Protective earth (ground) stud (11) If required, use this to make additional protective earth
(ground) connections: refer to Section 3.16.3.
Exhaust Gas Management
interface (12)
If required, use this connector to connect the iH system
to a BOC 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 iH Interface Module (if fitted).
Refer to detail E. Fuses inside the Electrics Box (16 to 21) protect the internal circuits of the
Electrics Box. Note that you cannot change these fuses; a BOC Edwards service engineer must
change these fuses.
Refer to detail C. The rear panel of the iH system has the following connections:
Active gauge connector (5) This connector is only available if you have fitted an
Active Gauge Connection Kit (see Section 8.4.3). Use
this to connect the active gauge to the iH system.
1-12 iH Dry Pumping Systems
Figure 1-3 - Schematic diagram of the iH80/iH600 electrical systems: key
1. Electrics Box
2. Gas Module
3. Electronics Module
3A. Control SMA
4. Pump Display Terminal
5. External electrical supply
6. Electrical supply connector
7. Protective earth (ground) stud
8. Exhaust Gas Management interface
9. Tool Interface Module connector
10. Pump Display Module *
11. iH Tool Interface Module fuse holder
12. Emergency stop fuse holder
13. HCDP electrical supply
14. HCDP motor terminal-box
15. HCDP motor thermistor cable
16. HCMB electrical supply ✝
17. HCMB motor terminal-box ✝
18. HCMB motor thermistor cable ✝
19. RF earth (ground) stud
20. Cooling-fan connector
21. iTIM
22. iTIM connector
23. Pump shut-down thermistor
24. Not used
* Optional accessory
25. Emergency stop switch
26. RJ12 connector for PDT
27. Not used
28. HCMB temperature sensor ✝
29. Not used
30. Exhaust temperature sensor *
31. HCDP pump-body temperature sensor
32. Control PL3 connector
33. Gas Module PL4 connector
34. Water flow-switch
35. Not used
36. Dashboard PL1 connector
37. Sensors PL2 connector
38. Not used
39. Solenoid-valves (6 off)
40. Pressure transducers (2 off)
41. Mass flow transducer
42. Dashboard LEDs
43. Not used
44. 4-way XLR connector for PDM
45. Active Gauge connector *
46. Lower rear bulkhead panel
47. d.c. electrical supply fuse holder
48. Active gauge cable connector
49. Sensor connector
✝ iH600 only
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