Gree GMVGMS-GW12 handleiding

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UM Version 1.1 7 GMVGMSGW 1/12

3.1.3 RS-485 Line 2, Power*, BACnet MSTP, Modbus RTU Connector

Pin

Number

Pin Name

Function

1 VDC+ + VDC – Power, positive Input/Output

2 VDC- - VDC – Power, negative Input/Output

3 L2 A RS-485 Gree split line 2, A terminal

4 L2 B RS-485 Gree split line 2, B terminal

5 BAC A RS485 A – BACnet MSTP / Modbus RTU

6 BAC B RS485 B – BACnet MSTP / Modbus RTU

Table 4 – RS-485 Line 2, Power, BACnet , Modbus Connector

By default, terminals BAC A and BAC B are used as an RS485 Interface line for DTE

connection. GMS GW supports the following RS485-based protocol:

• BACnet MSTP

• Modbus RTU (Slave mode)

3.1.4 Power Connector

The GMS GW can be powered by one of the following methods:

• AC/DC adapter (in the box) via VDC+ and VDC- terminals

• 9-24V DC from HVAC or other equipment via VDC+ and VDC- terminals

• USB device port

3.1.5 ETH Connector

The GMS GW incorporates an IEEE 802.3 compatible 10/100 Mb/s Ethernet port via an RJ45

connector. Below are the main port specifications:

Parameter Value Notes

Max Ethernet cable length 137m CAT5 twisted pair cable

Bit Rate 10/100 Mb/s

Supported Ethernet Protocols 10BASE-T/100BASE-TX

Protocol Auto-Negotiation Enabled Against Link Partner

Table 5 - Ethernet port specifications

The RJ45

connector includes Link and Activity indication LEDs used as specified below:

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