15
2-6. SI-65(A/FA) Cable Connection
LAN
Connect to the LAN connector of SI-65(A/FA) with a LAN cable of category 5 or more.→ [
3-1. Connection to the Network ]
RS-422/485
Connect RS-422/485 terminal block of SI-65(A/FA) and RS-422/485 signal line of the target
device by using a twisted pair cable.
Proper RS-422/485 cable
Size :
AWG24-14 / single wire 0.2 - 2.5mm
2
/ twisted cable 0.12 - 1.5mm
2
Wire strip length: 6mm. Please do not make branch wire when using twisted cable.
If using the ferrule terminal, ferrule diameter should be 1.5mm or less.
Following are the recommendation.
Phoenix Contact Inc. "AI0.25-8YE AWG24"
JST Mfg. Co., Ltd." TUB-05 AWG26-22"
Send and (DataB)
Send and Recive - (DataA)
GND (SG)
SD+
SD-
SD/RD+
SD/RD-
GND
SI-65(A/FA)
Target Device
RS-485(half duplex) Setting
SD+
SD-
SD/RD+
SD/RD-
GND
SI-65(A/FA)
Target Device
RS-422 (full duplex) Setting
(RDB)
Receive- (RDA)
Send+ (SDB)
Send- (SDA)
GND (SG)
* ( ) are the examples of RS-422/485 differential signals.
Usually, differential signal [+] uses [B] and differential signal [-] uses [A].
* Connect the GND(SG) between devices to protect higher voltage runs into the other
device.
The following chart shows a connection example to connect the converter to more than two
devices in the half duplex mode by N to N.
* This multidrop system can connect up to 128 units.
*
The first unit and the “N” unit need a termination resistor.
○SD +
○SD -
○SD/RD +
○SD/RD -
○GND
○SD +
○SD -
○SD/RD +
○SD/RD -
○GND
○SD +
○SD -
○SD/RD +
○SD/RD -
○GND
○SD +
○SD -
○SD/RD +
○SD/RD -
○GND
・・・・・
SI-65(A/FA)
1st Unit
SI-65(A/FA)
2st Unit
SI-65(A/FA)
3st Unit
SI-65(A/FA)
Nst Unit
