PART TWO - INSTALLATION
SECTION 3 - ELECTRICAL CONNECTIONS
Model C53 Conductivity Analyzer (universal-mount 1/2 DIN)
Rev. 5-1000
28
3.3 Relay Outputs
The analyzer may be equipped with up to four electrome-
chanical relays. For relay setup details, see PART THREE,
Section 4.6.
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).
Up to four sets of SPDT relay outputs (Relays A, B, C, and
D) are provided at Terminals 1 through 12 on TB2.
The re-
lay outputs are not powered.
The line power used to
power the analyzer may also be used to power con-
trol/alarm devices with these relay contacts. Refer to Figure
2-7 for a general wiring 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.
WARNING:
MAKE SURE LINE POWER IS NOT PRESENT WHILE
CONNECTING WIRES TO TB2 RELAY TERMINALS.
FIGURE 2-7
Connecting Control/Alarm Device(s) To Electromechanical Relay(s)
