ControlWave Express Instruction Manual (CI-ControlWave Express)
2-14 Installation Revised Mar-2011
Terminal Block
Connector TB2
The ControlWave Express includes an alternative power connecter,
TB2, to provide power if none is available at TB1. For example, you
can connect a bulk DC power supply to TB2 to handle situations where
the solar panel/battery does not have sufficient power.
TB2 connections are:
TB2-1 = Power Input
TB2-2 = Ground (GND)
2.3.5 Connections to RS-232 Serial Port(s) on the CPU/System
Controller Board
An RS-232 port provides point-to-point, half-duplex and full-duplex
communications (for a maximum of 20 feet using data quality cable).
Your CPU includes two RS-232 ports and one port configurable for
either RS-232 or RS-485 operation.
RS-232 COM
Port Names and
Connectors
RS-232 COM ports use different connector types.
Table 2-5. RS-232 Connectors
Connector Name # Pins and Type Notes
J4 COM1 9-pin male D-type Choice of active connector for COM1
determined by jumper W18.
J11 COM1 3-pin male Choice of active connector for COM1
determined by jumper W18.
TB3 COM2 8-pin terminal block
TB4 COM3 5-pin terminal block This port can be configured as either RS-232
or RS-485. See Section 2.3.6 for more
information.
RS-232
COM1/COM2
Port Cables
For the ControlWave Express, half-duplex communications use Modbus
or BSAP protocol, while full-duplex communications use point-to-point
protocol (PPP). RS-232 ports use a “null modem” cable (see Figure 2-6)
to connect with other devices (such as a PC, a printer, another
ControlWave [except the CW_10/30/35]) when the ControlWave
Express uses the full-duplex PPP protocol.
Note: You can configure the ControlWave Express as either a master
or slave node on a Modbus or BSAP network.
Figure 2-5 illustrates the CPU module’s male 9-pin D-type connector.
for COM1. Use the content provided in Table 2-8 to determine pin
assignments for the COM1 and COM2 ports.
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