ETC Series Impulse Master Clocks - with
programmable
control
for heating,
lighting
and signaling
bells |
 |
The ETC series of impulse master clocks are designed to control conventional impulse slave clocks using
alternate polarity 24v DC impulses with a one second, half minute or one minute repetition rate
or intelligent slave clocks using high reliability MOBALine® time code -ETC 14 (R) and ETC 24 (R) only.
The ETC master clock also provides 2 or 4 user programmable
switching circuits allowing flexible control
of heating, lighting, signaling bells
and other relay controlled circuits on
a weekly or other periodic date related
basis.
The ETC range is available with cases suitable for wall or DIN rail mounting or as the R version with
a case suitable for freestanding applications or 19" equipment rack mounting.
The user interface allows easy and intuitive entry of programming commands either by the front panel keyboard
or from a PC using the optional 'Switch Editor' software and a serial data link.
| slave clock outputs |
 |
| Model |
ETC 12 (R) |
ETC 14 (R) |
ETC 24 (R) |
| Number of slave clock outputs |
1 |
1 |
2 |
Configurable as 1 second, half minute,
one minute or DCF time code |
yes |
yes |
yes |
| Configurable for MOBALine® timecode output |
no |
yes |
yes |
| Output voltage |
24V |
24V |
24V |
| Maximum impulse output current |
500 mA |
700 mA |
1000mA |
Maximum number of impulse slave clocks
@ 6mA per clock |
80 |
110 |
160 |
| Maximum MOBALine® output current |
none |
500 mA |
700mA |
Maximum number of MOBALine® slave clocks
@ 6mA per clock |
none |
80 |
110 |
| All outputs are overload and short-circuit protected with
automatic adjustment of the slave clock time and recovery from an overload, short circuit or power failure. |
| |
| switching circuits |
|
| Model |
ETC 12 (R) |
ETC 14 (R) |
ETC 24 (R) |
| Number of switching circuits |
2 |
4 |
4 |
| Changeover relay contacts rated at 230V ac 10A |
yes |
yes |
yes |
| Weekly periodic and/or date dependent switching programs |
yes |
yes |
yes |
| Switching commands activated on minute edge |
yes |
yes |
yes |
| Short-time signaling commands programmable for 1-99
seconds |
yes |
yes |
yes |
| Maximum number of programmed commands |
1000 |
1000 |
1000 |
| Front panel keyboard command editing |
yes |
yes |
yes |
Remote command editing using a PC and serial link -
requires optional 'Switch Editor' software at extra cost. |
yes |
yes |
yes |
| |
| timekeeping & synchronisation |
|
| The ETC master clock will operate either
as stand-alone units or synchronised from external
time references. |
| Stand-alone operation |
When used in stand-alone configuration the clock
maintains time keeping from a high stability internal
crystal oscillator. The clock is pre-programmed
for leap-years and can be user programmed for
the required automatic seasonal time-change. |
| Synchronisation options |
- DCF & MSF radio time codes (requires
484mb series radio time code receiver)
|
| |
| environment |
|
| Power supply |
ETC master clocks have an internal PSU and will
operate from a 230v ±10% 50Hz ac supply or from a 22-30V dc source. The power
consumption is:
- ETC 12 (R)
230VAC - ‹0.15A
22-30V DC - ‹ 600mA
- ETC 14 (R)
230VAC - ‹0.25A
22-30V DC - ‹ 1.5mA
- ETC 24 (R)
230VAC - ‹0.4A
22-30V DC - ‹ 2A
|
| Battery backup |
Optional 2.3Ah/24V battery pack |
| Operating temperature |
0-50°C |
| Relative humidity |
0% to 95% non condensing |
| MTBF |
›50,000 hours |
| Accuracy |
- Stand-alone operation: 0.1 sec/day
20-25°C
- Synchronised to MSF or DCF: within
30mS of UTC
|
| EMC |
The ETC master clock, when installed and used in accordance
with our recommendations, complies with the European
Community Electromagnetic Compatibility Directive
89/336/EEC and Low Voltage Directive 73/23/EEC
and conforms to the following standards:
- EN 60950, security, protection call 1
- EN 61000-6-3, emissions
- EN S0121-4, emissions
|
| Dimensions |
Wall and DIN rail version: 202mm wide x 145mm high x 64mm deep
19” rack version: 483mm wide x 88mm high x 80mm deep |
| |
| 
