SDM-SIO2R

Name: SDM-SIO2R
Brand: Campbell Scientific
SKU: 39969
Availability: InStock

Two-Channel Serial I/O Module with Relays

SDM-SIO2R

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Two-Channel Serial I/O Module with Relays

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Model:: SDM-SIO2R
Item Number:: 39969
Warranty:: 3 years
Lead time:: 21 days

Overview

SDM-SIO2R 2-Channel Serial I/O Module w/Relays

The SDM-SIO2R is a digital sensor expansion module that expands the serial I/O interface via Synchronous Device for Measurement (SDM) communications on a data logger. The serial I/O functionality is identical to the SDM-SIO1A One-Channel Serial I/O Module and the SDM-SIO4A Four-Channel Serial I/O Module, except it has two channels. The SDM-SIO2R also has terminals to connect sensor power and sensor heater power, which are controllable via the SDMGeneric instruction in CRBasic.

Technical Description

The SDM-SIO2R features a connector bus system that connects multiple SDM-SIO2R modules on a DIN rail without having to wire each individual unit. C1, C2, C3, 12V, V+, and G are all bussed between multiple units, making it easy to expand sensor count. Up to eight units can be bussed together with up to 15 sensors. This is the maximum number of SDM addresses available.

Benefits

Hot swappable in the field
Modular design
Expandable as needed
Removable terminals
Power control ability for each individual sensor

Specifications

Function: Expands the serial I/O interface via Synchronous Device for Measurement (SDM) communications on a data logger
Number of Channels: 2
Supported Data Rates: 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bits/s
Supported Modes of Operation: Hardware CTS/RTS flow control is supported in RS-232 mode. The handshaking lines can also be used as general purpose I/O lines.
Supported Modes of Operation: RS-232
(full duplex and receive only)
Supported Modes of Operation: RS-485
(half and full duplex)
Supported Modes of Operation: RS-422
(full duplex)
Supported Data Formats: 8, seven-bit data size*; none, odd or even parity; one or two stops bits

*In seven-bit mode with no parity, the user must ensure that the characters received by the SDM-SIO2R have a delay of at least one bit period between them. This does not affect any other configuration and does not affect transmissions out of the SDM-SIO2R.
Auto Baud Rate Detection: Not supported
PakBus Communications: Use of the serial port for general PakBus communications is not currently supported.
Operating Voltage: Power supply +12 V connection
Operating Voltage: 9 V
(minimum
Operating Voltage: 12 V
(nominal)
Operating Voltage: 30 V
(maximum)
Operating Temperature: -40° to +70°C
Standard Humidity Range: 0 to 95%
(non-condensing)
Dimensions: 133.35 x 76.2 x 19.05 mm
(5.25 x 3 x 0.75 in.)
Weight: 108.5 g
(3.8 oz)

Buffer Sizes

-NOTE-: Both transmit and receive buffers are fill and discard type.
That is, after the buffers become full, no new information is accepted. All further data is discarded until space is made when the data logger requests data from the SDM-SIO2R.
Transmit Buffer Size: 767 bytes
(buffer from the data logger to the sensor)
Receive Buffer Size: 6143 bytes
(buffer from the sensor to the data logger)