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2-4. Interface Connections
U3-1021
2-8
2/99
Westinghouse Proprietary Class 2C
Notes
1. Do not use unmarked terminal block locations.
2. Shield terminals (SH) are not connected in CE Mark certified systems.
Figure 2-2. Terminal Block Connections for the Link Controller Personality Module
1. COM is the galvanically isolated common terminal of the Applications Port.
2. Use an overall shield conductor for the Applications Port cable:
A. To ground the cable shield locally, connect the cable shield to terminal C17 (Earth Ground).
B. To ground the cable shield remotely, connect the cable shield to terminal C16 (SH).
3. Connect a wire jumper for the following:
A. To boot-up from an external IBM-compatible PC, connect a jumper between SEL and BT.
B. To set Programming Port baud rate to 9600 (default is 19200), connect a jumper between SEL and BAU.
4. For RS-485/RS-422 four wire applications, connect a wire jumper for the following:
A. To use a transmitter termination resistor, connect a jumper between RES (B14) and TX+ (B15).
B. To use a receiver termination resistor, connect a jumper between RES (A14) and RX+ (A15).
RS-232 Applications: (1C31169G01)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
A
RI CTS RX/ DCD
B
BAU SEL
DSR RTS TX/ DTR
C
BT. SEL
COM
SH
Earth
GND
Earth
GND
RS-485/RS-422 Four Wire Applications: (1C31169G02)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
A
RES RX+ RX-
B
BAU SEL
RES TX+ TX-
C
BT. SEL
COM
SH
Earth
GND
Earth
GND
Notes
For a four wire RS-485/RS-422 communications network, a receiver termination resistor is recommended
if the receiver is located at the end of the communications link. A transmitter termination resistor is
recommended if the transmitter is at the end of the communications link and if the transmitter is tri-stated
(disabled) when data is not being transmitted. Otherwise, a transmitter termination resistor is not necessary.