Network Installation; Network Accessory; Network Cables - Unitech MR350 MKII Technical Reference Manual

Installation procedure:
1) Embed all the required signal lines (including +13.5V and ground) into the
wall.
2) Route your signal lines through backplate or front cabinet. (see Figure 8-5
Routing cable through backplate
3) and Figure 8-6 Routing cable through front cabinet
4)
5) Refer to "Terminal Mounting Preparation" on page 8-75 to secure your
backplate to wall.
8.3.

Network Installation

The hardware and multi-point communication protocol supported in
MR350MKII allows users to make networking of MR350MKII up to maximum
of 32 units in multi-drop through one RS422/485 channel to a serial port of
host/PC. The interface of networking can be either 4-wire RS422 or 2-wire
RS485. There are two jumpers on the main board of MR350MKII that are needed
to be set accordingly in order to link via 4-wire RS422 or 2-wire RS485 cabling.
RS422 (4 wires)
RS485 (2 wires)

8.3.1. Network Accessory

The family of MR350MKII has several accessories including:
MR033 (RS422/485 T-junction box),
MR034 (RS232 to RS422/485 Conversion box),
EPC402 (RS232 to RS422/485 Signal converter), and
MR035 (RS422/485 Signal repeater).
These accessories provide users convenience and flexibility to make RS422/485
network connection of MR350MKII. The usage of each accessory is described
detailed in following paragraphs.

8.3.2. Network Cables

The cables in multi-drop connection network should comply with the following
specifications:
3 2 1
J9 ???
J10 ???
J9 ???
J10 ???
8-80