- Emerson Remote Terminal Unit Instruction Manual

2-24 / Installation & Operation CI-ControlWave Express
• TB1-1 - Solar Power In + (TB1-2 = GND ) (GND = −)
• TB1-5 - Auxiliary Power Out + - for External Radio/Modem (TB1-6 = GND) (GND = −)
A secondary power input is available at connector TB2:
• TB2-1 – Input
• TB2-2 – Ground
ControlWave Express Terminal Blocks utilize compression-type terminals that
accommodate up to #16 AWG wire. A connection is made by inserting the wire’s bared end
(1/4” max) into the clamp adjacent to the screw and then securing the screw. The wire
should be inserted fully so that no bare wires are exposed to cause shorts. If using standard
wire, tin the bare end with solder to prevent flattening and improve conductivity. Allow
some slack in the wires when making connections. The slack makes the connections more
manageable and helps to minimize mechanical strain on the terminal blocks.
2.3.7.1 Bulk Power Supply Current Requirements
ControlWave Express RTUs are equipped with a CPU/System Controller Board that accepts
either 6/12Vdc or 12/24Vdc Bulk Power input. The maximum current required for a
particular ControlWave Express can be estimated as follows:
Bulk +6/12/24Vdc Supply Current = CPU/System Controller Board (with options) +
Process I/O Board + LCD Display Keypad + Optional External Modem/Radio
Table 2-11A - ControlWave Express Base Assembly Power Requirements
(for 14MHz Ultra Low Power CPU)
COMPONENTS Bulk 12Vdc
Supply
Bulk 6Vdc
Supply
CPU + Process I/O + LCD
W/O Field Supply & with
AO Output under range:
5mA
7.0mA
Table 2-11B - ControlWave Express Base Assembly Power Requirements
(for 33MHz CPU - With/Without Ethernet)
COMPONENTS Bulk 12Vdc
Supply
Bulk 24Vdc
Supply
CPU + Process I/O + LCD
(without Ethernet)
W/O Process I/O Bd.:
10mA
W/O Process I/O Bd.:
10mA
CPU + Process I/O + LCD
(with Ethernet)
W/O Process I/O Bd.:
80mA
W/O Process I/O Bd.:
47mA
Note: Current consumptions provided in Tables 2-11A/B are based on typical
application loads. For 3808 power consumption refer to CI-3808.
This summation will accommodate steady state current draw. Table 2-11A and 2-11B
provide detailed steady state power current requirements for each ControlWave Express
configuration. Note: In the case of an external modem/radio, the unit’s manufacturer
provides power consumption specifications.
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