Appendices
Polycold Cryochiller
Appendix D: Remote EMO
Installation and Operation Manual
Brooks Automation
12-6
214072 Revision B
Appendix D: Remote EMO
The optional J11 EMO connection allows for a
4-pin Remote EMO control and Remote EMO
Status connection at J11 on the Interface
panel.
The Remote EMO Status and Remote EMO
Control connections allow for monitoring the
status of the compressor contactor and con-
trolling the power to the compressor contac-
tor.
If Remote EMO is not used, J11 EMO Jumper
must be installed or the compressor will not
operate.
EMO Status
Pins 1 and 2 of J11 allow a remote device to sense the status of the Cryochiller EMO circuit.
•
Open circuit between this pair of contacts indicates that the compressor contactor is off or
open.
•
Closed circuit between this contact pair indicates that the compressor contactor is on and the
compressor is probably running.
EMO Remote Control
Pins 3 and 4 of J11 allow a remote device to interrupt the power to the coil of the contactor which con-
trols the power to the compressor motor. Pins 3 and 4 are in series with the power to the compressor
motor contactor relay.
•
When pins 3 and 4 are open, the circuit to the compressor contactor is open. The compressor
cannot operate until this pair is closed. These pins directly interrupt the wiring of the power cir-
cuit that controls the contactor.
•
When pins 3 and 4 are closed, the circuit to the compressor contactor is closed. This allows the
compressor contactor to be turned on by the compressor on/off switch on the Cryochiller.
Pins 3 and 4 must be wired to a switch or a set of relay contacts or must be jumpered using the J11
EMO jumper connector.
Figure 12-3: Remote EMO Connector and J11
J11
EMO
Jumper
J11 EMO
Connector
