Ebtron Advantage IV Series Operation & Maintenance Manual page 177

EB-FlowII EF-A2000-U WIRING GUIDE
ACT LED
C1 C2
A1
GND
A2
A
TRANSMITTER CONNECTIONS
Analog Out Contact
Power
(non-isolated) Closure
24V GND A1 A2 GND A B
INSTRUCTIONS TO INSTALLER:
1. Mount the transmitter in a location where the probe cable can reach the receptacles of the
2. Connect the sensor probes to the transmitter. Although probes are "plug and play" and connections
LED PWR
3. Select a 24 VAC transformer that provides 22.8 to 26.4 VAC during operation. Size the transformer
24V
GND
B
4. EB-FLowII transmitters do not have a power switch. "Live" wiring to the power terminals is not
5. If analog output signals are used, continue to step 6, otherwise skip to step 7.
Connector
6. Connect each analog output signal required to the host B.A.S. using shielded twisted-pair wire.
C1 C2
7. If the contact closure relay is used continue to step 8, otherwise skip to step 11.
8. If the contact closure realy is used to energize an external alarm device, such as a relay, continue to
9. Connect the "hot" wire of an external alarm device in series with relay terminals A and B. The contact
10. Connect the positive (anode) side of the LED to relay output A and the negative (cathode) side to
11. Refer to the EF-A2000-U Startup Guide prior to energizing power to the transformer.
transmitter. Provide a weatherproof enclosure (by others) and mount away from direct sunlight when
outdoor mounting is required.
to specific receptacles are not required, it is recommended that probes are connected Probe 1 to
receptacle C1 and Probe 2, if provided, to receptacle C2. Probe numbers are indicated on each
cable hang tag.
Cables have an FEP plenum rated jacket that are UV tolerant and suitable for operation over the
entire operating temperature range of the device.
Sensor probe plugs are keyed and NOT twist-lock. Align the key and push the plug onto the
transmitter receptacle. Twisting may damage the connector pins.
for 8.5 V-A for each measurement location.
The labeling "24V" is equivalent to "L1" and "GND" is equivalent to "L2" in many AC wiring diagrams.
Do not connect "GND" to earth ground.
Most B.A.S. systems require devices with a "floating" signal common. Do not connect the secondary
output of the power transformer to earth ground. Failure to follow this requirement will result in
ground loops and may cause damage to the transmitter or host B.A.S.
Multiple transmitters wired to a single transformer must be wired "in-phase" (24V to 24V and GND to
GND).
recommended. Do not energize the transformer until power and all signal connections have been
made to the transmitter.
"Live" wiring may damage the transmitter and void warranty. Do not energize the transformer until
power and all signal connections have been made to the transmitter.
Properly terminate the shield (typically at the B.A.S.).
If twisted pair wire and/or shielded cable is not used, extraneous electrical noise can be picked up
between the transmitter and host control panel.
step 9. If the contact closure relay is used to drive an LED, skip to step 10.
closure relay is normally open (N.O.) but can be setup for normally closed (N.C.) operation. Refer
the the Operations and Maintenance Manual for more information. Skip to step 11.
The alarm device must not exceed 3 amps @ 24 VAC or 30 VDC.
ground (PCB GND terminal preferred). Place the shunt jumper across the LED PWR posts (j26).
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