Section 2: System Operation - scope Digilink MK3 Installation & User Manual

Confirmation of power connection is by way of the red PWR indicator on the base of the chassis.
Confirmation of transmit is by way of the momentary green TX indicator on the base of the chassis.
When any zone is changed to it's active state, the pre-programmed data/message for that zone will
be transmitted to the receiver(s). Repeat transmissions can be programmed for added security, these
will be detailed on the Configuration Data sheets provided with your system.
Where the system has been configured for voltage input:
volts present = an open input, no volts = a closed input.
The siren output is an "open collector" type switching to ground. It may be used to switch up to 24V
dc @ 1A max. Note that if it is used to switch a relay, a suitable diode must be connected across the
relay coil (stripe towards positive side of coil).
Problems and Fault Finding.
1 Check that the input cables are connected to the active zones. For a 5 zone unit,
these are the lowermost terminal blocks on the main PCB (see Diagram 2).
2 Check the Configuration Data sheet supplied with the system to confirm the active
(trigger) state of each input i.e. Normally Open, Normally Closed or Change of
State.
3 If your system has been configured for Dry Contact operation, ensure that no
voltage is present on the input cables. Also check that cable runs are not excessive
(preferably less than 10 metres) and are not in close proximity to other mains or
telecoms cabling.
4 Check that the receivers are at least 3 metres from the transmitter and aerial.
Under certain conditions it is possible to flood receivers and corrupt the data
received.
5 Check that any portable receivers used with the system have the battery installed
with the correct polarity and are correctly powered up.
6 Check that the red power indicator on the base of the chassis is lit. If not, isolate the
power and check the mains plug fuse.
7 Check that the green TX indicator lights for the duration of the transmission. If not,
go back to the cabling and re-check the terminal connections.
8 Check that the aerial is correctly installed.
DLINKMK3ACUSA
Digilink MK3, USA Mains Version

Section 2: System Operation

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