VAF instruments PEM2, Technical Manual

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6. Only applicable if an additional (second) touch screen is connected to the T-Sense
®
system.
Additional touch screens are connected to the system as described in Figure 6.
Plug in a DB9 male connector into the COM1 output port at the aft side of touch screen 1 and
connect COM1 to the 5-pin terminal COM2 at touch screen 2 as described in Figure 6.
The cable connecting the two touch screens is a Modbus RS485 cable as specified in section 6.4.
Check for correct DC supply power and integrity of external wiring connections. Turn on power and
observe several readings, like torque, shaft speed, power etc. If not, check wiring and verify whether
the inputs are in agreement with actual value.
Figure 6 – Connection of a 2
nd
touch screen to COM1 output port of touchscreen 1
RS485
Modbus