Manufacturer product photo · industrial environment monitoring host, DC48V compact version (EMS-200-150)
EMS-200-150
IoT Gateway · Environment Monitoring Host
Compact Industrial IoT Gateway · 2×RS-485 + 6×DI Environment Monitoring Host · DC48V
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◆2×RS-485 + 6×DI
◆1U 19-Inch Rack-Mount
◆Compact 180×44×96.5mm
◆DC48V Input
◆Modbus TCP/RTU + Syslog
◆5-Year Warranty
Overview
The EMS-200-150 is a compact industrial IoT gateway and environment monitoring host that connects RS-485 serial devices and digital-input sensors to a TCP/IP Ethernet network through 2 × RS-485 ports and 6 × DI channels. Compared with the full-featured EMS-200, this version omits the RS-232 port and DO relay outputs, keeping the same 32-bit processor, Modbus TCP/RTU/ASCII, SNMP MIB-II and Syslog support inside a smaller 180×44×96.5mm 1U rack-mount chassis. Powered by DC48V (36–56VDC input, 230mA@12V), its I/O is limited to 6 × DI digital inputs with no relay/DO output, making it suited to status-monitoring points rather than remote switching control.
Is This the Right Fit?
Six real deployment scenarios matched to this model's actual datasheet specifications.
Server / Equipment Room Environment Monitoring6 × DI digital inputs plus 2 × RS-485 ports let a single 1U EMS-200-150 collect door/water/smoke alarm contacts and poll Modbus RTU sensors in the same equipment room, feeding readings to a Modbus TCP monitoring platform over Ethernet.
Unheated / Extreme-Temperature Cabinet SitesAn optional wide-temperature build extends operation from the standard -10~60°C to -40~+75°C, suiting unheated equipment rooms and outdoor cabinets exposed to seasonal extremes.
Pure Status Monitoring Without Control OutputsWith only 6 × DI digital inputs and no DO relay outputs, the EMS-200-150 is built for points that only need state acquisition (open/closed, alarm contacts) rather than remote on/off switching.
Space-Constrained Cabinet InstallationAt 180×44×96.5mm, the EMS-200-150 is noticeably smaller than the full-featured EMS-200 (240×44×110mm), freeing rack depth and width in tight cabinets.
Centralized Log Server IntegrationBuilt-in support for the Syslog standard logging protocol (alongside Modbus/SNMP/HTTP) — a capability this compact model adds beyond the base EMS-200 — lets it forward events directly to an existing centralized syslog server.
Two Independent RS-485 Monitoring LoopsThe 2 × RS-485 ports (terminal block, Data+/Data-) can each address a separate Modbus RTU device chain, letting one host poll two independent groups of serial sensors or meters at speeds from 110 to 460,800bps.
Not a good fit if:
- No RS-232 port — only 2 × RS-485 ports are available, so RS-232-only serial devices cannot be connected directly.
- No DO relay outputs — only 6 × DI digital inputs are provided, so remote switching/control of external circuits is not supported; monitoring only.
- IP40 enclosure only — needs a rack cabinet or additional protection for direct outdoor rain/dust exposure.
Key Features
- 32-bit high-performance processor for stable, reliable operation
- Modbus TCP and Modbus RTU/ASCII protocol support
- Local real-time clock with Modbus alarm-record storage
- Windows Real COM driver plus Unix/Linux TTY driver
- Generic Socket modes — TCP Server/Client and UDP
- Serial-tunneling mode links two peer serial devices over the network without adding a PC
- 10/100M auto-negotiating Ethernet port, manual setting supported
- All serial and I/O signals carry built-in 15KV ESD protection
- SNMP MIB-II support for standard network management
- Syslog standard logging protocol support
- Web / Telnet / Console management for easy configuration and maintenance
Specifications
LAN
| Ethernet | 10/100 Mbps, RJ45 |
| Protection | Built-in 1.5KV electromagnetic protection |
Serial Interfaces
| Quantity | 2 × RS-485 |
| Port Type | Terminal block |
| RS-485 Signal | Data+, Data- |
| Port Protection | All signals 15KV ESD protection |
| Parity | None, Even, Odd, Mark, Space |
| Data Bits | 5, 6, 7, 8, 9 |
| Stop Bits | 1, 1.5, 2 |
| Flow Control | Xon/Xoff |
| Speed | 110 ~ 460,800 bps |
I/O Interface
| Quantity | 6 × DI |
| Port Protection | All I/O ports photoelectric/electromagnetic isolation protection |
Power Output
| DC Power Output | 12V/30W high-power DC output |
Software Features
| Protocol | Modbus, ICMP, IP, TCP, UDP, DHCP, Telnet, SNMP, HTTP, Syslog |
| Tool | Windows 2000/XP management software supported |
| Driver Support | Windows 2000/XP Real COM driver, Unix/Linux TTY driver |
| Configuration | Web browser, Telnet, Console |
Input Power Requirement
| 48V Power Input | Input range 36–56V DC |
| Power Consumption | 230mA @ 12V |
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 | Standard rack-mount |
| Dimensions | 180 (W) × 44 (H) × 96.5 (D) mm |
Warranty & Reliability
| MTBF | 320,000 hours |
| Warranty | 5 years |
Models & Ordering
| Model | Product Description | Price |
|---|---|---|
| ZJEMS-200-150-DCH | 19-inch 1U rack-mount environment monitoring host — 2×RS-485, 6×DI, supports Modbus RTU, Modbus TCP, virtual serial port and TCP Socket modes; SNMP supported, IP40, DC48V powered. |
This page covers the model requested as EMS-200-150. The datasheet order code is ZJEMS-200-150-DCH (chassis silkscreen: ZJEMS-150), denoting the DC48V-powered 2×RS-485 + 6×DI environment monitoring host. No other port or power variant is listed in this datasheet.
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 wire it
Written for the EMS-200-150 (order code ZJEMS-200-150-DCH) from its own specifications: 2 × RS-485 ports and 6 × DI inputs, no RS-232 and no relay output, Modbus TCP/RTU/ASCII, SNMP MIB-II and Syslog, 12V/30W DC output for sensors, DC48V input (36–56V DC), 180 × 44 × 96.5 mm.
Who it is for
- Telecom and base-station operators — Runs on the site's 48V DC (36–56V DC input) and reports door, water-leak and smoke contacts from unmanned shelters on its 6 DI inputs; the optional -40 to +75°C build suits unheated sites.
- Small server rooms and network cabinets — At 180 × 44 × 96.5 mm it fits shallow wall cabinets, and 2 RS-485 ports read Modbus RTU temperature/humidity sensors or a UPS while the DI inputs watch doors and leaks.
- IT and NOC teams with a syslog server — SNMP MIB-II and Syslog support let the unit sit in the same NMS and central log server as the switches and routers, with a web, Telnet or console interface for setup.
- Projects that only need status monitoring — With 6 DI and no relay output it reads open/closed and alarm states but switches nothing on site, a lower-cost fit where control is handled by other equipment.
Where and how to install
- Inside a rack or cabinet — The housing is an IP40 metal case, 180 × 44 × 96.5 mm, for rack mounting. Install it in the equipment rack or a closed outdoor cabinet, never exposed to rain or dust. It is much narrower than a 19-inch rack, so confirm the rack ears with us or fix it on a cabinet shelf.
- Power from the 48V DC bus — Feed it from the 48V DC distribution through its own breaker or fuse (input 36–56V DC) and check polarity before switching on. Keep it on the battery-backed side so the host still reports while mains is down, which is when door and temperature alarms matter most.
- DI wiring: one sensor per input — Connect switch-output sensors (door contact, water leak, smoke) to the 6 DI inputs and name each input in the web console. Sensors that need power can take it from the 12V/30W DC output; run sensor cable away from mains cables.
- Two RS-485 buses — Each RS-485 port has Data+ and Data- terminals. Use shielded twisted pair, chain the devices one after another, give each Modbus RTU device its own address and match baud rate and parity. A common split is sensors on one port and the UPS or air conditioner on the other.
- Temperature range — The standard build works from -10 to +60°C at 5–95% humidity, non-condensing. Shelters or outdoor cabinets that go colder or hotter need the wide-temperature build (-40 to +75°C), which must be requested when ordering.
Interfaces and limits at a glance
Count your monitoring points against this table before ordering. If you need an RS-232 device, a third RS-485 bus, more than 6 contact sensors or a relay to switch a siren, the larger EMS-200 is the model in the same series.
| EMS-200-150 (ZJEMS-200-150-DCH) | |
|---|---|
| Serial ports | 2 × RS-485 (terminal block, Data+/Data-); no RS-232 |
| Serial speed / protection | 110–460800 bps; 15KV ESD on all signals |
| Digital inputs (switch sensors) | 6 × DI, isolated |
| Relay outputs | None |
| Analog inputs (4–20 mA / 0–10 V) | Not listed |
| Power output for sensors | 12V / 30W DC (= 2.5 A total) |
| Ethernet | 1 × RJ45 10/100 Mbps (copper ≤ 100 m) |
| Protocols / management | Modbus TCP/RTU/ASCII, SNMP MIB-II, Syslog, HTTP, Telnet, DHCP; Web / Telnet / Console |
| Power input | DC48V, range 36–56V DC |
| Operating temperature | -10 to +60°C (wide-temp build -40 to +75°C) |
| Housing / size | IP40 metal, 180 × 44 × 96.5 mm, rack mount |
- Up to 6 contact sensors (doors, water leak, smoke) with one sensor per input, so each alarm shows which point tripped.
- For temperature and humidity, choose RS-485 Modbus RTU sensors, since no analog input is listed.
- Keep everything on the 12V output under 30 W in total.
Values are from this page's specification table; 2.5 A = 30 W ÷ 12 V. The 100 m copper limit is the general Ethernet rule, not a page value.
Industrial IoT Gateway FAQ — EMS-200-150
What devices can I connect to the EMS-200-150?
Two RS-485 serial ports on terminal blocks (110 to 460,800 bps) and six digital-input channels, all bridged to a 10/100 Mbps Ethernet port. Typical loads are meters, sensors and other Modbus RTU/ASCII field devices that need to reach a Modbus TCP master or monitoring platform.
How is the EMS-200-150 different from the EMS-200?
This version omits the RS-232 port and the DO relay outputs: you get 2 × RS-485 and 6 × DI only, in a smaller 180 × 44 × 96.5 mm 1U chassis. The 32-bit processor, Modbus TCP/RTU/ASCII, SNMP and Syslog support stay the same — pick it when relay output control is not required.
How is it powered on site?
It takes 48 V DC nominal with a wide 36–56 V DC input range and draws about 230 mA at 12 V. A 12 V / 30 W high-power DC output is also available to feed sensors or small field devices, saving a separate power supply in compact monitoring cabinets.
Is it protected enough for harsh equipment rooms?
Serial signals carry 15 kV ESD protection, all I/O ports use photoelectric and electromagnetic isolation, and the Ethernet port has built-in 1.5 kV electromagnetic protection. Standard units run -10 to +60 °C and the wide-temperature range covers -40 to +75 °C, in an IP40 metal enclosure rated 320,000 hours MTBF.
How do I configure and integrate it with my software?
Configure via web browser, Telnet or console, with Windows management software plus Real COM (Windows) and TTY (Unix/Linux) drivers for legacy serial applications. Protocol support covers Modbus, TCP/UDP, DHCP, Telnet, SNMP, HTTP and Syslog, fitting both SCADA polling and IT-style monitoring. Warranty is 5 years.
Can the EMS-200-150 read 4–20 mA or 0–10 V analog sensors?
No analog input is listed: the EMS-200-150 has 6 DI contact inputs and 2 RS-485 ports only. For temperature, humidity or other measured values, use sensors with an RS-485 Modbus RTU output, which it polls on the serial ports. If you already have 4–20 mA transmitters, tell us the models before ordering so we can suggest a converter or another unit.
How does the EMS-200-150 report an alarm: SMS, email, SNMP or Syslog?
It can forward events to a central Syslog server, and a monitoring platform, SCADA or NMS can read its states over Modbus TCP or SNMP MIB-II; it also keeps a Modbus alarm log with a local real-time clock. SMS, email and SNMP trap sending are not listed, and there is no cellular modem or relay output for a local siren. If you need push notifications or a siren on site, confirm with us, or use the EMS-200, which has 2 relay outputs.
I have more than 6 alarm contacts. Can several sensors share one DI input on the EMS-200-150?
Electrically, yes, as general practice: normally-closed contacts are wired in series and normally-open contacts in parallel on one input, for example all water-leak sensors in one room. The catch is that the alarm then only says the group tripped, not which sensor. If every point must be reported separately, use the EMS-200 with 8 DI inputs or add a second unit.
How many Modbus RTU devices can each RS-485 port of the EMS-200-150 handle, and how long can the cable be?
The page does not state a device count per port. As general RS-485 practice, one bus carries up to 32 standard unit loads over about 1200 m at low baud rates, each Modbus RTU device needs a unique address, and polling many devices slows the update time. Use 9600 bps or similar for long runs, shielded twisted pair with 120 Ω termination at both far ends, and split devices across the 2 ports.
Can the EMS-200-150's 12V output power my sensors?
Yes, within 12V/30W, which is 2.5 A in total. Add up each sensor's draw from its own datasheet, for example smoke detectors and powered temperature/humidity sensors, and keep a margin below 30 W. Anything heavier, such as a siren or strobe, needs its own supply, and switching it needs a relay, which this model does not have.
What power connector does the EMS-200-150 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 EMS-200-150 for your order.
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