External pressure porting and electrical signal connection pass-thrus are
provided on the left side of the rack when viewed from the front. Pressure ports
include an input for shop air and either two or four output pressure connections to
connect to the Model 9418 Remote Transducer Module or directly to the device
handler (DUT). A cable access port provides entry to the rack for controlling and
reading the remote transducers in the Model 9418 Remote Transducer Module
(25 pin D-sub connector) and a 9 pin D-Sub connector for serial communications
between the rack and a host computer. Sufficient space is allowed for other user
cabling.
The rack will accept AC power (105 to 240 VAC, 47 to 63 Hz.)Power is brought
into the rack via a junction box at the bottom of the rack. The power cord plug on
the input to the rack can be replaced to accept other plugs or can be tied directly
into a main feed. The power cable used is rated for 15 amp service. The Model
9415 system has a power cut off switch located on the top of the left rack which
connects/disconnects the power to the rack’s “Electrical Junction Box”. This box
provides a constant AC power supply to the Model 9414 controllers and houses
electronics for the relay control of the vacuum pump’s AC power supply. The AC
power enters each Model 9414 through a fused and switched “Power Entry
Module” using a standard, NEMA, three-conductor plug. Internally to each Model
9414, the AC power goes directly from the “Power Entry Module” to the front-
mounted, “Emergency Stop” switch which disconnects the AC power going to the
Model 9414’s internal “Switching Power Supply” is rated for 100-240VAC at 47-
63Hz. The switched power is then utilized internally to generate +5 volt DC and
+12 volt DC to control the solenoid valves, electronics, and remote transducers.
The Model 9414 is fused on both the hot and neutral AC lines entering the unit.
The Mensor 6180 transducer(s) in the
remote transducer module (Model
9418) utilize RS-485 for
communications with the Model 9414
Quad Pressure Controller(s). Control
of the isolation solenoids (if equipped)
is done internally in the 9414
controller and provided to the Remote
Transducer Module through the same
25 pin D-sub connector as the RS-
485 communications. The RS-485
port communicates with the remote
transducers at 19200 Baud with 8
data bits, 1 stop bit, and no parity.
Communications between the Model
9414 Dual Pressure Controller and
the user’s computer are on a 9 pin D-
Sub connector at 57,600 Baud, 8 data
bits, 1 stop bit, and no parity. See
Appendix A for a list of the command sets.
