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7.5 Connecting signal wiring to associated
equipment.
The TDSi EXcel
must be connected to other equipment forming part of an overall control system using
signal wiring connections made with screened cable with the screen securely
connected to an earth point at the controlled equipment end and at earth points within
the EXcel
equipment. Where individual remote equipment is locally earthed it is
4
permissible to disconnect the cable screen earth connection at one end of the cable.
7.6 Internal fuse rating
The low voltage DC Regulator PCB in EX series is fitted with fuse protection marked FUSE.
In case of failure FUSE should be replaced with a 3.15A (T) 20mm Fuse.
The Fused Output Module PCB is fitted with fuse protection marked F1 – F4. In case of
failure F1 should be replaced with a 2A (T) 20mm Fuse, F2 – 5 should be replaced with a
1A (F) quick blow 20mm fuse.
7.7 Lithium battery
The Lithium battery is only fitted to the EXcel
needs to be connected. The battery will support EXcel
years in normal environmental conditions.
The clock chip mounted on EXcel 4 board has it only internal battery, which will retain
memory to the clock chip for a maximum of 10 years under normal operating conditions
Access Control Units with an internal AC PSU mains power supply fitted
4
EXcel4 Controller
board. For this to be operational jumper J4
4
memory for a maximum of 10
4
Page 49
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