YOKOGAWA WE440, Руководство пользователя

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<2. Installation>
2-6
IM 12Y18A04-01EN 1st Edition : Oct. 04, 2019-00
AC POWER
CONNECTIONS
Figure 2.6 AC power connections
NOTE
When using a UL/CSA approved power cord, loop cord through clip retainer as shown in Figure
2.6 for proper strain relief.
CAUTION
The analyzer is intended for use only with single-phase power.
The analyzer is not equipped with a power switch, therefore a circuit breaking device such as
a circuit breaker should conform to local safety standards and must be fitted before the final
installation. The circuit breaker must be in close proximity to the analyzer and within reach of the
user, and must be marked clearly as the disconnection device for the analyzer.
ALL CONDUCTORS NEED TO HAVE MINIMUM INSULATION RATING OF 75°C.
2.3.1 Analog Outputs Connections
The analyzer is equipped with two isolated analog outputs. The analog outputs can be
programmed to be any one of the following: 0-20 mA or 4-20 mA or reverse acting i.e. 20 – 0
mA or 20 – 4 mA. The range is also programmable and can be scaled according to application
needs.
The outputs have a common isolation from the main system and can drive up to a 900 Ohms
load.
Please refer to Figure 2.7, and Table 2.1, for signal terminal connection detail.
2.3.2 Alarm Connections
The analyzer has five level sensor inputs that accept a dry contact closure signal to indicate the
state of the level sensors. Input 5 is typically assigned for sample. The analyzer is equipped with
four relays that have voltage-free contacts. Two contacts: Normally Open (NO) and Normally
Closed (NC) with a Common (C). The relay contacts are rated for use at a maximum of 240 V
and 2 A.
The terminal connectors accept wire gauge up to 14 AWG.
The terminal strip is located at the bottom of the electronics cabinet (Figure 2.7).
Table 2.2 shows the connector order and terminal designation.
• Make sure no power is supplied to the instrument.