- Emerson Remote Terminal Unit Instruction Manual

1-8 / Introduction CI-ControlWave Express
Table 1-1 - CPU/System Controller Board Connector Summary (Continued)
Ref. # Pins Function Notes
TB1 6-pin Solar Panel, Battery/Power Supply &
Aux Out,
Main Power Connector
See Section 2.3.9
TB2 2-pin Secondary battery input
TB3 8-pin Term. Block (COM2 - RS-232) See Table 2-3A or 4-2
TB4 5-pin Term. Block (COM3 – RS-232/RS-485) See Table 2-3C or 4-3
TB5 4-pin Pulse Input Connector
TB6 3-pin RTD Input See Section 2.3.5
CPU/System Controller Board Optional Ethernet Port Connector J1
An optional Ethernet port is supported via 8-pin RJ-45 connector J1. The 10/100Base-T
Ethernet interface is implemented using an SMSC LAN91C111 controller. This device
provides for full or half-duplex implementation. It should be noted that units equipped with
an Ethernet Port do not support a Solar Panel or provide an Auxiliary Power Output.
CPU/System Controller Board Serial Comm. Port Connectors (see Section 1.5.5)
The CPU Module supports up to three serial communication ports (COM1, COM2 &
COM3). COM1 utilizes either a male 9-pin D-Type connector, or a male 3-pin connector –
choice of the active connector is determined by jumper W18. COM2 utilizes an 8-pin
Terminal Block and COM3 utilizes a 5-pin Terminal Block. COM1 and COM 2 support RS-
232 communications, COM3 can be configured to support RS-232 or RS-485
communications.
CPU/System Controller Board RTD Input Connector (also see Section 2.3.5)
Edge Connector TB6 (on 14MHz Ultra Low Power CPU/System Controller Boards) provides
connection to a 100-ohm platinum bulb (using the DIN 43760 curve). The common three-
wire configuration is accommodated. In this configuration, the return lead connects to the
RTD- terminal while the two junction leads (Sense and Excitation) connect to the RTD+
terminals.
CPU/System Controller Board Pulse Counter Input Connector (also see Section
2.3.4.9)
Edge Connector TB5 supports connection to two internally sourced Pulse Counter Inputs.
These inputs are sourced for 3.3V with a source current of 200μA and a maximum input
frequency of 10kHz. Pulse Counter inputs are not supported with debounce circuitry and
therefore should not be used with relays. Note: Pulse Counter Inputs can also be
configured for DI operation via ControlWave Designer.
CPU/System Controller Board Power Connections
A 6-position Terminal Block is provided for input power wiring as follows:
• TB1-1 - Solar Power In+: Power from a 1W - 6V, 5W - 6V or 5W - 12V Solar Panel
(Internally wired to recharge a user supplied battery) *
• TB1-2 - Ground (GND)
• TB1-3 - Primary Power: Power from a user supplied nominal +6Vdc, +12Vdc or
+24Vdc power supply (depending on the type of CPU)
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