Figure 48: Com1 Port Cpe400 - GE PACSystems RX7i Reference Manual
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- User manual (276 pages) ,
- Cpu programmer's reference manual (469 pages)
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Chapter 5. Communications
COM1 (RS232, RJ45 Connector)
The RJ45 Connector is provided for COM1 on CPE400
79
Pin No.
Signal Name
1
NC
2
NC
3
TX
4
RX
5
0V
6
NC
7
NC
8
NC
COM2 (RS-485, 15-pin Female D-sub Connector) –RX7i CPU/CRU Models
This port does not supply +5Vdc volts, therefore RS-485 to RS-232 conversion requires a converter that
is self-powered. It does not support the RS-485 to RS-232 adapter IC690ACC901.
This is a DCE port that allows a simple straight-through cable to connect with a standard AT-style
RS-232 port.
COM2 RS-485 Signals
Pin No. Signal Name Description
1
Shield
Cable Shield
Located at the bottom right of the connector
as viewed from the front of the module.
2
NC
No Connection
3
NC
No Connection
4
NC
No Connection
5
NC
No Connection
6
RTS(A)
Differential Request to Send A
7
0V
Signal Ground
8
CTS(B')
Differential Clear To Send
80
9
RT
Resistor Termination
80,81
10
RD(A')
Differential Receive Data A
81
11
RD(B')
Differential Receive Data B
12
SD(A)
Differential Send Data A
13
SD(B)
Differential Send Data B
14
RTS(B')
Differential Request To Send B
15
CTS(A')
Differential Clear To Send A
79
Pin 1 is the leftmost pin as shown in Figure 48.
80
To provide termination using the built-in 120Ω resistor, install a jumper between pins 9 and 10.
81
To provide termination using an external resistor, connect a user-supplied resistor across pins 10 and 11.
192
Description
No Connection
No Connection
Transmit Data
Receive Data
Signal Ground
No Connection
No Connection
No Connection
PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual
16
only. It has the following pinout.
Figure 48: COM1 Port CPE400
GFK-2222AD
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