The first edition:
APR. 2007 [IMQ00]
The second edition: DEC. 2015 [IMQ00]
®
RKC INSTRUMENT INC.
HEADQUARTERS: 16-6, KUGAHARA 5-CHOME, OHTA-KU TOKYO 146-8515 JAPAN
PHONE: 03-3751-9799 (+81 3 3751 9799)
E-mail: [email protected]
FAX:
03-3751-8585 (+81 3 3751 8585)
DEC. 2015
Ethernet is a registered trademark of Xerox Corp.
Modbus is a registered trademark of Schneider Electric
Company names and product names used in this manual are the trademarks or registered
trademarks of the respective companies.
2.3 Connection to Ethernet
Pin layout of connector
Pin layout
Modular connector
for Ethernet
RJ-45
1
8
Pin No.
Signal name
Symbol
1 Send
data
TX
2 Send
data
TX
3 Receive
data
RX
4 Unused
5 Unused
6 Receive
data
RX
7 Unused
8 Unused
The cable must be provided by the customer.
Used cable:
The cable is based on the 10BASE-T or the
100BASE-TX standard of Ethernet.
Used connector: RJ-45 type
Wiring example
When directly connected to client
Use a cross cable when directly connected to the client (such as computer).
TX
TX
RX
RX
TX
TX
RX
RX
Computer
COM-JL
Cross cable
When use network hub
Use straight cables when connected to the network hub.
Network hub
TX
TX
RX
RX
TX
TX
RX
RX
TX
TX
RX
RX
TX
TX
RX
RX
Computer
COM-JL
Straight cable
Straight cable
Cross cables may be used depending on the connecting device used.
Therefore, follow the instructions for the respective device.
2.4 Connection to the Controllers
Conduct wiring between the COM-JL and controller (SRZ) as shown in the following.
Connection diagram
RS-485
Paired
wire
Shielded twisted
pair wire
Controller (SRZ)
Up to 16 Z-TIO modules can be connected.
R2
R2: Termination resistor for external
connection
(120
1/2
W)
3
4
5 SG
COM-JL
SG
1
5
4
R1
Terminal block
T/R (A)
T/R (B)
3
4
5 SG
T/R (B)
T/R (A)
T/R (B)
T/R (A)
Z-TIO module
Z-TIO module
The maximum number of SRZ modules (including other function modules) on the same
communication line is 31.
Connected by
the internal
communication
line
R1: Internal termination resistor
(Example:
120
1/2
W)
The cable must be provided by the customer.
The termination resistor existing within the COM-JL can be connected or
disconnected by the switch. (Factory set value: Termination resistor connected)
2.5 System Configuration Example
When directly connected to client
Power supply (24 V DC)
Ethernet
Computer
(Client)
Ethernet
[Modbus/TCP]
communication
converter COM-JL
(Server)
Controller
communication
(RS-485: Modbus)
SRZ unit
2
1
16 17
30 31
Internal communication line (RS-485)
Z-DIO module
Module
(Controller)
address
Z-TIO module
When use network hub
Ethernet
Network hub
Ethernet
Power supply (24 V DC)
Computer
(Client)
Ethernet
[Modbus/TCP]
communication
converter COM-JL
(Server)
Controller
communication
(RS-485: Modbus)
SRZ unit
2
1
16 17
30 31
Internal communication line (RS-485)
Z-DIO module
Module
(Controller)
address
Z-TIO module
The data request side (such as computer) is called “client” and the data
response (supply) side (COM-JL) is called “server.”
Basically, one client corresponds to one server (COM-JL) (i.e. one to one).
However, one client can communicate with two or more servers depending
on the program on the client side, but two or more clients cannot
communicate with one server.
3. SPECIFICATIONS
Ethernet communication
Physical layer:
Ethernet
10BASE-T/100BASE-TX automatic recognition
Application layer:
Modbus/TCP
Communication data:
Based on Modbus message format
Connector type:
RJ-45
Controller communication
Interface:
Based on RS-485, EIA standard
Protocol: Modbus-RTU
Communication speed: 9600 bps, 19200 bps, 38400 bps
Data bit configuration:
Data 8-bit, Without parity, Stop 1-bit
Maximum connections: 31 controllers * (SRZ modules)
* A combined total of up to 31 Z-TIO and Z-DIO modules can be
connected in the SRZ.
However, the maximum joinable number of functional modules of the
same type is 16.
General specifications
Power supply voltage:
24 V DC
Power supply voltage range:
21.6 to 26.4 V DC
Current consumption:
110 mA max.
Allowable ambient temperature:
10 to
50
C
Allowable ambient humidity:
5 to 95 %RH
(Absolute humidity: MAX.W.C 29.3 g/m
3
dry air at 101.3 kPa)
Installation environment conditions:
Indoor use
Altitude up to 2000 m
Weight:
Approx. 180 g
Standard
Safety standard:
UL:
UL61010-1
cUL: CAN/CSA-C22.2
No.61010-1
CE marking:
LVD: EN61010-1
EMC: EN61326-1
RCM:
EN55011
4. MODEL CODE
COM- JL - 1 02
(1) (2)
(1) Communication type
1: Modbus/TCP
(2) Corresponding to the RKC controller
02: SRZ
*
