iOptron 8427 User Manual

ST-4 Autoguiding Adapter

# 8427

Instruction Manual

iOptron Corporation, 6E Gill Street, Woburn, MA 01801

www.iOptron.com

iOptron’s ST-4 Autoguiding Adapter (ST-4 Adapter) is an accessory used together with an
iOptron’s equatorial mount for autoguide application. It supports iOptron products including #8419
SmartStar
as an EQ mount. It also supports GOTOSTAR dual axis motor kits. This device provides a bridge
between an ST-4 compatible autoguiding equipment and an iOptron’s mount.

®

PR GEM, #8400 GoToNova dual axis motor kits, and other SmartStar® mount setting

Hardware included:

• ST-4 Adapter

• 6P4C coiled cable

Firmware：

GoToNova 8401 hand controller with firmware version Ver090630 and beyond.

Connection:

Figure 1. ST-4 adapter and cable

ST-4 Adapter has two ports, as indicated in Figure 1: iOptron Port and Guide Port. Connect one
end of supplied 6P4C coiled cable to the iOptron Port of the adapter. Plug the other end into an
available HBX port (Port A or Port B socket on the mount.) Connect Guide Port to ST-4 compatible
autoguiding equipment using a 6P6C RJ-12 cable (not included).

Note: Do not plug ST-4 autoguiding cable (which also has a 6 pin RJ plug cable) into GoToNova
hand control port, neither the HBX on an iOptron mount. This could damage hand controller, mount
control board or ST-4 autoguiding equipment.

Operation:

Press MENU, select Auto Guide, press ENTER. If an ST-4 Adapter is connected, “Auto Guide Port”
will show on 8401 screen (Figure 2).

Now the motors can be controlled by a guiding signal from an ST-4 compatible autoguiding
equipment through Guide Port. Use the number key to select guide rate.

2