Specifications

Manual Euro-MERiDIAN
Appendix A Page A - 3
SYSTEM COMMUNICATIONS (RS-485) AND KEYPAD PROBLEMS
DEVICE
FAIL xxx
Device on RS-485
communications
bus failing to
communicate
Identify device from numeric code.
Check device addressed correctly to
match programming.
Check connections at device, and
cabling to it.
If above correct, re-boot device,
followed by re-boot End Station
485/COMMS
LOST
Displayed on
Keypad that has
not yet
established
communications
with End Station
Part of routine initialisation
procedure.
If persists, check display at other
keypad(s) to confirm if device failure
at that keypad or complete system
RS-485 failure (temporarily attach
additional keypad direct to End
Station if necessary).
Keypad display
is
BLANK
Keypad address
does not match
any keypad
enabled
Check keypad address, noting that a
keypad at address 00 must be
present to programme system.
Also check "Assigning Keypads"
menu in Engineer mode set up
correctly.
Keypad display
normal, but
KEYS LOCKED
OUT
More than one
device connected
at the same
address
Correct addressing so that no
overlaps. Then power system down
and up again to correctly re-
initialise.
DETECTION FAULTS
iD LINE
SHORT
Fault on iD line Line may be shorted to itself, or to a
supply connection.
Check also for shorts to EARTH
SAB
TAMPER
Tamper fault
detected on
connection from
SAB
Terminal B3 should be at or near 0v.
If not, is SAB Tamper switch closed?
Check Fuse F6 intact, and
connections to SAB.
CASE
TAMPER
Case tamper switch
open
Secure switch closed
SIREN x
TAMPER
STROBE
TAMPER
Monitors for German
specification fault
conditions on relay
plug-on
Euro-44+ and above.
For UK use, Site Option "DIGI-REPLY"
should NOT be set to 'Relay monitor'