HM series IO module

HM series I/O module is used to expand the I/O points of Hailin HD and D series DDC controller. This series has multiple models, can be adapted to input and output points of different signal types according to the requirements of the project site, and can be economically combined into a complete and independent local control system. It has RS485 communication port, supports
ModBus RTU and BACnet MS/TP protocols, it is also a standard I/O module that can be connected the third party’s system.
Download

Specifications

MModel HM0008 HM0004 HM1405 HM0800 HM0704
Electrical characteristic Power Supply AC/DC24V±10%,50-60 Hz
Operating temp. & humidity 0~50℃(32~122℉);10~90% relative humidity, non-condensing
Storing temp. & humidity -40~70℃(-140~158℉);10~90% relative humidity, non-condensing
Communication RS-485 One RS-485 interface(1500Vrms isolated)
Baud rate:9600~115200(unit:bps default:9600bps)
Equipped with termination resistor:termination resistor selectable(enabled by button)
Data bit: 8; Stop bit: 1; Check: No check, even check, odd check (default: no check)
Protocol:Modbus RTU、BACnet MS/TP
Mode:Modbus sub-mode
W x L x H (mm) 120x149x58 120x149x58 180x149x58 120x149x58 120x149x58
Installation Screws are positioned on a flat or 35mm DIN rail mount
Material PC+ABS flame retardant
IP rating IP20

Models

ModelUIDIDOVOTotal pointsRS-485 interfaceReset buttonEOL button
(485 terminal resistance)
Support protocol
HM0008  8 81BACnet/ModBus
HM0004   441BACnet/ModBus
HM1405 145 191BACnet/ModBus
HM08008   81BACnet/ModBus
HM07044322111BACnet/ModBus

APPLICATION

RELATED NEWS

News HVAC Controls Wholesale: How to Vet a China Manufacturer Before Your First Container Order
On July 17, 2026
HVAC Controls Wholesale: How to Vet a China Manufacturer Before Your First Container Order
A structured 3-stage guide for HVAC distributors to evaluate Chinese manufacturers, including factory screening, quality control verification, sample testing, and commercial terms negotiation.
Learn More
News UL, CE and BTL Certified HVAC Controls: Why Certifications Matter for Global Distributors
On June 11, 2026
UL, CE and BTL Certified HVAC Controls: Why Certifications Matter for Global Distributors
Understand UL, CE, BTL, FCC, and RoHS certifications for HVAC controls. Market requirements by region, how to verify certificates, and common procurement pitfalls.
Learn More
News Fan Coil Thermostat Buyer’s Guide: 2-Pipe vs 4-Pipe Systems Explained
On May 29, 2026
Fan Coil Thermostat Buyer’s Guide: 2-Pipe vs 4-Pipe Systems Explained
Learn how 2-pipe and 4-pipe fan coil systems affect thermostat selection. Includes valve matching, changeover logic, power options, and a project-type selection matrix.
Learn More

We value your privacy

We use cookies to enhance your browsing experience, serve personalised ads or content, and analyse our traffic. By clicking "Accept All", you consent to our use of cookies.