Relay And Open Collector Wiring - Signet 9900 Operating Instructions Manual

Relay and Open Collector Wiring

Open Collector wiring
NPN Style Wiring
Pull-Up Resistor
PWR +
PWR –
Loop +
Loop –
OC – OC+
If PLC needs 0 logic input when relay is
not energized, set NORMAL to CLOSED
in the RELAY menu when using the Open
Collector (R1) with NPN style wiring.
• The 9900 Open Collector (R1) output provides high-speed switching capability.
Signal frequencies can reach 400 pulses per minute.
• The 9900 Open Collector (R1) output connection is dependent upon the type of circuit being controlled by the output.
• Most indicating instruments or control system inputs require a signal voltage of 0 to 5 V (TTL or CMOS logic levels) or 0 to 24 V.
Therefore, the 9900 Open Collector output circuits must be equipped with a pull-up or pull-down resistor (not supplied), and a
quality regulated 5 to 24 V (depending on the application) power supply (not supplied) is recommended to function properly.
Relay Module wiring
The alarm is OFF during normal operation,
and will go ON when relay energizes
according to 9900 Relay settings.
The valve is ON during normal operation,
and will go OFF when relay energizes
according to 9900 Relay settings.
NO = normally open (closes when energized)
NC = normally closed (opens when energized)
18 9900 Transmitter
PNP Style Wiring
Power
Supply
Gnd
Input
PLC
Gnd
with NORMAL set to OPEN.
Loop +
OC+
Pull-Down Resistor
Alarm
PWR +
PWR –
Loop +
Loop –
OC – OC+
NO
NC
C
NO
NC
C
AC or DC
power
Flow
Input
PLC
Gnd
Power
Supply
Gnd
V+
Power
Supply
Gnd
ALARM!
AC or DC
power
Valve