Instruction manual

3-12 3. n : 1 Connection (Multi-link 2)
• The ZM-300 and ZM-42 to 82 series can be used together. The ZM-42 to 82 series can
be the master station. (However, when ZM-42/43 is the master station, the slave station
must be ZM-42/43. Also, depending on the hardware version of the ZM-42 to 82 series,
multi-link 2 connection may not be supported. Refer to the ZM-42 to 82 User’s Manual.)
Wiring
Connection
(a) Connection between PLC ↔ ZM-300 master station
The communication parameter setting and connecting method are the same as
those for 1 : 1 connection. (Refer to “Chapter 5 Connection to PLCs.”)
(b)(c) Connection between ZM-300 series master station ↔ ZM-300 slave station
The connecting port for the ZM-300 series master station depends on the selection
for [Multi-Link] (either [Modular Jack 1] or [Modular Jack 2]) on the ZM-71SE editor.
Selection of [Modular Jack 2] is recommended. ([Editor Port] is set as default for
[Modular Jack 1].) The connecting port of the ZM-300 series slave station should be
CN1. It is recommended that CN1 be equipped with a terminal converter “ZM-1TC”
(set to 2-wire connection). The multi-link 2 master cable (b) (ZM-80MC) is 3 m long.
If the distance (c) between the ZM-300 series master station and the ZM-300 series
slave station is longer than 3 m, use a terminal block and connect the cables.
(d)(e) Connection between ZM-300 series slave station ↔ ZM-300 slave station
Use the RS-485 2-wire connection. It is recommended that CN1 be equipped with a
terminal converter “ZM-1TC” (set to 2-wire connection).
(b)(c)(d)(e) The maximum length between ZM-300 series should be 500 m.
* To avoid line-noise problems, connect one terminal only so that the shielded frame ground
of each cable will not be connected between the ZM-300 series.
The shielded frame ground of ZM-80MC must be connected to the ZM-1TC series master
station.
* When the terminal converter “ZM-1TC” is not used, install jumpers between +RD/+SD and
−RD/−SD.
PLC
CN1CN1 MJ2
(a)
(b)
(c)
(d) (e)
CN1CN1
Communications between ZM-300 series: RS-485 (2-wire), maximum length = 500 m
ZM-300 master station
(= Local Port 1)
ZM-300 slave station
(= Local Port 2)
ZM-300 slave station
(= Local Port 3)
ZM-300 slave station
(= Local Port 4)
Terminal block