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1. Vent Thermocouple- The Vent Thermocouple Plugs in here.
2. Lid Temp. A Thermocouple- The Lid Temp A Thermocouple Plugs in here. (see page 11)
3. Lid Temp B Thermocouple- The Lid Temp B Thermocouple Plugs in here. (see page 11)
4. Ethernet Port- The Ethernet Cord for future expansion.
5. RS-485 IN- Used for RS-485 Cryomonitor communication between controllers.
6. RS-485 OUT - Used for RS-485 Cryomonitor communication between controllers.
7. Lid Switch - Used to indicate “Lid Open” condition.
8. Sensor Port - Used to sense level in vessel.
9. Fill/Vent In Progress - Outputs 24V DC whenever lling or venting. (see page 11)
10. Fill Solenoid Valve Outlet - The ll solenoid valve plugs in here. (Specications: Rating:
100VAC 2A, Insulation Resistance: 300Ω minimum @500VDC, Dielectric Strength:
1,000VAC for 1 minute, Contact Resistance: 20mΩ maximum, Withstand Voltage:
1,000VAC for 1 minute, Insertion Force: 4Kg max, Withdrawal Force: 1-3.5Kg).
11. Vent Solenoid Valve Outlet - The vent solenoid valve plugs in here. (see specications
in #10)
12. Global Remote Alarm - Dry contact that switches status when any alarm occurs. (see
page 12) All Global Alarm connections are contact relays with max output of 24VDC@2A
13. 2 Amp Fuse - VAC 2 amp buss fuse; 220 volts slow-blow. (T2A-250V)
14. 24 V Power Supply - This is the main power supply cord to the unit, be sure to check for
proper voltage - See voltage requirements on the controller.
15. Overow Sensor (Optional)- If installed, used to sense an overow condition in the
storage space of a vessel. (see page 11)
16. Thermal Printer Port - Used for printing alarms & data.
17. 16 Port Connector - Operational range: Temperature is +50° C to -200°C Level: 0”-33”
• 0-5VDC Outputs - For Temp. A, Temp B. and Level. (see page 11)
• 4-20mA Outputs - For Temp A. , Temp B. and Level. (see page 11)
• SEQ/OFAF Input and Output Connection - For communication between controllers. (see page 10)
18. AUX RS 485 - RS-485 communications port for future expansion.
19. USB Port - Used for Cryomonitor communications with PC.
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SERIES 2301 CONTROLLER BACK PANEL
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