Table 5–4 COM3 and COM4 jumpers: W3, W5, W7, and W11
W3, W5, W7, and W11 – COM3, COM4 jumpers
COM Port
Interface
Jumper Settings
RS–232* W11[1–2]*
W5[4–6]* , W5[10–12]*
W7[1–2]* , W7[4–6]*, W7[5–7]*
RS–422
no termination
W11[1–3]
W7[1–2]* , W7[4–6]*, W7[5–7]*
RS–422
with termination
W11[1–3]
W7[1–2]* , W7[4–6]*, W7[5–7]*
W5[2–4]** , W5[8–10]**
RS–485
no termination
W11[2–4]
W7[1–3], W7[7–9]
COM3
RS–485
with termination
W11[2–4]
W7[1–3], W7[7–9]
W7[8–10]**
RS–232 W11[7–8]*
W5[3–5]* , W5[9–11]*
W3[1–2]* , W3[4–6]*, W3[5–7]*
RS–422
no termination
W11[7–9]
W3[1–2]* , W3[4–6]*, W3[5–7]*
RS–422
with termination
W11[7–9]
W3[1–2]* , W3[4–6]*, W3[5–7]*
W5[1–3]** , W5[7–9]**
RS–485
no termination
W11[8–10]
W3[1–3], W3[7–9]
COM4
RS–485
with termination
W11[8–10]
W3[1–3], W3[7–9]
W3[8–10]**
* Default
** This jumper terminates the network. If the PC–600 is not at an end of the
network, leave these jumpers off .
Function and use of serial ports
COM1 as serial console device
You can use COM1 as a console device to communicate with another PC.
For COM1 to be a serial console, the video jumper W12[5–6] must be
removed. See the
Console devices
chapter for more information.
Mating receptacle
Use a VTC–20F or VTC–20M cable to connect the COM ports to external
serial equipment. The P2 and P3 connectors are DB–9 female (VTC–20F)
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