User Manual

AS4000 Central Terminal
Installation and Commissioning
GSI 002
605-0000-452
Issue 1.3dr Date 7/02/00
Page 2 of 2
2.2. Hazardous Voltages
There are hazardous voltages present in the modem shelves of this equipment. Do
not touch components or track on the cards while they are in operation.
On AC installations, hazardous voltages exist. Use caution when verifying or working
with AC power. Remove metal jewellery that could come into contact with AC power.
On DC sections, short circuiting the low-voltage, low-impedance circuits can cause
severe arcing that may result in burns or eye damage. Remove rings, watches, etc. to
avoid shorting DC circuits. Do not install power modules in the shelf until the shelf and
rack are properly mounted and secured.
2.3. ESD
Electro-Static Discharge. Many circuits contain devices which are susceptible
to damage from high impedance voltage sources. To avoid such risks always follow anti-
static procedures.