Wiring of the CM086 Board 4-3
Wiring Instructions
1. Locate terminal block at TC1 on the CM086 board. (See Figure 1-1 in this manual.)
TC1 should have 4 terminal locations (1, 2, 3 and 4) on it.
2. A twisted shielded wire should be used for connection to TC1. The shielded wire should
be separated and connected per the drawing below to eliminate interference due to
noise.
TO TC1
TERMINALS
TO TC2
(E)
WRAP BOTH ENDS
OF SHEATH WITH
INSULATING TAPE
CRIMP
SHIELD SHEATH
OUTER JACKET
DO NOT
CONNECT
TO
EXTERNAL
CIRCUIT
Figure 4-2. Shielded Wire Termination
3. The TC1 terminal block functions are described in the table below.
Terminal Block
Symbol
Pin
No.
Functions Remarks
1 S/R (+) RS-485 input/output (+) Use as input at
TC1 2 S/R (-) RS-485 input/output (-) parallel connection
3 S/R (+) RS-485 input/output (+) Use as output at
4 S/R (-) RS-485 input/output (-) parallel connection
TC2 Shield connection terminal -
Table 4-1. Functions of Terminal Block TC1
4. It is important that an appropriate wire size is selected. When the wire gauge is too thick,
it may apply pressure to the CM086 board and cause failure. When the wire gauge is too
thin, it may lead to incomplete contact or a break in the wire. The table below indicates
the suggested wire size to be used at TC1.
[mm
2
] AWG I [A] VAC [V]
Twisted wire 1.0 16 12 125
Single wire 1.5 16 12 125
UL - 22-16 10 300
CSA - 28-16 10 300
CSA - 28-16 10 150
Table 4-2. Applicable Wire Sizes for Terminal Block TC1
5. When stripping the wire end to be connected at TC1, approximately 5.5 mm of wire should be
exposed to make a good connection.
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