EAP 110 ANNUNCIATOR
2.2.2. Wiring from the engine control panel to the annunciator should be two -
#14 AWG (2.5mm
2
) wires.
2.2.3. Under noisy environments (i.e. gas engines with high voltage ignitions,
etc.), wiring from battery should be a twisted pair of #14 AWG (2.5mm
2
)
wires.
2.3.
EXTERNAL CONTACT INPUTS
All external contact inputs to the EAP 110 are optically isolated and filtered for
protection from noise spikes and transients. Wiring should conform to the
following guidelines to avoid possible Annunciator malfunction and/or damage
2.3.1. External contact wires (2 - #14 AWG (2.5mm
2
) should be run in a
separate conduit.
2.3.2. Avoid wiring near AC power cables to prevent pick-up of induced
voltages.
2.3.3. An interposing relay may be required if field wiring distance is excessively
long (i.e. greater than 100 feet (30m) and/or if a remote contact has a
resistance of greater than 5.0 ohms.
2.3.4. The external contacts (if used) must be voltage free (i.e. dry contact).
The use of a “powered” contact will damage the Annunciator.
2.4.
REMOTE COMMUNICATION WIRING
All interconnecting wiring to/from the EAP 110 Annunciator communication port
shall utilize #22 AWG (min.) 8 conductor, twisted, shielded cable with RJ45
connectors. The drain (shield) wire must be connected at the Engine Controller
end only. Refer to connection diagram in
Section 7
for further information.
Communication cable from the Annunciators’ com port must be suitably routed to
protect it from sources of electrical interference. Guidelines for protection against
possible electrical interference are as follows:
•
Use high quality, 8 conductor shielded cable only with drain wire
grounded at the Engine Controller end only.
•
Route the communication cable at least 3 M (10”) away from sources of
electrical noise such as variable speed motor drives, high voltage power
conductors, UPS systems, transformers, rectifiers etc.
•
Use separate, dedicated conduit runs for all communication cables. Do
not tightly bundle communication cables together in the conduit. Conduit
PM058 Rev 2 06/01/18
Thomson Technology
7
