Wiring For Ground Terminals; Wiring For Contact Output; Cable Specifications; Wiring Procedure - YOKOGAWA ZR402G User Manual

5.3.2

Wiring for Ground Terminals

The ground wiring of the analyzer should be connected to either the ground terminal of the
equipment case or the terminal inside of the equipment. Proceed as follows:
(1) Keep the ground resistance of 100Ω or less (JIS Class D grounding).
(2) When connecting the ground wiring to the ground terminal of the equipment case, be sure
that the lock washer is in contact with the case surface (see Figure 5.5.).
(3) Ensure that the jumper plate is connected between the G terminal and the FG terminal of
the equipment.
(4) The size of external ground screw thread is M4. Each cable should be terminated
corresponding crimp-on terminals.
5.4

Wiring for Contact Output

The equipment can output a maximum of two contact signals. These contact outputs can be used
for different applications such as a low alarm or high alarm.
Do the contact output wiring according to the following requirements.
Analyzer
DO-1
DO-1
DO-2
DO-2
Figure 5.6
5.4.1

Cable Specifications

The number of cores varies depending on the number of contacts used.
5.4.2

Wiring Procedure

(1) M4 screws are used for the terminals. Use crimp-on terminals appropriate for M4 terminal
screws for cable connections.
(2) The contact output relays are rated 30 V DC 3A, 250 V AC 3A. Connect a load (e.g. pilot
lamp and annunciator) within these limits.
5.5

Wiring for Contact Input

The converter can execute specified function when receiving contact signals.
To use these contact signals, proceed wiring as follows:
Converter
DI-1
DI-2
DI-C
Figure 5.7
Contact Output Wiring
Terminal box
Contact Input Wiring
Terminal box
Annunciator or the like
Contact input 1
Contact input 2
F5.7E.ai
<5. Wiring>
#1 Output
#2 Output
F5.6E.ai
IM 11M12A01-04E 11th Edition : Jul. 19, 2017-00
5-5