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iTDC Quick Installation Guide
Mar.11.2010
3.3.2 RS422 COMMUNICATION CONNECTION USING TCP/IP MODULE (IIM7100A)
Using an IP (TCP/IP module), multiple iTDCs can communicate with the Host PC. When connecting multiple
devices, you can connect up to 32 devices for 1 loop
1) Connection between Host PC and the First iTDC/iTDC-SR
Attach TCP/IP module on the fist iTDC/iTDC-SR and then connect it with the host computer by LAN cable.
2) Connection between the First iTDC/iTDC-SR and Following iTDC/iTDC-SR
First, connect the first iTDC/iTDC-SR to the second iTDC/iTDC-SR in cross connection as follow;
- Connect RS422-TX(+) Port of the first iTDC/iTDC-SR to RS422-RX(+) Port of the second iTDC/iTDC-SR.
- Connect RS422-TX(-) Port of the first iTDC/iTDC-SR to RS422-RX(-) Port of the second iTDC/iTDC-SR.
- Connect RS422-RX(+) Port of the first iTDC/iTDC-SR to RS422-TX(+) Port of the second iTDC/iTDC-SR.
- Connect RS422-RX(-) Port of the first iTDC/iTDC-SR to RS422-TX(-) Port of the second iTDC/iTDC-SR.
Next, from the second iTDC/iTDC-SR connect one iTDC/iTDC-SR to the following iTDC/iTDC-SR in direct
connection as follow;
- Connect RS422-TX(+) Port of the one iTDC/iTDC-SR to RS422-TX(+) Port of the following iTDC/iTDC-SR.
- Connect RS422-TX(-) Port of the one iTDC/iTDC-SR to RS422-TX(-) Port of the following iTDC/iTDC-SR.
- Connect RS422-RX(+) Port of the one iTDC/iTDC-SR to RS422-RX(+) Port of the following iTDC/iTDC-SR.
- Connect RS422-RX(-) Port of the one iTDC/iTDC-SR to RS422-RX(-) Port of the following iTDC/iTDC-SR.
iTDC #1
iTDC #2
iTDC #n
RX+
TX+
TX+
RX-
TX-
TX-
TX+
RX+
RX+
TX-
RX-
RX-
(Table: RS422 Multiple Connection Using TCP/IP Module)
Cross Connection
Direct Connection
