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Connecting to the Z-2400-A2I & Z-2400-A2O Digital Outputs.
The two digital outputs can be used for pulse and frequency into a counter or totaliser. 30Vdc, 1A max.
Z-2400-A2I / Z-2400-A2O
DI 4
7
DI 3
8
DI 2
9
DI 1
10
GND
11
SINK/SRC
12
3V
13
DO 4
14
DO 3
15
Connecting Pulse, Frequency & On/Off State Signals to the Z-2400-A2I & Z-2400-A2O Digital
Inputs.
The four digital inputs from either Z-2400-A2I & Z-2400-A2O can be used for pulse and frequency outputs from slower
sensor types e.g., Rain Gauge and also for on/off state inputs.
Warning: The digital inputs are not isolated from the node power supply. Therefore, if you are using an external
power supply on the digital inputs, it must be a separate isolated instrument quality power supply.
Z-2400-A2I / Z-2400-A2O
DI 4
7
DI 3
8
DI 2
9
DI 1
10
GND
11
SINK/SRC
12
3V
13
DO 4
14
DO 3
15
Instrument Quality
24Vdc Power Supply
Note 1. Always link the 'SINK/SRC' & 'GND' terminals.
PSW-10-F
Note 2. All cables must be screened and the screens
earthed at one end only. Refer to 'Z-2400-A2 Wiring
and Installation'.
Pulse / Frequency
Pulse / Frequency
Reed Switch or
Relay Contact
1.4~30Vdc
Note 1. Inputs can be either:
Note 2. The Ground of an external power supply must be connected to the
GND (Terminal 11) of the digital inputs.
Note 3. Each digital input is pulled up to 3V through a 22K resistor.
Note 4. Always link the 'SINK/SRC' & 'GND' terminals.
Note 5. All cables must be screened and the screens earthed at one end
only. Refer to 'Z-2400-A2 Wiring and Installation'.
17
Meter
Meter
Open Collector
PNP
NPN
Digital Output
State - i.e. ON / OFF or
Frequency - 0~1Hz.
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