MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
38
7.1.6.
Remote Alarm Monitoring
The TEC 3000 is equipped with a global remote alarm relay and four specific discrete dry
contacts that allow remote monitoring of alarm conditions. Once activated, these latching
contacts will retain their alarm state until the alarm condition is corrected and cleared. Although
Chart MVE does not provide remote monitoring or programmable logic controller (PLC)
systems, these devices can be easily connected to the TEC 3000. For example, it is possible to
setup a TEC 3000 so that if a Low Level Alarm is triggered, the remote monitoring system will
automatically send an email or place a call to alert the necessary individuals of the freezer’s
status. For proper discrete contact function, ensure the negative (low voltage) terminal of the
remote monitoring system is connected to the COMMON discrete contact terminal and the
positive (high voltage) terminal is connected to the respective discrete alarm terminal. Wires
can be inserted and removed from the terminals by placing a small flathead screwdriver into the
slot above the contact and prying down the latch until the clamp connector opens. Remove the
flathead screwdriver to close the clamp connector. For alarm contact test procedures, refer to
the Remote Alarm Tests section. Below are the remote alarm contact specifications and a
typical remote monitoring setup schematic.
If an alarm condition has been corrected, but it
continues to register through the global or discrete contacts, remove the contacts and cycle the
power on the controller. This will clear the alarm if it has latched in the system.
Figure 7:
TEC 3000 remote alarm contacts
Table 2:
TEC 3000 remote alarm contact specifications
Discrete Contacts
Global Remote
Normally Open
Normally Open or Normally Closed
Open Collector
Dry Contact Relay
Latching
Latching
Polarity Sensitive
Non-Polarity Sensitive
24 VDC at 100 mA max
230 VAC at 1 A max
Figure 8:
Typical remote alarm monitoring setup schematic. Temp A High monitoring shown
Содержание MVE 1842P-150
Страница 1: ...Chart Cryogenic Freezers with MVE TEC3000 Controllers Operating and Maintenance Manual ...
Страница 24: ...MVE Biological Systems TEC 3000 Operating and Maintenance Freezer Manual 13289499 Rev H 22 11 10 ...
Страница 106: ...MVE Biological Systems TEC 3000 Operating and Maintenance Freezer Manual 13289499 Rev H 105 8 4 Add On Menus ...
Страница 109: ...MVE Biological Systems TEC 3000 Operating and Maintenance Freezer Manual 13289499 Rev H 108 8 7 Liquid Level Menus ...
Страница 111: ...MVE Biological Systems TEC 3000 Operating and Maintenance Freezer Manual 13289499 Rev H 110 8 9 Advanced Settings Menus ...
Страница 112: ...MVE Biological Systems TEC 3000 Operating and Maintenance Freezer Manual 13289499 Rev H 111 8 10 Password Menus ...