Siemens SEZ91.6 Interface
Technical Instructions
Document No. CA1N5143E-P25
Rev. 1, August, 2000
Description
Interface between phase cut controllers and valves or actuators.
Features
- Input: 0 to 20 Vdc phase cut
- Output: 0 to 10 Vdc
- Two operating ranges, for magnetic valves and damper actuators
- Inputs and outputs short-circuit-proof and protected against polarity reversal
Product Number
SEZ91.6
Warning/Caution Notations
| WARNING: ⚠️ | Personal injury/loss of life may occur if a procedure is not performed as specified. |
| CAUTION: ❗ | Equipment damage may occur if the user does not follow a procedure as specified. |
Application
The interface is used when operating 0 to 10 Vdc magnetic valves, Flowrite™ valves or OpenAir™ damper actuators in conjunction with controllers with a 0 to 20 Vdc phase cut output signal.
Function
- The SEZ91.6 interface is used in retrofit projects.
- An operating voltage of 24 Vac is required for the interface.
- All terminal connections are short-circuit-proof and protected against polarity reversal.
Ordering
When ordering, specify the quantity, product number and description.
Mechanical Design
- The plastic housing accommodates the printed circuit board and the terminal connections.
- The housing is sealed with a plastic, shrink-wrapped sleeve.
- The SEZ91.6 has a white label.
- The two different operating ranges are selected by connection to the relevant input terminal.
Mounting
Provided the interface is mounted in a dry environment, it can be located wherever there is sufficient space and in any orientation:
- In the control panel on DIN rails or in the trunking
- Unit-mounted
- In ceiling voids
- In remote distributor boxes
Diagram Description (Figures 3 & 4): Visuals show the SEZ91.6 interface mounted on DIN rails within a control panel and also shown as a unit mounted within a distributor box.
Specifications
| Value | ||
|---|---|---|
| Supply Voltage (Output Side) | Operating voltage | 24 Vac ±20%, Class 2 |
| Frequency | 50/60Hz | |
| Power consumption, excluding field devices | 0.5 VA | |
| Inputs | For magnetic valves | |
| Type | 0 to 20 Vdc phase cut | |
| Load impedance | 2K ohm | |
| Maximum voltage (phase cut) | 30 Vdc | |
| Operating range | 10 to 20 Vdc phase cut | |
| For damper actuators | ||
| Type | 0 to 20 Vdc phase cut | |
| Load impedance | 2K ohm | |
| Maximum voltage (phase cut) | 30 Vdc | |
| Operating range | 2 to 12 Vdc phase cut | |
| Outputs | Type | 0 to 10 Vdc |
| Minimum load impedance | 5K ohm | |
| Maximum output voltage | 12 Vdc | |
| Connections | Screw terminals for maximum 2 x 14 AWG | |
Specifications, Continued
| Value | ||
|---|---|---|
| Weight/Dimensions | Weight (including packaging) | 0.13 lb. (0.06 kg) |
| Dimensions (L x W x H) | 2.24 x 0.87 x 0.71 inches (57 x 22 x 18 mm) | |
| Ambient Conditions | Operation Temperature | 32 to 122°F (0 to 50°C) |
| Operation Humidity | Maximum 85% rh | |
| Storage Temperature | -13 to 149°F (-25 to 65°C) | |
| Storage Humidity | Maximum 95% rh | |
| Agency Approvals | Conforms to CE requirements | |
Connection Terminals
Input Side (Figure 5)
- G0: System neutral
- Y: Control signal 0 to 20 Vdc phase cut for damper actuators
- G+: Control signal "Plus" (for phase cut, 100 Hz half-wave)
- Y: Control signal 0 to 20 Vdc phase cut for magnetic valves
Output Side (Figure 6)
- Y: Control signal, 0 to 10 Vdc
- G0: System neutral
- G: System voltage 24 Vac
- G0: System neutral
Wiring Diagrams
Figure 1. KLIMO Controller.
Description: A graph illustrating the KLIMO controller's operating ranges. The Y-axis represents VDC Phase-cut, and the X-axis represents W (Temperature). It shows the magnetic valve operating range between 10 and 15 Vdc phase-cut, and the damper actuator operating range between 2 and 10 Vdc phase-cut. Xp denotes a point on the magnetic valve range.
Figure 2. Effective Range.
Description: A graph depicting the effective operating range of the SEZ91.6 interface. The Y-axis shows VDC (Output signal), and the X-axis shows VDC phase-cut (Input signal). It indicates that input signals above 12 Vdc phase-cut correspond to the damper actuator range, and input signals between 10 and 20 Vdc phase-cut correspond to the magnetic valve range.
Figure 7. SEZ91.6 Interface with Magnetic Valves.
Description: This diagram illustrates the wiring between a controller (N1, e.g., KLIMO RDK99), the SEZ91.6 interface (U1), and a magnetic valve (Y1, e.g., MX...461..., M2H...FY). It shows connections for 24 VAC power, input signals (Y, G+, G0), and output signals (Y, G0). A note indicates G0 – (Ym) is recommended for MX...461...
Figure 8. SEZ91.6 Interface with OpenAir Damper Actuators.
Description: This diagram shows the wiring for connecting the SEZ91.6 interface (U1) to an OpenAir damper actuator (Y1, e.g., GBB161.1E) and a controller (N1, e.g., KLIMO RDK99). It details the 24 VAC power and signal connections (Y, G+, G0 for input; Y, G0 for output). A position feedback (V) is also indicated.
Dimensions (Figure 9)
Description: A diagram showing the physical dimensions of the SEZ91.6 interface. The length is 2.24 inches (57 mm), the width is 0.87 inches (22 mm), and the height is 0.71 inches (18 mm). The diagram labels the input and output sides.
