3.1.5. analogue outputs, Earth lead connected to terminals 19 or 20 – Innotech Genesis V4 System User Manual
Page 34
Installation Instructions for Innotech Genesis Systems
Edition 011100
3-8
3-3.1.5.
Analogue Outputs.
Sixteen analogue output channels are provided. Each
channel can be configured, through the Genesis II Configuration Software, to operate in
either the Variable Mode or the Heat Valve Mode.
In the Variable Mode, the output is a voltage-analogue signal varying from 0 to +10 Volts
with a maximum current rating of 5mA. In the Heat Valve Mode, the output signal consists
of Pulse-Width Modulated (PWM), 0-10V, high-speed pulses at 5mA. For a description of
PWM as it applies to Heat Valve Operation, refer to the Innotech Genesis II Direct Digital
Controller User Manual.
When using PWM outputs, up to three solid state relays, connected in series, may be used
on each Heat Valve-configured analogue output channel. See Figure 3-3. A maximum of
eight analogue output channels can be applied to Heat Valve operation. For more than eight
Heat Valve outputs, it is recommended that Models IHV4002 or IHV4004 Heat Valves for
Solid State Relays be used. These heat valves are driven by the Digital Controller’s
analogue output channel in the Variable Mode. For more information on these devices,
refer to Data Sheet DS3.31 for Type IHV Heat Valves.
Figure 3-3. Driving Multiple Solid-State Relays.
Refer to Table 3-5 for analogue output terminal numbers. There are 16 analogue active
signal terminals (AO1 through AO16), one for each channel and eight return (Common)
terminals. The fewer number of Common terminals is intended to reduce the overall
number of terminals.
Cable screening may be terminated into the Screens Terminals (19 and 20), space
permitting. Alternatively, all cable screens can be combined by soldering within the slotted
cable-routing ducts with a common 1mm
2
-earth lead connected to Terminals 19 or 20.
1
2
3
+
v
e 4
1 2
3
+
v
e 4
1
2
3
+
v
e
4
+
A
N
A
L
O G
U
E
O
U
T
P
U T
T
E
R
M
I N
A
L
S
T
O
H
E
A
T
E R
S T
O
H
E
A
T
E R
S
T
O
H
E
A
T
E R
S
L
1 L
2
L
3
1
2
3
+
v
e 4
1 2
3
+
v
e 4
1
2
3
+
v
e
4
+
A
N
A
L
O G
U
E
O
U
T
P
U T
T
E
R
M
I N
A
L
S
T
O
H
E
A
T
E R
S T
O
H
E
A
T
E R
S
T
O
H
E
A
T
E R
S
L
1 L
2
L
3
1
2
3+ve
4
1
2
3+ve
4
1
2
3+ve
4
+
-
ANALOGUE
OUTPUT
TERMINALS
TO
HEATERS
TO
HEATERS
TO
HEATERS
L1
L2
L3