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