Halytech
hydroSpider2 User’s Manual v1.23
Page 82
Appendix B.
RS-232 / Serial
This section applies to hydroSpider units that have been factory fitted with the RS-232 / Serial
interface option.
This option removes the OC control and the native DIN2 and AIN2 channels, but adds the capability
to monitor up to 16 inputs. These can be made up of any combination of up to 2 native inputs, 4
system inputs (Battery Voltage, Charger Voltage, System Temperature and Moisture Detector and up
to 16 intelligent RS-232 / serial inputs.
Appendix B1.
Input Connections
The following table describes the pins of the hydroSpider’s green I/O and Power connector. All pins
are labelled on the lid of the hydroSpider.
Label
Name
Function(s)
Comment
GND
GND
Ground
Common for all signals
AIN1
AIN1
Analogue 1
(Voltage 0 - 2.4V or
Current 4-20mA)
User selectable
DIN1
DIN1
Switch 1
Counter 1
Active is short to ground
TxD
TxD
Serial transmit data
Output
RTS
RTS
Serial RTS signal
Output
RxD
RxD
Serial receive data
Input
SWP
PWR OUT
Switched Power Out
Driven by control 1, max 1A
BATT
PWR IN
External Power In
or Battery
Nominal 12V DC
max 7.2Ah battery
CHG
CHARGER IN
Charger Supply In
15V – 24V 2A DC or
12V Solar Panel
GND
GND
Ground
Common for all signals
RS-232 / serial interface specific pins that are different from those on the standard hydroSpider are
highlighted in yellow.
NOTE:
The standard RS-232 interface is designed to operate only with industry-standard RS-232
signal levels.
Alternatively, Halytech can fit the hydrospider with a special serial interface, intended for use with
3.3V or 5V logic signals only (not true RS-232).
A label, placed next to the green I/O and Power connector, clearly identifies these units, which
should not be used with standard RS-232 equipment.
