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Wiring |
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  CDi Main | CDiComm | Controller | CDiNet | CDiBrowser | Outputs | Temp
| DO | pH | Calibration | Pricing
|WIRING: Controller | Temp | pH | DO | BackPlane | RS485 | Output Box | Solenoids | |
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 End-users attempting to do their own wiring should thoroughly read this section and become familiar
with the terminology. The contents of this page are available as a PDF
file in the "Info" section of the site. To quickly calibrate several inputs from the CDi99 keyboard,
click here.Inputs and Outputs - General Inputs to the controller and outputs to solenoids are arranged in a logical manner. If for example, channel 1 is wired for temperature, output 1 will control temperature. We use "70G-OAC" series, opto-isolated relays manufactured by Grayhill. For technical info on these, see this PDF file. These relays provide an LED to display status and have a built-in, 5 Amp fuse. They can switch up to 3 Amps@280V. |
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| CPC series 1 connector, pins, extraction tool | ||||
  All CDi
external connections are implemented through plastic, circular, polarized, CPC series 1 connectors from AMP. Digikey stocks these, and their part numbers are shown in the illustration.The
extraction tool shown is needed if you make a mistake wiring the connector. Insert the tool through the face of
the connector and push the plunger to extract the contact. Some practice may be necessary to achieve skill in doing
this.Two
more tools are required: 1. a soldering iron and 2.
a hand crimping tool for the pins. If a crimping tool is not available, use a pair of needlenose pliers.^top^ |
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| CPC connector example | ||||
 The pin in the picture has been magnified several times to better show detail. To prepare the cable-end
proceed as follows:1. Thread the cable end through the boot and grip. 2. Strip-off about an inch (2.5-3cm) of the cable jacket. 3. Strip-off about 3/16" (5mm) of insulation from the end of each conductor. 4. Crimp and solder the pins. 5. Insert the pins into the plug. 6. Tighten the grip onto the plug. 7. Tighten the boot. ^top^ |
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| Controller wiring - analog channel backplane | ||||
 The analog channel backplane board (piggyback) is in the CDi99 controller case. It performs two functions:
1. Provides a convenient means of mounting different modules, and 2. Contains electronics to supply two different power levels to the modules (the isolators on the DO modules require a 25KHz, 15Vpp power supply. All other modules require a 15V DC supply). To add a DO module  1.
Locate the three-pin module power jumper on the top-left of the module position and move the shorting block to
the location marked "DO" on the board (see picture).2. Use the bottom corner holes to align the module pins with the sockets on the backplane board, and insert. 3. Proceed with calibration and software setup. To add a temperature module Repeat above steps, but move shorting block to the top position. To add a jumper for an external module Jumpers are used when external modules are required as is the case with pH. Contact < > if you need some of these |
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| Controller wiring - inputs | ||||
 1. Logic control and alarm signal outputs to the output box2. Cluster of eight (8) input connectors 3. AC power in connector. 4. RS485 Network |
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| Temperature channel wiring | ||||
 The temperature sensor contains a three-terminal semiconductor device which outputs a current proportional
to temperature. This current is converted to a voltage by the amplifier in the controller. The device ground is
isolated from the sensor case. Use common electrical "twist-on" connectors to make connections in the
junction box. |
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| pH channel wiring | ||||
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| DO channel wiring | ||||
 Oxygen
probes may use a two or three-wire interface. Two wires are used for signal positive and negative, and the third
wire, if present, is the shield.Read the documentation supplied with the DO probe and identify the color of the positive and negative probe terminals. Use common electrical "twist-on" connectors to make connections in the junction box. |
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| RS485 - Network wiring | ||||
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| Output box wiring | ||||
Each
output box is pre-assembled. User access to the inside of the box is not required, except
perhaps to change the integral fuse in the relay .  Internal wiring is identical for both 120V and 220V installations.
Identify and familiarize yourself with the following connectors:1. Logic control and alarm inputs. This connector brings the active-high, current-limited, 5V control signals from the controller 2. Cluster of eight (8) output connectors to solenoid valves. Pin 3 (Load 1) is the switched line from the solid-state relay. Pin 2 (Load 2) is not switched, and is the Neutral in 120V systems or Load 2 in 220V systems. 3. AC power in connector. 4. Common alarm out. This connector provides access to the internal, common alarm electromagnetic relay. |
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| Solenoids | ||||
| Since it is up to the user to supply the control solenoids, exact pinouts of solenoid wiring cannot be given here. Solenoid voltage rating should match that of the AC mains rating. Namely: in 120V systems, use 120V solenoids, in 220V systems, use 220V solenoids. The GrayHill "G5" relays included in the output relay box can switch up to 280V AC @ 3 Amps. | ||||
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| Controller to Outputs Harness | ||||
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| Common Alarm | ||||
| The common alarm output connector provides an interface for the three switch circuits (Normally Open, Normally Closed and Common).See outputs above. | ||||
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Connections for temperature
