Electronic Alarms; Remote Monitoring; Alarm Outputs; Drive Options - Meech Hyperion 945IPS Operating Manual

8.2.Electronic alarms

8.2.1.Remote monitoring

Remote monitoring is provided by Pins 2&4 of the 24VDC input port. These signals output
•
approximately 0V/24V and are suitable for direct connection to a PLC input, or to control an
external 24V relay.
• On bar power-up, Pins 2&4 will remain in Hi state for up to 60 seconds before they are used
as outputs.
Note: When a BarMaster remote programmer is connected, alert and fault outputs are
•
temporarily disabled.

8.2.2.Alarm outputs

Alert (Pin 2 White)
•
This pin is used to report when attention may be required for the 945IPS.
• Fault (Pin 4 Black)
This pin is used to report when the bar has a fault, and the output has been shut off (unless
configured as standby input – see section 9.2).

8.2.3.Drive options

Using a BarMaster*, the output can be configured to meet most requirements. As standard, the 945IPS
will be supplied with a factory preset configuration of Output drive = NPN, where Alarm True = Lo.
There are 3 different output drive options which are designed to allow easy integration with most PLC
equipment.
1.Output drive = NPN – 24V is supplied via an internal 2.2kΩ resistor, 0V is supplied directly. **
2.Output drive = PNP – 24V is supplied directly, 0V is supplied via an internal 2.2kΩ resistor. **
3.Output drive = N+P – Both 24V & 0V are supplied directly. ***
The output polarity (Alarm True) can be set to go to Hi (24V) or Lo (0V) when there is an issue.
1. Alarm True = Hi – This means the logic on
both the alarm pins is active high.
Hi
Lo
Normal
Alarm
Alarm True = Hi
* = Please refer to the BarMaster operating manual.
2. Alarm True = Lo – This means the logic on
both the alarm pins is active low.
Hi
Lo
Normal
Alarm True = Lo
14
Alarm