PART TWO - INSTALLATION
SECTION 3 - ELECTRICAL CONNECTIONS
Rev. 1-201
Model F53 Flow Monitor/Totalizer (universal-mount 1/2 DIN)
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3.3 Relay Outputs
Wiring Tip!
Use high quality, shielded instrumentation
cable for connecting the analog outputs. To protect the
output signals from EMI/RFI, connect cable shields to
the grounding strip at bottom of case (5 open holes).
Each 0/4-20 mA output can drive a load of up to 600 ohms.
•
Output 1:
Connect the load to Terminals 2 and 3 on TB1,
matching polarity as indicated.
•
Output 2:
Connect the load to Terminals 4 and 5 on TB1,
matching polarity as indicated.
NOTE:
When using the HART communication option, a
digital signal is encoded onto the 4-20 mA analog
Output 1 signal. In a HART SINGLE MODE wiring
configuration, Output 1 remains available for normal
use. However, in a HART MULTI-DROP wiring con-
figuration, Output 1 becomes dedicated to that
function and cannot be used. See PART THREE,
Section 8 for more HART communication information.
The analyzer is equipped with four electromechanical relays.
For relay setup details, see PART THREE, Section 4.5.
CAUTION:
DO NOT EXCEED THE CONTACT RATING FOR
EACH RELAY (5A 115/230 VAC). WHEN SWITCHING
LARGER CURRENTS, USE AN AUXILIARY RELAY
SWITCHED BY THE ANALYZER RELAY TO EXTEND
ANALYZER RELAY LIFE. WHEN USING RELAY
OUTPUTS, MAKE SURE THAT LINE POWER WIRING
CAN ADEQUATELY CONDUCT THE CURRENT
DRAW OF THE SWITCHED LOAD(S).
Four sets of SPDT relay outputs (Relays A, B, C, and D) are
provided at Terminals 1 through 12 on TB2.
The relay out-
puts are not powered.
The line power used to power the
analyzer may also be used to power control/alarm devices
with these relay contacts. See Figure 2-5 for a general wir-
ing arrangement. Always check control wiring to insure that
line power will not be shorted by the relay switching action,
and that wiring conforms to local codes.
