HCMB thermistor cable (21) On an iH600/iH1000 system, this is used to connect the
output of the thermistor in the HCMB pump to the
Electrics Box.
HCMB electrical supply cable (22) On an iH600/iH1000 system, this is used to connect the
electrical supply from the Electrics Box to the HCMB
pump.
1.10.3 Electronics module
This Module communicates with the Gas Module, the Pump Display Terminal and the
optional Interface Module accessories. The following sensors are connected to the Electronics
Module:
•
HCDP pump-body and pump-motor water manifold temperature sensors
•
HCMB pump temperature sensor (iH600/iH1000 systems only)
•
Exhaust temperature sensor (if fitted)
•
Water flow-switch.
The Module has a microprocessor which:
•
Monitors the status of the system.
•
Sends warning and alarm messages (see Section 1.12.2) to other Modules connected to the iH
system.
•
Monitors the control inputs (from the Pump Display Terminal or the Interface Module
accessory) and switches the pumps on and off as requested.
•
Shuts down the iH system if a sensor reading is outside the specified alarm range: see
Section 1.12.2.
The Module also communicates with and controls the operation of the Gas Module.
Internal clocks and counters in the module measure the operating time of the iH system and
keep count of the number of iH system switch-on/switch-off and process cycles.
1.10.4 Gas module
The Gas Module communicates with and is controlled by the Electronics Module. The
operation of the nitrogen purge supply solenoid-valves in the Gas Module is described in
Section 1.6.
1-16 iH Dry Pumping Systems
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