Global Connect
User Guide
Global Connect User Guide
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Effective: January 10, 2019
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Information subject to change without notice.
Pin Number
Description
1
No Connection
2
Receive (Rx)
3
Transmit (Tx)
4
Data Terminal Ready (DTR)
5
Ground
6
No Connection
7
Request to Send (RTS)
8
Clear to Send (CTS)
9
No Connection
When using Straight-Through DB9 to 3.5mm jack converter cables the typical pinout will be Rx, Tx, Ground on the Tip, Ring,
and Sleeve of the 3.5mm jack respectively. Both Straight-Through and Null-Modem cables exist for DB9 to 3.5mm jack cables
as well (Section
8.3
).
8.3 STRAIGHT-THROUGH AND NULL-MODEM CABLES
When connecting the GCSL232 to a serial device the correct cable must be used. The following table lists the correct cable
type that should be used when connecting the GCSL232 to serial devices with the DB9 connector.
Gender of connected device
Cable
Male
Female to Female, Null-modem/Crossover Cable*
Female
Female to Male, Straight-Through Cable*
*Note: The above table lists the suggested cable based on the widely and most prominent accepted pinout for DB9 serial
devices. Though rare, some manufacturers do not follow this pinout. For those cases, a different cable may be needed.
9.0 GCRL3A – RELAY CONTROL MODULE (6 RELAYS)
Relays are some of the most basic forms of control. Contact closure relay uses a simple dry contact to trigger a relay event
and is one of the most basic forms of control. Despite their simplicity, the ability to provide power or a dry contact makes
them suitable for controlling devices through powering them on and off, or by providing control input to voltage inputs or dry
contact inputs.
