Det-Tronics EA2000HBM Eagle 2000 Heartbeat Monitor - Manual (Page 4)

DET-TRONICS DET-TRONICS DET-TRONICS DET-TRONICS
® ® ® ®
Detector Electronics Corporation
6901 West 110th Street Minneapolis, Minnesota 55438 USA
Tel: 612.941.5665 or 800.765.3473 Fax: 612.829.8750
95-8511
11/99
OPERATION OF EA2400HBM FOR EAGLE 2000
With normal operation indicated on the Gateway display, and the Test leads of the Heart Beat monitor connected
to a given communications module’s terminals A & B (COM1 or COM2) , the COM 1 LED on the Heart Beat
Monitor will light.
Note: If operating power is lost to a field communications module, a pass-through circuit is created for the network
wiring. This ensures network integrity, even if a node is down for service or has been damaged
When a LON fault occurs, the fault isolation circuitry in the affected nodes typically isolates the section of the
network where the fault has occurred. The Gateway will start to communicate from both COM 1 and COM 2 thus
allowing communications to continue from the Gateway to the un-isolated modules.
To isolate a LON fault, connect the test leads of the Heart Best Monitor to the suspect communications module’s
terminals A & B (COM1 or COM2). The LED’s will indicate whether communications are originating from COM 1
or COM 2 of the Main Gateway or the Auxiliary Gateway.
Using the Heart Best Monitor it is then easy to isolate in the field the point in the LON wiring where the
communications changes COM ports and the exact point of communication failure.
NOTE
The Heart Beat monitor is designed for use in NON-HAZARDOUS AREA locations only.
Warning: The monitor will be damaged if the leads are connected to the 24VDC terminals by mistake.
OFF ON
2 1/4”
1”
TOP VIEW
9V
REAR VIEW
(BATTERY COMPARTMENT
COVER REMOVED)
FRONT VIEW
HEART BEAT
MONITOR
Figure 1
5”
TEST JACKS
Status LEDS
COM 1 COM 2 AUX