4G data logger

"We have pump stations, tanks or solar sites with no one on site."

Z-LTE is a 4G LTE data logger with Ethernet, two serial ports, 4 DI, 2 DO, 2 AI, GPS and a built-in battery backup. It polls Modbus RTU/TCP devices, logs to micro SD, sends alarms by SMS and e-mail, and pushes data by FTP, HTTP or MQTT to your SCADA or cloud. For a serial-to-Ethernet bridge without a modem, the Z-KEY gateway converts Modbus RTU ↔ TCP with up to 8 TCP clients and 10 servers.

Email the site list, what you want to measure and the mobile network available – we quote the logger, antenna and the SCADA screen to go with it.

SENECA products we quote most often

Family	Popular part numbers	What it does	Tell us
Signal isolators and converters (K-line, 6.2 mm)	K109S, K109UI, K109PT, K109TC, K109LV, K121	Isolate and convert 4–20 mA, 0–10 V, Pt100, thermocouple, shunt mV; K121 is 2-wire loop-powered, ATEX Zone 2	Quantity, input/output ranges, supply voltage
Universal converters (Z-line)	Z109REG2-1, Z170REG-1, Z-SG3	One model for TC/RTD/mA/V with alarm relay; Z170REG-1 splits one signal into two isolated outputs; Z-SG3 reads up to 4 load cells to 4–20 mA and Modbus RTU	Sensor types, number of loops, relay needed or not
Head-mount temperature transmitters	T121, T120	Pt100 or thermocouple to 4–20 mA, 2-wire isolated, fits DIN B sensor heads	Sensor type, range, quantity
Remote I/O, Modbus RTU (Z-PC, 17.5 mm)	Z-4AI, Z-8AI, Z-3AO, Z-10-D-IN, Z-10-D-OUT, Z-4RTD2, Z-8TC-1	Expand any PLC or SCADA over RS-485; hot-swap on IDC10 bus	I/O count by type, PLC brand, bus length
Remote I/O, Ethernet (R-series)	R-16DI-8DO, R-series Modbus TCP, PROFINET "-P", EtherNet/IP range	Ethernet I/O with pass-through to RS-485 devices	Protocol, I/O count, one or two Ethernet ports
Gateways and serial device servers	Z-KEY, Z-KEY-WIFI, R-KEY-LT	Modbus RTU ↔ TCP, virtual COM, up to 8 TCP clients; UL certified	Number of serial devices, TCP clients, Wi-Fi or wired
Data loggers and remote alarms	Z-LTE (4G), Z-GPRS3, Z-LOGGER3, MyALARM3 Cloud	Poll Modbus devices, log to micro SD, alarm by SMS/e-mail, push by FTP/HTTP/MQTT	Site count, signals per site, mobile network, SCADA or cloud target
Energy meters and power analysers	S504C-6 (MID option), S534, S604E, S604E-ROG, R204 + RC160 Rogowski	Three-phase kWh with RS-485 Modbus; Rogowski coils fit without opening the busbar; R204 adds MQTT and UL	Current range, CT or Rogowski, MID required or not, protocol
Current transducers	T201DCH-LP	DC and AC TRMS to ±300 A by Hall effect, 4–20 mA out – batteries, solar, UPS	Current range, DC or AC, quantity

Not in the table? Email the part number anyway – we quote the full SENECA catalogue of 600+ codes.

Email a quote request

Shipping and payment for Southeast Asia

Ship from: Hai Phong, Vietnam – air freight or courier to Bangkok, Manila, Jakarta, Kuala Lumpur, Singapore, Phnom Penh, Vientiane
Incoterms: EXW, FOB, CIF or DAP, your choice. We prepare commercial invoice, packing list and certificate of origin for your customs broker.
Lead time: Fast-moving items: 2–5 working days from stock in Hai Phong. Other items: from SENECA Italy, lead time stated on the quote.
Payment: Bank transfer (T/T) in USD; 50 % with order, 50 % before shipment for first orders.
Documents: Manufacturer datasheet and declaration of conformity with every shipment; Certificate of Conformance and CO/CQ on request.
Warranty: SENECA manufacturer warranty, handled by HOANTRANTDH – you deal with one contact, not a chain of resellers.

Why integrators in Southeast Asia buy SENECA from HOANTRANTDH

An engineer answers, not a sales desk

We build SCADA, PLC and instrumentation systems in Vietnam with these same modules. If a different model or a successor part is the better buy, we say so before you order.

One quotation for a mixed BOM

SENECA modules together with Siemens, Mitsubishi, Moxa, Phoenix Contact or sensors from our other brands – one invoice, one shipment.

Free engineering tools

Our browser-based Modbus RTU tool, 4–20 mA calculator and sensor selector are free to use; we share wiring templates and register maps with every SENECA order.

Software if you need it

For remote sites we can deliver the SENECA hardware with a ready SCADA screen or data hub, so your customer sees data on day one.

Proof, not promises

400+ projects and 5,000+ customers across Vietnam and the region, from food plants to power stations.

One business day

Every request gets an acknowledgement within hours and a quote with datasheet within one business day, Vietnam time.

Send your part numbers or your BOM to sales@hoantrantdh.com. Reply within 1 business day.

Copy this into your e-mail

Fastest way to a quote: copy the template, fill the brackets, send.

To: sales@hoantrantdh.com Subject: RFQ SENECA – [Your company] – [Country] Hello HOANTRANTDH, Please quote the following SENECA items: 1. [Part number] – [quantity] 2. [Part number] – [quantity] Or, our application: [signal type / channels / PLC / protocol / site location] Delivery to: [city, country] Incoterm: [EXW / FOB / CIF / DAP] Needed by: [date] [Name] – [Company] – [phone or WhatsApp]

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Technical guides for SENECA products

Written by our engineers from projects in Vietnam. Each guide ends with what to send us for a quote.

4–20 mA signal isolation: stopping ground loops and VFD noiseInstrumentation · 9 min read
SENECA Z-PC remote I/O over Modbus RTU: wiring, addressing and PLC integrationAutomation · 10 min read
SENECA Z-KEY Modbus gateway: RTU to TCP modes, limits and setupNetworking · 8 min read
Remote monitoring of pump stations and tanks with the SENECA Z-LTE 4G data loggerIIoT · 10 min read
Energy sub-metering with SENECA meters: CT or Rogowski, MID, and Modbus integrationEnergy · 9 min read
Choosing a SENECA temperature converter: T121 head-mount, K121, K109PT or Z109REG2-1Instrumentation · 8 min read

Frequently asked questions

Do you ship SENECA products to Thailand, the Philippines, Indonesia or Malaysia?

Yes. We ship from Hai Phong by courier or air freight to all ASEAN countries, with export documents for your customs broker. Tell us the delivery city and we quote DAP if you prefer a landed price.

Are the products genuine SENECA?

Yes. Every unit comes with the manufacturer's documentation and declaration of conformity; we provide a Certificate of Conformance and country-of-origin paperwork on request. We do not sell refurbished or grey-market stock.

Is HOANTRANTDH an authorised SENECA distributor?

We are an independent engineering and supply company. SENECA products we deliver come from SENECA's distribution network with full manufacturer documentation, and we are working with SENECA S.r.l. on coverage for Thailand, the Philippines, Cambodia and Laos.

What should I include in a quote request?

Part numbers and quantities, or: the signal type (4–20 mA, 0–10 V, Pt100, thermocouple, pulse), number of channels, supply voltage (24 Vdc or 85–265 Vac), the protocol you need (Modbus RTU, Modbus TCP, MQTT, PROFINET) and your PLC or SCADA. For remote sites add the location and the link available (Ethernet or 4G). Our engineer proposes the module set and avoids over-specifying channels.

Can you pre-configure the modules before shipping?

Yes. We can set Modbus addresses, baud rates, input ranges and alarm thresholds, and supply a register map, so your technician only has to wire and power them.

What is the minimum order?

No minimum. Sample orders of one or two units are welcome; courier shipping is quoted at cost.

Do you also supply SCADA or software with SENECA hardware?

Yes. HOANTRANTDH develops SCADA, data-hub and digital-twin software and can deliver the SENECA data logger or remote I/O together with a working screen for your customer.

How fast do you reply?

Within one business day (Vietnam time, UTC+7). Urgent line-down requests: write URGENT in the subject line.