DSerial port — Use this female 3-pole 3.5 mm captive screw connector to connect the SCP to the serial (RS-232\⤀port on your computer. Through this connection you can enter SIS commands to monitor and obtain information from the SCP (see "Wiring the RS-232 Port" for connection information\⤀.
Wiring the RS-232 Port
The RS-232 port provides the connection by which you can monitor and communicate with the SCP from a host computer using SIS commands (see the “Remote Communication” section, beginning on page 31\⤀.
The RS-232 protocol for this port is 9600 baud, 1 stop bit, no parity, 8 data bits, no flow control
Use a female 9-pin to bare wire RS-232 cable or a universal control cable (UC50' or UC100'\⤀ to connect a your computer or control system to the SCP as follows:
1.Wire the unterminated end of the RS-232 cable to the provided 3-pole captive screw plug as follows:
•• Connect the transmit wire to pin 1, which plugs into the transmit (Tx\⤀ port.
•• Connect the receive wire to pin 2, which plugs into the receive (Rx\⤀ port.
•• Connect the ground wire to pin 3, which plugs into the ground (G\⤀ port.
SCP 104 Rotated Rear Panel
J1
G | Ground | Ground (G) 5 |
Rx Receive | Transmit (Tx) 3 |
Tx | Transmit | Receive (Rx) 2 |
9-pin HD
Connector 
To Computer or
Control System
RS-232 Port
Figure 6. Connecting a Host to the SCP 104
10SCP 104 and SCP 226 • Installation and Operation