© Edwards Limited 2009. All rights reserved.
Page 7
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INTRODUCTION
A533-23-880 Issue C
1.9
Electrical system
Refer to Figure 3, which shows a schematic diagram of the electrical and control system of the iF1800 system.
1.9.1
Introduction
The iF system has an Electrics Box (1), Control Module (3), a Gas Module (2) and a Pump Display Terminal (4). The
iF1800 system has an inverter (50). Optionally, your iF system may have an iF Interface Module, an iF Communications
Module, and other accessories, such as an exhaust temperature sensor (30) and a Pump Display Module (10).
All of these Modules communicate through a serial data network. Each Module on the network has a microprocessor,
which controls the network communications and also contains the default setpoints for the sensors in or connected
to the Modules (refer to Section 2).
1.9.2
Electrics box
Refer to Figure 3. The external electrical supply (5) is connected to the electrical supply connector (6) on the
Electrics Box (1). The Electrics Box provides the electrical supplies to the other Modules in the iF system. The
electrical supply to the FDP pump is provided by the Electrics box on the iF1800 system. The inverter (50) provides
the electrical supply to the HMB1800 pump in an iF1800 system.
The Electrics Box has contactors for the FDP pump and the HMB pump (on an iF1800 system), pump power and current
consumption sensors and short-circuit protection. The Electrics Box has a transformer and fuses for the 24 V control
circuits, it also has fuses for the following supplies: iF Tool Interface Module (11) and d.c. electrical supply (47).
Three thermal-type, self-resetting fuses in the Electrics Box protect the d.c. electrical supplies to the network.
Refer to Figure 4 detail C. The rear panel of the Electrics Box has the following lamp and connections:
Power on lamp (7): This lamp is on when the electrical supply to the Electrics Box is on.
Tool Interface Module connector (8): Use this to connect an iF Tool Interface Module to the iF system (refer to Section
8.5.2); or to connect an external emergency stop circuit to the iF system (refer to Section 3.14).
LON Interface Connector (9): Use this to connect the iF system to a network.
Electrical supply connector (10): Use this to connect your external electrical supply to the iF system: refer to Section
3.15.2.
Protective earth (ground) stud (11): If required, use this to make additional protective earth (ground) connections:
refer to Section 3.15.2.
Exhaust Gas Management interface (12): If required, use this connector to connect the iF system to a Edwards
Exhaust Gas Management.
Fuse holder F7 (13): This fuse protects the d.c. electrical supply.
Fuse holder F9 (14): This fuse protects the emergency stop circuit.
Fuse holder F8 (15): This fuse protects the iF Interface Module (if fitted).
Refer to detail D. Fuses inside the Electrics Box (16 to 21) protect the internal circuits of the Electrics Box. Note that
you cannot change these fuses; a Edwards service engineer must change these fuses.
Refer to detail B. The rear panel of the iF system has the following connections:
Active gauge connector (5): This connector is only available if you have fitted an Active Gauge Connection Kit (refer
to Section 8.4.2). Use this to connect the active gauge to the iF system.
RF earth (ground) stud (6): If required, use this to make additional RF earth (ground) connections: refer to Section
3.15.3.
Refer to Figure 5, detail A. The bottom panel of the Electrics Box has the following cables and connectors.
