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Probes Digital Inputs • 17
11 Digital Inputs
The XEV22D comes with two (2) digital inputs: a
voltage-free input and a high voltage input; both can
be configured as cooling call. In this way the cooling
signal can come from the controllers with direct load
outputs or via the controllers with voltage-free out-
puts. One of these inputs must be configured as the
cooling call.
12 Forced Opening
If necessary, change the FOP parameter to force
the valve to open. For example, if FOP is set to 50
(FOP = 50), the valve will be opened at half of full
scale.
To disable this function, set the FOP to default
value (FOP = not used). The valve opening is en-
abled only when CCL digital input is enabled.
13 Electrical
Connections
The controller comes with a screw terminal block
to connect cables with a cross section up to 2.5 mm
2
.
Heat-resistant cables have to be used. Before connect-
ing the cables, verify that the power supply complies
with the controller’s requirements. Separate the probe
cables from the power supply cables, from the outputs
and the power connections.
Do not exceed the maxi-
mum current allowed on each relay, in case of heavier
loads, use a suitable external relay.
13.1.Probes
The recommended temperature probe placement is
illustrated in Figure 13-1, between 0 and 180 degrees
of inclination with respect to the horizontal pipe sec-
tion. For suction pressure probes, there is no particu-
lar recommendation.
14 RS485 Serial Line
All models can be connected to the monitoring and
supervising system XWEB3000. If Mod = StD, the
standard MODBUS-RTU protocol is used; if Mod =
AdU,
the custom XWEB library is required. This last
configuration makes it possible to use the same serial
address of the thermostat that gives the cooling re-
quest to XEV. In this way, it is possible to reduce the
number of addresses used.
Figure 13-1 - Recommended Temperature Probe Placement
- XEV22D Driver for Stepper 1
- Kennesaw, GA 30144, USA 3
- Phone: 770-425-2724 3
- Fax: 770-425-9319 3
- Table of Contents 5
- 1 Introduction 7
- 2 Overview 7
- 3 Wiring Connections 8
- 4 Wiring Guidelines 9
- 5 Mounting and 10
- Powering 10
- 5.2.2. XEV22D Power Wiring 11
- 5.2.3. Wire Type and Maximum 11
- Distances 11
- 7 Absolute 14
- Maximum Power 14
- 8 Front Panel 15
- 9 User Interface 16
- 9.7. How to Assign a 17
- MODBUS Address 17
- 10 Parameters 18
- 11 Digital Inputs 23
- 12 Forced Opening 23
- 13 Electrical 23
- Connections 23
- 14 RS485 Serial Line 23
- 15 How to Use the 24
- 16 Display Messages 25
- 17 Specifications 26
- 18 E2 MODBUS Network Wiring 27
- 19 ECT MODBUS 28
- Networking to 28
- 19.2.COM Port Associations 29
- - E2 Versions 4.2 and 29
- 19.3.E2 Setup of Devices 29
- 19.4.Wiring Types 31
- 19.5.MODBUS Termination 31
- 20 Standard Values 32
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