Manufacturer datasheet photo · industrial 8-port desktop serial device server
ZJTS808
Industrial Serial Device Server · 8×RS-232/485 · 2×LAN
Industrial 8-Port Desktop Serial Device Server · 8 × RS-232/485 · 2 × 10/100Base-T(X) LAN · DC5V/AC220V
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◆8×RS-232/485 Serial
◆Dual 10/100 LAN
◆15KV ESD Protection
◆Modbus TCP/IP
◆-40~75°C Wide Temp
◆5-Year Warranty
Overview
The ZJTS808 is an industrial 8-port desktop serial device server that connects up to 8 RS-232/485 serial devices to an Ethernet network through 2 fixed 10/100Base-T(X) LAN ports. It runs a 32-bit 100MHz processor with 2MB memory, supports DHCP, Telnet, TCP, UDP, IP, ICMP, ARP and Modbus TCP/IP, offers WEB-browser remote configuration with a bilingual Chinese/English setup menu, and carries built-in 15KV ESD surge protection on every serial port. Powered by DC5V (5–24VDC via an optional 220V-to-5V adapter) or AC220V (85–264VAC/77–300VDC) with reverse-polarity and overload protection, it operates from -10 to +60°C (wide-temp version -40 to +75°C) in a compact 30×106×190mm IP40 metal enclosure for desktop or wall-mount installation.
Is This the Right Fit?
Six real deployment scenarios matched to this model's actual datasheet specifications.
Legacy Serial Device IP NetworkingUp to 8 RS-232/485 serial ports are freely combinable (S-232 all-RS232, S-485 all-RS485, or M 2-in-1 per port), turning eight legacy serial instruments into IP-reachable devices through the 2 × 10/100Base-T(X) Ethernet ports.
PLC & Automation Cell IntegrationModbus TCP/IP is supported alongside DHCP/Telnet/TCP/UDP/IP/ICMP/ARP, letting the 8 serial ports bridge multiple PLCs or automation controllers onto the plant Ethernet without rewiring existing RS-232/485 cabling.
Extended-Temperature Cabinet DeploymentAn optional wide-temperature variant extends the operating range from the standard -10~60°C to -40~75°C, for unheated cabinets exposed to cold winters or hot summers.
Standard Dual-LAN Port — No Selection NeededEvery ZJTS808 unit ships with 2 × 10/100Base-T(X) Ethernet ports built in as standard — unlike models where port count is an option, there is no single-LAN version to choose from.
Desktop High-Density Multi-Device Access8 RS-232/485 ports in a compact 30×106×190mm desktop metal enclosure let one unit aggregate more serial devices than the smaller desktop models in this series, without needing rack or DIN-rail installation.
Built-In 15KV ESD Surge Protection on Every PortAll 8 serial ports carry built-in 15KV ESD surge protection plus overall reverse-polarity and overload power protection, adding resilience against electrical transients along long industrial wiring runs.
Not a good fit if:
- Single power input only (DC5V or AC220V) — not a dual-redundant power design; add external backup power if input redundancy is required.
- IP40 metal enclosure only — not rated for direct outdoor rain/dust exposure without an additional cabinet.
- A serial-to-Ethernet device server, not a network switch — the 2 LAN ports connect the unit itself to the network and do not provide VLAN/RSTP or multi-device switching.
Key Features
- 2 × 10/100Base-T(X) adaptive Ethernet ports standard — fast networking for serial devices
- Up to 8 × RS-232/485 serial ports, flexibly combinable (RS-232-only, RS-485-only, or 2-in-1 combo)
- Built-in 15KV ESD surge protection on all serial ports
- WEB-browser remote configuration · bilingual Chinese/English setup menu
- DC5V (5–24VDC, optional 220V-to-5V adapter) or AC220V (85–264VAC/77–300VDC) power, reverse-polarity & overload protection
- Wide-temp -40~75°C optional · compact 30×106×190mm IP40 metal enclosure · desktop/wall-mount · 5-year warranty
Specifications
Performance
| CPU | 32-bit, 100MHz |
| Memory | 2MB |
| Ethernet Rate | 10/100Mbps adaptive, manual setting supported |
| Communication Mode | 10M half/full duplex, 100M half/full duplex |
| Port Protection | 15KV electromagnetic isolation |
Serial & Network Ports
| RJ45 Ports | 2 × 10/100Base-T(X) |
| Serial Ports | 8 × RS-232/485 |
| Port Connector | RS-232/485 terminal block |
| Signal (RS-232) | TxD, RxD, GND |
| Signal (RS-485, 2-wire) | Data+, Data-, GND |
| Data Bits | 5, 6, 7, 8 |
| Parity | None, Even, Odd, Space, Mark |
| Stop Bits | 1, 2 |
| Flow Control | RTS/CTS, XON/XOFF |
| Baud Rate | 300 bps – 230.4 Kbps |
| Protocols | DHCP, Telnet, TCP, UDP, IP, ICMP, ARP, Modbus TCP/IP |
| Virtual COM Driver | Windows NT/2000/XP/Vista/7/10/11 |
Power
| 5V Input | Optional 220V-to-5V adapter; supports 5–24VDC |
| 220V Input | 3-pin terminal; supports 85–264VAC/77–300VDC |
| Power Consumption | Max 4 W |
| Power Protection | Reverse-polarity & overload |
Environment
| Standard Temp | -10 ~ +60°C |
| Wide Temp | -40 ~ +75°C |
| Storage Temp | -40 ~ +85°C |
| Humidity | 5–95% non-condensing |
Physical
| Housing | IP40 metal enclosure |
| Mounting | Desktop / wall-mount |
| Dimensions | 30 (H) × 106 (D) × 190 (W) mm |
Certification
| EMC | CE, FCC |
| EMI | FCC Part 15, EN 55032 (CISPR 32) Class A |
| EMS | EN61000-4-2 (ESD) Level 3, EN61000-4-3 (RS) Level 3, EN61000-4-4 (EFT) Level 3, EN61000-4-5 (Surge) Level 3, EN61000-4-6 (CS) Level 3, EN61000-4-8 |
| Shock | IEC60068-2-27 |
| Free Fall | IEC60068-2-32 |
| Vibration | IEC60068-2-6 |
| Green | RoHS, WEEE |
Reliability
| MTBF | 320,000 hours |
| Warranty | 5 years |
Models & Ordering
| Model | Product Description | Price |
|---|---|---|
| ZJTS808-S-232 | 8-port RS-232 serial device server, 2 × 10/100M adaptive Ethernet, desktop/wall-mount, AC220V power, optional 220V-to-5V (5–24V) adapter. | |
| ZJTS808-S-485 | 8-port RS-485 serial device server, 2 × 10/100M adaptive Ethernet, desktop/wall-mount, AC220V power, optional 220V-to-5V (5–24V) adapter. | |
| ZJTS808-M | 8-port RS-232/485 (2-in-1) serial device server, 2 × 10/100M adaptive Ethernet, desktop/wall-mount, AC220V power, optional 220V-to-5V (5–24V) adapter. |
This page covers the ZJTS808 series: -S-232 = 8 × RS-232 ports only; -S-485 = 8 × RS-485 ports only; -M = 8 × RS-232/485 combo (2-in-1, port type selectable). All variants share 2 × 10/100M adaptive Ethernet ports, desktop/wall-mount installation, and AC220V standard power with an optional 220V-to-5V (5–24VDC) power adapter. The requested model is ZJTS808.
Dimensions
unit: mm
Your Brand. Factory-Direct Supply.Neutral casing, ready for your logo · Custom port/power options · Small batches welcome.
Custom & OEM →Who uses it, where it goes and how to install it
Written for the ZJTS808 series from its own datasheet: 8 × RS-232/485 serial ports, 300 bps to 230.4Kbps, 2 × 10/100Base-T(X) Ethernet as standard, TCP/UDP and Modbus TCP/IP, virtual COM driver, 5–24VDC or 85–264VAC power, desktop/wall mount, 30 × 106 × 190 mm.
Who it is for
- Substations and large switchrooms — Eight RS-485 buses from protection relays, multifunction meters and transformer monitors can be brought to the station LAN from one unit with the -S-485 version, one bus per bay or panel row.
- Laboratories and test benches — Instruments with RS-232 ports (power analysers, balances, temperature controllers) appear as 8 COM ports on a Windows PC through the virtual COM driver, without USB-serial adapters.
- Factories consolidating a production area — One desktop or wall unit replaces several 2- or 4-port servers for a row of machines, and the 2 built-in LAN ports leave one free for a local maintenance laptop.
- Integrators who do not want a rack — At 30 × 106 × 190 mm it is the largest ZJTS model that still mounts on a wall or shelf; above 8 ports the family moves to the 1U rack ZJTS816 and ZJTS832.
Where and how to install
- Wall, shelf or panel back plate — Mounting is desktop or wall-mount (no DIN rail, no rack ears). The 190 mm width carries 8 serial terminals, so mount it where all 8 cables can enter from one side through a duct, with a label per port.
- Serial wiring — All 8 ports are terminal blocks: RS-232 TxD, RxD, GND, or RS-485 2-wire Data+, Data-, GND. Use shielded twisted pair for RS-485, keep Data+/Data- polarity the same on every device, and ground each shield at one end only.
- Bus length and termination — As general practice, keep RS-232 runs to about 15 m; RS-485 can run up to about 1200 m at low baud rates, less at 115.2K or 230.4K. Wire RS-485 as a daisy chain, not a star, and fit 120 Ω termination only at the two far ends of each bus.
- Network and power — Both 10/100Base-T(X) LAN ports are standard; connect one to the plant switch and keep the other for local access. Power is the 5V input (5–24VDC, optional 220V-to-5V adapter) or the 3-pin 220V terminal (85–264VAC / 77–300VDC), single input, with reverse-polarity and overload protection; use a UPS where the data is critical.
- Surge, ESD and environment — All 8 serial ports have 15KV ESD protection and the unit is tested to EN61000-4-5 surge Level 3; galvanic isolation is not listed, so add external RS-485 surge protectors on lines that leave the building. IP40 metal housing for indoor rooms or closed cabinets; standard -10 ~ +60°C, wide -40 ~ +75°C, 5–95% non-condensing.
Link planning: which ZJTS808 version
All three versions have 8 serial ports and 2 LAN ports in the same 30 × 106 × 190 mm housing; only the serial interface type changes.
| ZJTS808-S-232 | ZJTS808-S-485 | ZJTS808-M | |
|---|---|---|---|
| Serial ports | 8 × RS-232 | 8 × RS-485 (2-wire) | 8 × RS-232/485 (2-in-1) |
| Signals | TxD, RxD, GND | Data+, Data-, GND | TxD, RxD, GND / Data+, Data-, GND |
| Typical cable length (general practice) | ~15 m | up to ~1200 m at low baud | ~15 m / up to ~1200 m |
| Baud rate | 300 bps – 230.4Kbps | 300 bps – 230.4Kbps | 300 bps – 230.4Kbps |
| Ethernet ports | 2 × 10/100Base-T(X) | 2 × 10/100Base-T(X) | 2 × 10/100Base-T(X) |
| Peak serial data, all ports at 230.4K | ~1.8 Mbps | ~1.8 Mbps | ~1.8 Mbps |
| Virtual COM driver | Windows NT/2000/XP/Vista/7/10/11 | Windows NT/2000/XP/Vista/7/10/11 | Windows NT/2000/XP/Vista/7/10/11 |
| Power input / consumption | 5–24VDC or 85–264VAC; max 4 W | 5–24VDC or 85–264VAC; max 4 W | 5–24VDC or 85–264VAC; max 4 W |
| Operating temperature | -10 ~ +60°C (wide -40 ~ +75°C) | -10 ~ +60°C (wide -40 ~ +75°C) | -10 ~ +60°C (wide -40 ~ +75°C) |
| Mounting / size | Desktop/wall, 30×106×190 mm | Desktop/wall, 30×106×190 mm | Desktop/wall, 30×106×190 mm |
- Pick -S-485 for up to 8 meter, relay or sensor buses; one bus per port keeps each poll cycle short and confines a wiring fault to one bus.
- Pick -S-232 for a bench or control room with up to 8 instruments within about 15 m, and -M for a mixed installation.
Specifications from the ZJTS808 manufacturer datasheet. Peak serial data = 8 × 230.4 kbps; cable lengths are general RS-232/RS-485 practice, not datasheet values.
8-Port Serial Device Server FAQ — ZJTS808
How many serial devices can the ZJTS808 handle at once?
Up to 8 RS-232/485 serial devices connect through terminal-block ports, and the unit joins the network over 2 fixed 10/100Base-T(X) LAN ports. It runs a 32-bit 100MHz processor with 2MB memory, forwarding serial data at rates from 300 bps to 230.4 Kbps per port.
Is the configuration interface easy for local technicians?
Yes — remote configuration runs in a WEB browser with a bilingual Chinese/English setup menu, so no vendor tool is needed. Protocol support covers DHCP, Telnet, TCP, UDP, IP, ICMP, ARP and Modbus TCP/IP, and the virtual COM driver works on Windows NT through Windows 11.
What are the power options for the ZJTS808?
Two: DC5V through an optional 220V-to-5V adapter accepting 5–24VDC, or AC220V on a 3-pin terminal with an 85–264VAC / 77–300VDC range. Maximum consumption is 4 W. Reverse-polarity and overload protection are built in, so wiring mistakes in the cabinet do not damage the unit.
Can it work in hot or freezing environments?
The standard version operates -10 to +60°C and the wide-temperature version -40 to +75°C, with storage tolerance of -40 to +85°C and 5–95% non-condensing humidity. Every serial port carries 15KV electromagnetic isolation, and EMC immunity reaches EN61000-4 series Level 3.
How big is it and how long should it last?
The IP40 metal enclosure measures 30×106×190 mm and sits on a desktop or mounts on a wall — 8 serial ports without taking rack space. Rated MTBF is 320,000 hours (over 36 years continuous), certified CE/FCC and RoHS/WEEE, and covered by a 5-year warranty.
Can the ZJTS808 connect Modbus RTU meters to a SCADA that speaks Modbus TCP?
Modbus TCP/IP is in its protocol list, so this is the intended use: the SCADA polls the ZJTS808 over Ethernet and the unit forwards the requests to the RTU devices on its serial ports. The datasheet does not describe the gateway settings in detail (slave ID routing, response timeout), so send us your SCADA and meter models and we will confirm the setup before you order. If your software only speaks Modbus RTU on a COM port, use the virtual COM driver instead.
Which Windows versions does the ZJTS808 virtual COM driver support, and how many COM ports will I get?
The datasheet lists Windows NT/2000/XP/Vista/7/10/11. Each of the 8 serial ports is mapped to its own COM number on the PC, so software written for a local COM port keeps working without changes. Linux and macOS drivers are not listed; on those systems, or for new software, connect over TCP/UDP or Modbus TCP/IP instead of a virtual COM port. Ask us for the current driver and setup tool when you order.
How should I spread RS-485 meters over the 8 ports of the ZJTS808?
The datasheet gives no node limit per port. As general RS-485 practice, plan up to 32 standard unit loads per bus, up to about 1200 m at 9600 bps, daisy-chained with 120 Ω at both ends. Splitting devices over several ports polls them in parallel: 80 meters as 8 buses of 10 finish a read cycle roughly 8 times faster than one bus of 80, and a short circuit on one bus does not stop the other 7.
Is the 10/100M Ethernet of the ZJTS808 fast enough for all 8 serial ports at full speed?
Yes, by a wide margin. Even with all 8 ports streaming continuously at the maximum 230.4Kbps, the serial data adds up to about 1.8 Mbps (8 × 230.4 kbps), well below the 100 Mbps port; real Modbus polling uses far less. The limits you will meet first are the serial side (baud rate, number of devices per bus, device response time) and the response timeout set in your SCADA, not the network port. Set the Ethernet port to auto-negotiate, or fix speed and duplex to match the switch port.
Do the two LAN ports on the ZJTS808 provide network redundancy?
Not as a listed feature: the datasheet gives 2 × 10/100Base-T(X) but no ring, RSTP, failover or dual-IP function, and the unit is a serial gateway, not a switch. Use the second port as an extra connection point (for example a local engineering laptop). If the link must survive a cable or switch failure, connect the ZJTS808 to an industrial ring switch and back up its power with a UPS; tell us your topology and we will confirm before you order.
ZJTS808 or ZJTS816: which one for a growing site?
Both have 2 × 10/100Base-T(X), the same baud range, protocols and virtual COM driver. Pick the ZJTS808 for up to 8 devices on a wall or shelf, with 5–24VDC or 220V power. Pick the 1U rack ZJTS816 when you expect more than 8 ports in a 19-inch cabinet; it is AC220V powered and adds an RS-232 console port. Two ZJTS808 units are also an option if the devices are in two different places.
What power connector does the ZJTS808 have, and do I need to confirm it before ordering?
Yes, please confirm the power connector with us before ordering. For Zhongxin Shutong products the power input type and connector can differ between versions and batches, so tell us your supply (AC or DC and the voltage), how you will wire it in the cabinet and your country's plug standard, and we confirm the exact connector and supply version of the ZJTS808 for your order.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
Our own line — Zhongxin Shutong industrial switches1,500 m² clean rooms100% port-by-port tested-40…+75 °C rated, cycled to +85 °CEN 61000-4 Level 3 EMC immunitySerial-number traceability on every unitISO 9001 · 14001 · 27001 · CMMI L3See the factory →See all certifications →
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