Serial Devices

Seven RS-232 serial devices are read into the computer using a single, eight channel IP-Octal 232 Industry Pack. The devices are connected as described below. All control devices are mounted in the same electronics rack as the IOC.

Device	Description	Eng. Units	Location	Control Device	Octal Ch.
Liquid Helium Levels
LL91101	500 l dewar	0-100%	500 L dewar	AMI 136	0
LL91112	Tailpiece	0-100%	Refrigerator	ILM, ch. 1	1
LL91113	Separator	0-100%	Separator	ILM, ch. 2	1
Temperature Diodes
TD9180	Si Diode	1.4-300 K	5 K supply valve	ITC502, ch. 1	2
TD9178	Si Diode	1.4-300 K	Cold return valve	ITC502, ch. 2	2
TD91110	Si Diode	1.4-300 K	LN2 transfer line	ITC502, ch. 3	2
Allen-Bradley Resistance Thermometers (8 total)
TI9110x	Si Diode	1.4-250 K	magnet	ITC501	3
Refrigerator Resistance Thermometers (8 total)
TR9110x	Carbon/RuO	270-10k$\Omega$	refrigerator	Keithley multimeter	4
Optical Encoders
EV91102	Transfer line valve	0-4 turns	500 l dewar	ED-2 #1, ch. 1	5
EV91127	Separator valve	0-4 turns	gas panel	ED-2 #1, ch. 2	5
EV91120	Run valve	0-4 turns	refrigerator	ED-2 #2, ch. 1	6
EV91121	Bypass valve	0-4 turns	refrigerator	ED-2 #2, ch. 2	6