Omron G3ZA - MANUAL 2 User Manual page 31

How To Use the Terminals
Current Transformer
Inputs (4-channel Models
Only, Terminals 19 to 24)
19 20 21 22 23 24
13 14 15 16 17 18
READY
SD/RD
OCC
ERROR
7 8 9 11
1 2 4
Connection Examples
Example Connection with
the PLC
14
Controllers without a Current Transformer Input Circuit (G3ZA-8A@03-
FLK-UTU)
• The trigger outputs for channels 5 to 8 are output on terminals 19 to 24.
CH5
SSR
CH6
SSR
19 20 21
−
+ +
12 VDC,
21 mA
12 VDC,
21 mA
Controllers with Built-in Current Transformer Circuits (G3ZA-4H@03-
FLK-UTU)
• Connect terminals 19 to 24 to the current transformers (no polarity) to
detect heater burnouts, heater overcurrents, and SSR short-circuits.
CH1
CT
CH2
CT
19 20 21
There are four current transformer inputs that can be used.
Use the E54-CT1, the E54-CT3, or the G3ZA-CT150L from OMRON as
6
the current transformer.
Alarm output
Power Controller
power supply
RS-232C/485
CS/CJ-series PLC
CH7
SSR
CH8
SSR
22 23 24
−
+ +
12 VDC,
21 mA
12 VDC,
21 mA
CH3
CT
CH4
CT
22 23 24
20 mm min. (See note.)
Load power supply
(for zero-cross detection)
Note When installing next to an SSR,
provide sufficient spacing.
Example: When a current of 10 A (100%
of the control capacity) flows in
a G3PA-210B-VD SSR, a mini-
mum spacing of 20 mm is
required between the G3ZA
Controller and the SSR.
Section 2-2
Heater
SSR