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Instruction Manual
Remote I/O & Interface Connector
9-pin D-sub female. (Mating connector: InstruTech p/n 000263 + 000264)
pin number
1
2
3
4
5
6
7
8
9
1. The relays are disabled by applying a continuous ground to pin # 9. This will prevent any switching of the
relay contactors during operation of the VGC301.
Relay Connector
6-pin pluggable terminal strip (Mating connector: Phoenix p/n1803617 or InstruTech p/n 000347)
pin number
1
2
3
4
5
6
Gauge cable assembly
P/N CB 421-1- XXXF is a custom cable assembly provided in different lengths from InstruTech for connecting the
VGC301 controller to InstruTech CVG101 Worker Bee or Brooks Automation, Inc. / Granville-Phillips
®
Convectron
gauge tube. The cable pin to pin connection is shown below.
VGC301 pin number
1
2
3
4
5
6
7
8
9
InstruTech, Inc.
pin description – 4 Wire RS485
RS485 RDA (- ) Input
RS485 RDB (+) Input
RS485 TDA (- ) Output
RS485 TDB (+) Output
RS232 TX
RS232 RX
analog signal output
(non-linear, linear, or log-linear)
signal ground
1)
(
relay disable
pin description
relay 1 common
relay 1 NC
relay 1 NO
relay 2 common
relay 2 NC
relay 2 NO
connects to
CVG101 gauge pin number
pin description – 2 Wire RS485
RS485 DATA A (-) Input/output
RS485 DATA B (+) Input/output
RS232 TX
RS232 RX
analog signal output
(non-linear, linear, or log-linear)
signal ground
relay disable
CVG101 molded plastic connector
NC
cable shield
3
NC
2
5
1
1
NC
VGC301A Controller
1)
(
®
275
P/N CK431-01
Page 11
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