Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 82)

<5. Wiring>
5-10
IM 11M12A01-02E 8th Edition : Jan.13,2012-00
5.5.2 Grounding Wiring
The ground wiring of the detector should be connected to the ground terminal of the detector
case. The ground wiring of the converter should be connected to either the ground terminal of the
converter case or the protective ground terminal in the equipment.
The grounding terminals of the detector and the converter are of size M4. Proceed as follows:
(1) Keep ground resistance to 100 Ω or less (equivalent JIS D style (Class 3)).
(2) When the ambient temperature of the wiring installation is 80 to 150
°C for the wiring of the
detector, use wiring material with sufficient heat resistance.
(3) When connecting the ground wiring to the ground terminal of the converter case, be sure
that the lock washer is in contact with the case surface (see Figure 5.9.).
(4) Ensure that the jumper plate is connected between the G terminal and the protective ground
terminal of the converter.
5.6 Contact Output Wiring
Contact outputs 1 to 3 can be freely assigned to “low limit alarm”, “high limit alarm”, etc. user
selectable, but the assignment of contact output 4 is fixed (“error output”). And the action (contact
closed on error output) also cannot be changed.
When using these contact outputs, install the wiring as follows:
#1 Output
#2 Output
#3 Output
#4 Output
DO-1
DO-1
DO-2
DO-2
DO-3
DO-3
Terminal box Annunciator or the like
F5-11E.ai
ZR402G
Converter
DO-4
DO-4
Figure 5.10 Contact output wiring
5.6.1 Cable Specifications
Number of wire in cable varies depending on the number of contact used.
5.6.2 Wiring Procedure
(1) M4 screws are used for the terminals of the converter. Each cable should be terminated
corresponding to crimp-on terminals.
(2) The capacities of the contact output relay are 30 V DC 3 A, 250 V AC 3 A. Connect a load
(e.g. pilot lamp and annunciator) within these limits.