Xylem IM224 R03 Hydrovar Variable Speed Control HV, 2HP-15HP Version 0307 - Manual (Page 2)

Commercial Water
Xylem Inc.
PAGE 2
GND Connection to Power Unit
(attached via the screws)
Section A
Troubleshooting the Control Card (using a Multimeter).
Power Supply disconnected!!!
The following tests have to be made without connected cables.
1) Internal Resistance – Digital Inputs:
Low Water
X3/1 (GND) – X3/11
=> 90k Ω / 2.5M Ω
External ON/OFF (release)
X3/1 (GND) – X3/7 => 14k Ω
Configurable Digital Input (Digi 1):
X3/1 (GND) – X3/9 => 14k Ω
Digital Inputs (Dig 2 /Dig 3 /Dig 4):
X3/1 (GND) – X3/5 / 6 / 15
=> 20k Ω
2) Internal Resistance of the Analogue
Current Inputs:
(Sensor 1/2 - Req. Val 1/2)
X3/1 (GND) – X3/2 / 4 / 18 / 23 =>50 Ω
3) Capacity of Electronic Ground to Earth:
X3/1 (GND) – earth => 60nF
Important to bleed off Hf- Disturbances!
Additional power supply ** max. 100 mA
Current signal input (required val. 2)
0-20mA / 4-20mA [Ri=50Ω]
Analog output 2 4-20mA [Ri=500Ω]
Analog output 1 0-10 VDC
Current signal input (required val. 1)
0-20mA / 4-20mA [Ri=50Ω]
Voltage signal input (required value 2)
0-10 VDC *DIG 4
Voltage signal input (required value 1)
0-10 VDC
Low water
Configurable digital input 1 DIG 1
External ON/OFF (release)
Actual-value-voltage input sensor 1 *DIG 2
Actual-value-voltage input sensor 2 *DIG 3
Actual-value-current input sensor 2
Sensor supply ** max. 100 mA
Actual value current input sensor 1
Ground
X3
X3
24 +24V
23
22
21
20
19 +10V
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3 +24V
2
1