Edwards EXC 100E, Instruction Manual

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Introduction
D396-20-880 Issue H
1.4 Logic interface
1.4.1 Introduction
The rear panel of the Controller has a 15-way logic interface connector ( Figure 1 , item 4) which you can use to
connect the Controller to your own equipment.
Signals on the logic interface are of four types:
Refer to Table 10 and to Figure 4 for detailed information about the logic interface pins and their uses. A general
description of the logic interface connections follows.
1.4.2 Electrical supplies
Two nominal 24 V supplies are provided, as described below:
1.4.3 Control inputs
You can use these inputs to control the operation of the EXT pump. The input signals are switch-type signals; you link
(close) two pins on the logic interface when you want to set the required signal and you do not link (open) the pins
when you do not want to set the signal. The input signals are as follows:

Electrical supplies These are electrical supplies for optional accessories connected to your pump,
such as the vent-valve and the air-cooler.

Control inputs These are switch-type input signals which are used to control the operation of the
EXT pump.

Status outputs These output signals identify the status of the pump and the Controller.

Analogue output The Controller can be configured to provide a speed output or a power output.
This output gives an indication of the EXT pump speed or power consumption.

Vent-valve supply
This electrical supply is provided to operate a vent-valve fitted to your EXT pump or vacuum system. The
Controller automatically opens the valve when the speed of the pump falls to below 50% of full rotational
speed. You can also configure the Controller to operate the valve in other specific conditions: refer to
Sections
1.5 and 3.2 .

Air-cooler supply
This electrical supply is provided to operate an ACX air-cooler fitted to your EXT pump. The electrical supply
is on whenever the Controller is on. Alternatively, if your pump is water-cooled, you can use this supply to
operate a solenoid-valve to control the flow of water through the water-cooler.
Start/Stop Use the Start/Stop input to Start and Stop the EXT pump. To Start the pump, you must close the
Start/Stop input. To Stop the pump, you must open the input (refer to Sections
4.1 and 4.5 ).
Standby Close the Standby input to select pump Standby (refer to Section 4.2 ).