User's Manual

TimeLord Master Clocks
Operating and Installation Instructions
Issue 2.0 A-1
Appendix A - Cable Specifications
TimeLord-> V-488B/C GPS interconnection
The V-488B and V-488C GPS Receiver systems are supplied with
25 metres of four core 7/0.2 (0.22mm
2
) screened cable. The cable
screen should be grounded at the TimeLord end by means of
the EMC rear grounding terminal and on the V-488B GPS receiver
using the screw fitting provided.
For distances of up to 50 metres the length can be extended by
adding an additional length of 7/0.2 cable. For greater
distances, up to a maximum of 200m, 16/0.2 (0.5mm
2
) cable
should be used.
Please note that the 5m cable which links the antenna to the
V-488BGPS Receiver cannot be extended.
TimeLord -> V-484 MSF and DCF radio receiver
interconnection
The V-484 series radio receiver is supplied with a 5m long
unscreened cable as standard.
The cable length may be extended to 10m using unscreened
cable, RS 367-943 - 22 awg or equivalent. In areas of high
electrical noise a screened twisted pair should be used. The
cable screen should be grounded at the TimeLord end only.
Cable length may be extended to 200m using a screened
twisted pair cable, RS 368-340 - 22 awg or equivalent. (UL
style 2092, Alpha 2401)
For screened LSOH (Low Smoke Zero Halogen) applications RS
362-140 (two pairs 7/0.25 - 22 awg) may be used. Equivalent
to UL style 2493.
TimeLord -> Digital Displays w482 code interconnection
The w482 time code system is designed to have considerable
immunity to external electrical interference and screened cable
is only required in areas of high electrical noise.
Normal installations may use standard mains cable. (e.g. twin
1.5mm
2
) The size of the cable depends on the overall cable
length, the number of clocks and their spacing on the cable.
The use of twin 1.5mm
2
cable will be adequate for installations
of up to 50 clocks, calendar clocks or time-zone displays using
up to 1km of cable. For LSOH applications low smoke cable to
IEC332 and BS4066 may be used. RS212-7882 (1.5mm
2
Pirelli
PSX™).
Unscreened data cables should not be run in proximity to
power cables supplying fluorescent lighting or other sources of
electrical noise.
In areas of high electrical noise a screened twisted pair should
be used. The cable screen should be grounded at the TimeLord
end only by means of the rear grounding terminal.
A suitable screened cable is RS 361-361, (twin 16/0.254 - 18
awg) equivalent to Alpha 2421, BICC H8093, UL style 2092
which is adequate for a spur controlling 25 clocks over a 1km
cable run or a greater number of clocks over a shorter distance.
For screened LSOH applications RS 362-140 (two pairs 7/0.25 -
22 awg) may be used. Two conductors may be connected in
parallel to provide a similar performance to 18 awg.
Equivalent to UL style 2493.
For a Cat 5 installation, (24 awg) a single pair can be used to
connect up to 10 400A series clocks or time-zone displays at a
distance of up to 250m. For further distances or greater
numbers of clocks, additional cores should be paired together,
lowering the cable resistance.
If in doubt one should always consider the use of the next
heavier gauge cable as this invariably increases system
integrity at minimal additional system cost and allows for
future system expansion.
All installation work should be performed in accordance with
current Building Regulations and the Sixteenth Edition of the
IEE Wiring Regulations, or equivalent local regulations.
TimeLord -> Analogue Impulse Clock interconnection
Cabling for analogue clock systems is highly dependent on the
number of clocks, power consumption of the clock movements
and distance of cable involved.
Based on the use of 10mA clock movements, each channel of
the TimeLord.IMP master clock could drive 20 clocks (a total of
40 clocks). Alternatively, each channel of the TimeLord.IMP could
drive 25x 8mA clock movements (a total of 50 clocks).
> V-400A/470A interconnection (w482 code)-TimeLord
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mm22.0
2
2.0/7/GWA42/01m052
mm5.0
2
2.0/61/GWA02/05m003
mm5.0
2
2.0/61/GWA02/61m0001
mm0.1
2
2.0/23/GWA71/05m006
mm0.1
2
2.0/23/GWA71/03m0001
mm5.1
2
GWA51/05m0001
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TimeLord -> Analogue Clocks (with hands) connections
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mm5.0
2
GWA02/02m003
mm0.1
2
GWA71/02m056
mm5.1
2
GWA51/02m0001
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