6
Remote Keypad User Guide
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Issue 1
2.2
Connection
The Remote Keypad requires a minimum of three electrical connections - the external power supply, the chassis earth and the RS485
Starter port. All external wiring, except the chassis earth (M4 stud provided), is connected to spring operated clamp connector terminals
with a maximum wire size of 2.5 mm
2
. No special tools are required.
Once the Remote Keypad Module has been installed, wire between the Remote Keypad and the module.
Figure 2-4 Remote Keypad connections
1
2
3
Digistart CS
Remote Keypad Module - RS485 serial port
Remote Keypad
B10, B11: 4-20 mA analog output (motor current)
B1, B2, B3: RS485 connection to starter/module
B6, B7, B8: RS485 connection to network
1, 2: power supply (18 to 30 Vac/dc)
For the Remote Keypad to accept serial commands, a link must be fitted across terminals CSL-DI2 on Digistart CS starters.
2.2.1
Grounding and shielding
Twisted pair data cable with earth shield is recommended. The cable shield should be connected to the GND device terminal at both
ends and one point of the site protective earth.
2.2.2
Termination resistors
In long cable runs prone to excessive noise interference, termination resistors should be installed between the data lines at both ends of
the RS485 cable. This resistance should match the cable impedance (typically 120
Ω
). Do not use wire wound resistors.
