TDK-Lambda 203, Operator'S Manual, Page: 35 / 60

CONTROLS, INDICATORS, CONNECTORS
83489011 Rev A
5-11
REF DESCRIPTION NOTE SECTION
12 AC input terminal AC input terminal block 5.15.11
Table 5-3 203/303L Rear panel Functions
The function of each item in Table 5-3 is described in the following sections.
5.15.1 INHIBIT BNC (Ref 1)
The inhibit BNC input is a standard BNC socket that allows an external connection to a
pulse generator or control system and gives the user control of the power supply output
current. A logic 1 (10-15V) input will inhibit the supply (shuts off the output current) and
a logic 0 (ground or open) allows the supply to operate.
5.15.2 Coolant Water Inlet/Outlet (Ref 2/4)
¼ NPT male threaded pipe connection for external cooling water supply.
5.15.3 HV Output Connector
Connector socket for mating HV cable supplied with unit. The connector should be kept
clean and free from debris at all times.
5.15.4 Cooling Fan
Although the supply is water cooled a small cooling fan is used to cool the AC input cir-
cuitry. Allow at least 5 inches of clearance and do not obstruct clear air flow around the
fan.
5.15.5 Interlock/Power On Terminal strip
Provides an external connection for the customer to allow both interlock and remote
power on functions to be controlled. The interlock terminals should be connected to any
safety interlock circuitry in the power supply installation. The remote power on terminals
are wired in series with the front panel ON switch, and can be used as a remote
ON/OFF switch if the front panel switch is left in the ON position.
Note: The Inter-
lock/remote power on terminals are connected to floating chassis referenced
24VAC circuits and should never be connected to ground.
5.15.6 Remote connector
A 25 pin D-sub male connector that allows remote operation and monitoring of all power
supply functions when the unit is operated in REMOTE mode.
5.15.7 Slave connector
A 25 pin D-sub female connector that allows connection of a slave supply for increased
power operation.
5.15.8 Coolant service valve
External valve to allow topping up of the HV tank with coolant without the need for re-
moving the top cover. Do not undertake this procedure without contacting the factory.
5.15.9 Tank pressure gauge
The tank pressure gauge indicates the pressure inside the coolant filled HV assembly.
With the power supply non operating at room temperature the gauge should show a
vacuum between 10 and 15in Hg. With the supply operating at full power the gauge
should read between 10 and 15PSI.