Minebea CSD-903-EX, Instruction Manual

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13
2-5. Connection with 2-wires Serial interface
This is the 2-wires method serial interface to connect with a printer, an external display unit, etc.
The 2-wires serial interface is connected with +, - and F.G. shown in the below figure.
・
Stripped length of electrical cable tip is 7 mm.
・
The tightening torque of terminal screws on the terminal block is 0.6 N
･
m.
・
Please use AWG28 ~ AWG16 for connecting cable.
・
There are M252B, etc., made by UNIPULSE as the equipment for the 2-wires method serial interface.
・
The cable must use two cores shielded cable as much as possible and connect the shield with F.G.
terminal. Please twist the cable when you don’t use the shielded cable.
(The applicable cable length is up to 100 m with shield, and up to 20 m without shield.)
・
The equipment for 2-wires method serial interface can be connected up to three in parallel.
(Maximum output current : Approx. DC20 mA)
・
The commons of the external control input and the 2-wires method serial interface are connected.
・
This internal circuit and photocoupler are insulated.
・
Please connect the shield with F.G. terminal of RS-485 interface/2-wires method serial interface
terminal by using the shielded cable when CSD-903 complies with the CE conformity or applied JIS
standard.
CSD-903Internal
equivalent circuit
Serial interface corresponding equipment
Applicable plug : XW4B-06B-H1 (made by OMRON)
Screw side of terminals