This product is no longer available. Some accessories, replacement parts, or services may still be available.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | No |
Overview
The SDM-SIO4 is a legacy product and should be purchased only as a replacement or for use with legacy dataloggers such as the CR10X. When considering the purchase of an SDM-SIO4, first consider using the SDM-SIO1 instead. Please note that the SDM-SIO4 is not compatible with all dataloggers.
Primarily for legacy dataloggers, the SDM-SIO4 adds serial I/O capacity and flexibility. It has four serial ports that communicate with serial sensors, display boards, printers, and other serial devices. After being programmed, the SDM-SIO4 communicates with connected devices in parallel with the datalogger's own program sequence.
Read MoreBenefits and Features
- Provides four configurable serial RS-232 ports
- A multitasking operating system allows concurrent transmission and receipt of data on all ports.
Images
Detailed Description
The SDM-SIO4 is a legacy product and should be purchased only as a replacement or for use with legacy dataloggers such the CR10X. When considering the purchase of an SDM-SIO4, first consider using the SDM-SIO1 instead. Please note that the SDM-SIO4 is not compatible will all dataloggers.
Specifications
| Communication Rate | Speed at which data is transferred is controlled by the data logger and can vary with the microprocessor activity as well as the length of the SDM cables. |
| Typical Transfer Rate | One byte per millisecond |
| Power Supply | Unregulated 12 V supply, 9 to 18 Vdc |
| Internal Battery | Retains configuration information only. (Lithium battery has an estimated life of 10 years.) |
| Number of Ports | 4 (independently configurable for different serial data formats) |
| Serial Ports Baud Rate | 25 to 115,200 bps |
| Port Output |
|
| Port Configuration | 9-pin D connectors |
| Data Flow Control | By data logger or SDM-SIO4, if required, using hardware or software protocols |
| Onboard Diagnostics | Built-in system watchdog resets the processor in the event of a crash caused by transients and a built-in LED gives an indication of SDM-SIO4 status on power-up. |
| Input Voltage Limits | ±25 V |
| Operating Temperature Range | -25° to +50°C |
| Dimensions |
|
| Weight | 499 g (1.1 lb) |
Current Drain |
|
| All Ports Active | 40 mA |
| Quiescent | 0.7 mA (quiescent state entered if there is no SDM or port activity for ~30 ms) |
Buffers (each port) |
|
| Type | Fill & stop (Once filled, additional data received is lost.) |
| Receive (Rx) | 981 bytes + 16-byte hardware buffer |
| Transmit (Tx) | 981 bytes + 16-byte hardware buffer |
| Processed Data Storage | 891 bytes (suitable for storing 224 4-byte Campbell Scientific floating point values) |
| Floating Point Buffer | Used only when the data logger outputs floating point data via the SDM. This buffer is 241 bytes—sufficient for 60 floating-point values. |
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Dataloggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | To use the SDM-SIO4 with a CR10 requires a six-conductor cable instead of a five-conductor cable. The extra conductor attaches to control port 6,7, or 8. A Library Special PROM with Instruction 113 is also required. | |
| CR1000 (retired) | Although the SDM-SIO4 is technically compatible with the CR1000, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. | |
| CR10X (retired) | To use the SDM-SIO4 with a CR10X requires a six-conductor cable instead of a five conductor cable. The extra conductor attaches to control port 6,7, or 8. The operating system must be CR10X OS version 1.4 or later. | |
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | Although the SDM-SIO4 is technically compatible with the CR3000, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. |
|
| CR500 (retired) | ||
| CR5000 (retired) | SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. | |
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | Although the SDM-SIO4 is technically compatible with the CR800, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. | |
| CR850 (retired) | Although the SDM-SIO4 is technically compatible with the CR850, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. | |
| CR9000 (retired) | SDMs connect to ports provided on the CR9080 PAM module. | |
| CR9000X (retired) | SDMs connect to ports provided on the CR9032 CPU module. |
Mounting Equipment
| Product | Compatible | Note |
|---|---|---|
| ENC10/12 | ||
| ENC10/12R | ||
| ENC12/14 | ||
| ENC14/16 | ||
| ENC16/18 | ||
| ENC24/30 | ||
| ENC24/30S |
Distributed Data Acquisition
| Product | Compatible | Note |
|---|---|---|
| Granite 10 | ||
| Granite 6 | ||
| Granite 9 |
Additional Compatibility Information
Note: Future data loggers may not support the SDM-SIO4, and therefore it is only recommended for existing networks that already contain this interface.
Data Logger Considerations
Programming
The SDMSIO4 Instruction controls the SDM-SIO4 operation in CRBasic. Instruction 113 controls SDM-SIO4 operation in Edlog (a Library Special PROM may be required in older data loggers).
Power Requirements
Because of the minimal current drain (0.7 mA quiescent, 40 mA with all four ports active), the SDM-SIO4 is typically powered directly from the data logger. A supplementary power supply may be required for some applications, especially where more than one SDM is operated by a single data logger.
Enclosure Considerations
The SDM-SIO4 requires a desiccated, non-condensing environment; a Campbell Scientific enclosure is recommended. The SDM-SIO4's case has mounting flanges for attachment to the 1"-on-center hole grid of Campbell Scientific enclosures. Grommets and screws are provided to attach the flanges to the backplate of our enclosures.