d Serial 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.
1
ON
234
J1
SCP 104 Rotated Rear Panel
To Computer or
Control System
RS-232 Port
9-pin HD
Connector
Ground
Rx
Receive
Transmit
Tx
3
Transmit (Tx)
Receive (Rx)
2
Ground (G)
5
G
Figure 6. Connecting a Host to the SCP 104
SCP 104 and SCP 226 • Installation and Operation
10
