Xylem IM098 AQUAVAR Model 56 Controller - Manual (Page 47)

X2 1 - Ground Connection
2 - Actual value input 0.5 - 4.5 VDC, 50 ohm load resistance
3 - Power source for external control, 5 VDC
4 - Ground connection for external on/off
5 - External on/off connection, 10K ohm, 5 VDC gold plated contact.
If no external control is used, a jumper wire is installed on contacts 4 and 5.
6 - Ground connection for low water switch
7 - Low water switch connection. If no switch is used a jumper wire is installed
on contacts 6 and 7.
8 - Connection for thermistor
9 - Connection for thermistor
10 - Normally closed contact for slave pump
11 - Common contact for slave pump
12 - Normally open contact for slave pump
X3 1 - RS 485 connection. S10 - (low) for connection of AQUAVAR Model 56 Controller to other
AQUAVAR Model 56 Controller units in a set.
2 - RS485 interface connection. S10 + (high) for connection of the AQUAVAR Model 56
Controllers to other AQUAVAR Model 56 Controller units.
3 - RS485 interface connection. Common ground.
4 - RS485 interface connection. +SVDC output signal. Maximum 20m Amp output.
NOTE: When connecting the variable speed pumps (max. 4 pumps) via the interface RS485, the
terminals X3 #1, X3 #2, X3 #3 are to be connected in parallel by means of a shielded cable
to every AQUAVAR Model 56 Controller drive head.
Appendix B (continued)
Drive Head Technical Data (continued)
42