Manufacturer product photo · 1T (left) and 2T (right) DIN-rail serial device server variants
ZJTS804D
Serial Device Server · 4×RS-232/485 · DIN-Rail
Industrial DIN-Rail Serial Device Server · 4×RS-232/485 · 1 or 2×10/100M Ethernet · DC5V (5–24V)
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◆4×RS-232/485
◆1 or 2×Ethernet
◆DIN-Rail Mount
◆DC5V Wide Range
◆15KV ESD Protection
◆5-Year Warranty
Overview
The ZJTS804D is an industrial DIN-rail serial device server that bridges 4 × RS-232/485 serial devices onto an Ethernet network. It offers 1 or 2 × 10/100M auto-adaptive Ethernet ports, WEB-browser remote configuration, and built-in 15KV ESD surge protection on every serial port. Powered by DC5V (5–24V wide-range DC input) with reverse-polarity and overload protection, in a compact 135×117×50mm metal enclosure for DIN-rail or wall mounting, it is built for cabinets that need to connect legacy serial equipment to an Ethernet network.
Is This the Right Fit?
Six real deployment scenarios matched to this model's actual datasheet specifications.
Legacy Serial Equipment to Ethernet4 independent RS-232/485 serial ports let PLCs, meters, and other legacy serial-only equipment reach a standard 10/100M Ethernet network — no rewiring of the serial side required.
Electrical Cabinet DIN-Rail MountDefault DIN-rail mounting plus DC5V wide-range 5–24VDC input with reverse-polarity/overload protection fits directly inside control cabinets and junction boxes — the only DIN-rail form factor in this serial-server family.
PLC Automation Cell IntegrationBuilt-in Modbus TCP/IP support lets RS-232/485 PLCs and automation controllers bridge directly onto an Ethernet-based SCADA/HMI network alongside DHCP, Telnet, TCP/UDP and ARP.
Outdoor / Unheated Cabinet DeploymentAn optional wide-temperature version rated -40 to 75°C (vs. -10 to 60°C standard) keeps the serial link running in unheated outdoor cabinets and cold climates.
Choose 1 or 2 Ethernet UplinksSold as -1T (a single 10/100M Ethernet port) or -2T (two 10/100M Ethernet ports) — pick the 2-port SKU when the cabinet needs a second Ethernet connection point without adding a separate switch.
Surge-Prone Field Wiring ProtectionAll 4 serial ports carry built-in 15KV ESD surge protection, guarding against lightning-induced or electrostatic transients common on long field serial cable runs.
Not a good fit if:
- Not a network switch — 1 or 2 Ethernet ports only bridge serial traffic to IP; no VLAN/RSTP/ring-network switching between multiple LAN devices.
- IP40 enclosure only — needs a cabinet or additional protection for direct outdoor rain/dust exposure.
- DC5V (5–24VDC) power only — no AC220V option on this series; sites with only AC mains need a separate DC5V power adapter.
Key Features
- 1 or 2 × 10/100M auto-adaptive Ethernet port(s) for fast serial-to-network connectivity
- High-performance 32-bit 100MHz processor with ample memory
- Remote parameter configuration via WEB browser over the network
- Built-in 15KV ESD surge protection on all serial ports
- Intuitive bilingual Chinese/English configuration menu for easier setup
- Flexible RS-232/485 serial port combination
- Custom terminal-block power connector available for easy wiring
- DIN-rail or wall-mount installation
Specifications
Performance
| CPU | 32-bit 100MHz |
| Memory | 2MB |
| Ethernet Rate | 10/100Mbps auto-adaptive, manual setting supported |
| Communication Mode | 10M half/full duplex, 100M half/full duplex |
| Port Protection | 15KV electromagnetic isolation |
Serial & Ethernet Interface
| RJ45 Ethernet | Up to 2×10/100Base-T(X) — 1 or 2 ports selectable (-1T/-2T) |
| Serial Ports | 4 × RS-232/485 |
| Connector Type | Terminal block / DB-9 |
| RS-232 Signal | TxD, RxD, GND |
| RS-485 Signal (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 | 300bps – 230.4Kbps |
| Protocols | DHCP, Telnet, TCP, UDP, IP, ICMP, ARP, Modbus TCP/IP |
| Virtual COM Driver | Windows NT/2000/XP/Vista/7/10/11 |
Power
| DC Input | DC5V, supports 5–24VDC range |
| Power Consumption | Max 4 W |
| Power Protection | Reverse-polarity & overload protection |
| Other Power Options | None — DC5V (5–24V) only, no AC220V option on this series |
Environment
| Standard Temp | -10 ~ 60°C |
| Wide Temp (optional) | -40 ~ 75°C |
| Storage Temp | -40 ~ 85°C |
| Humidity | 5–95% non-condensing |
Physical
| Housing | IP40 metal enclosure |
| Mounting | Wall-mount / DIN-rail |
| Dimensions | 135 (H) × 117 (D) × 50 (W) mm |
Certification
| EMC | CE, FCC |
| EMI | FCC Part 15, CISPR (EN55022) Class A |
| EMS | EN61000-4-2/3/4/5/6/8 Level 3 |
| 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 |
|---|---|---|
| ZJTS804D-1T-S-232 | 4-port RS-232 serial device server, 1×10/100M auto-adaptive Ethernet port, DIN-rail mount, DC5V (5–24V) power. | |
| ZJTS804D-1T-S-485 | 4-port RS-485 serial device server, 1×10/100M auto-adaptive Ethernet port, DIN-rail mount, DC5V (5–24V) power. | |
| ZJTS804D-1T-M | 4-port RS-232/485 combo serial device server, 1×10/100M auto-adaptive Ethernet port, DIN-rail mount, DC5V (5–24V) power. | |
| ZJTS804D-2T-S-232 | 4-port RS-232 serial device server, 2×10/100M auto-adaptive Ethernet ports, DIN-rail mount, DC5V (5–24V) power. | |
| ZJTS804D-2T-S-485 | 4-port RS-485 serial device server, 2×10/100M auto-adaptive Ethernet ports, DIN-rail mount, DC5V (5–24V) power. | |
| ZJTS804D-2T-M | 4-port RS-232/485 combo serial device server, 2×10/100M auto-adaptive Ethernet ports, DIN-rail mount, DC5V (5–24V) power. |
Model code: -1T = 1×10/100M Ethernet port, -2T = 2×10/100M Ethernet ports; -S-232 = 4×RS-232 only, -S-485 = 4×RS-485 only, -M = RS-232/RS-485 combo (selectable per port). All 6 SKUs share the same DC5V (5–24V) power input and DIN-rail housing; a wide-temperature (-40~75°C) option is available on request.
Dimensions
unit: mm
Your Brand. Our Factory.Neutral casing, ready for your logo · Custom port/power options · Small batches welcome.
Custom & OEM →DIN-Rail Serial Device Server FAQ — ZJTS804D
What is the difference between the -1T and -2T versions?
The Ethernet port count. The -1T build has 1 × 10/100Base-T(X) port; the -2T build has 2, both auto-adaptive 10/100Mbps with manual setting supported. Serial capacity is identical — 4 × RS-232/485 on terminal block or DB-9 connectors — so choose -2T when you want a second network connection.
How does the ZJTS804D mount inside a cabinet?
It clips onto a standard DIN rail or screws to a wall — the compact 135×117×50 mm IP40 metal enclosure fits alongside breakers and PLC modules in the same cabinet. That makes it the natural pick over desktop models when the serial equipment already lives in a control cabinet.
What power input does it need? Is there an AC version?
This series is DC-only: DC5V nominal with a wide 5–24VDC input range, drawing 4 W maximum, with reverse-polarity and overload protection. There is no AC220V option on the ZJTS804D — if you need mains AC input, look at the desktop ZJTS804 instead, which offers both.
How is each serial port protected against surges?
Every serial port carries built-in 15KV ESD surge protection with electromagnetic isolation, and the unit meets EN61000-4-2/3/4/5/6/8 at Level 3 plus IEC60068 shock, free-fall and vibration standards. That protects RS-485 field buses running near motors, contactors and long outdoor cable runs.
Which protocols and configuration methods does it support?
Configuration is remote via WEB browser; protocols include DHCP, Telnet, TCP, UDP, IP, ICMP, ARP and Modbus TCP/IP. The Windows virtual COM driver (NT through 11) maps the 4 remote serial ports to local COM numbers. Serial side: 300 bps–230.4 Kbps, data bits 5–8, five parity modes, RTS/CTS and XON/XOFF flow control.
