Contrec 515 BR03, Руководство по эксплуатации

Страница: 24 / 110

Installation & Maintenance
14 515 BR03 - 15 August 2021
Logic Input Connection
These inputs are designed to be connected to CMOS, TTL, open collector
signals or a voltage free contact switch. A minimum activation time of
300ms is required to guarantee reading of an input.
It is possible to read the status of all the logic inputs via a Modbus register
even if they are not used for a control purpose in the application.
A remote push-button key can be connected to the Logic Inputs as shown
below.
Logic Input Control on page 35 describes the function of the
inputs.
Figure 6 Logic Inputs Connection Diagram
Outputs
The advanced option for the instrument provides two opto-isolated output
ports. Either or both can be used for 4-20 mA or pulse outputs.
CAUTION
Due to the dual-purpose nature of the outputs, take care not to
set the output as an open collector pulse type signal when
connected to a 4-20 mA loop circuit.
4-20 mA Output Connection
Figure 7 shows the connections for a 4-20 mA output. Output channel 1 uses
terminals 27 (+) and 28 (-), output channel 2 uses terminals 29 (+) and 30 (-).
Maximum Load Resistance = (Supply-9) / 0.02 ohms
C-
23
Logic Input
22
24
25
26
1+
2+
3+
4+
Signal Ground