Signal SDS Series User Manual

SDS Series
59
Cable Size Guide
The chart shows the varying degree of performance in relationship to number of valves run-
ning, cable size, distance and operating pressure. The tests were performed using actual ca-
ble lengths and in workshop test conditions. High resistance and intermittent connections
can effect the performance of the back-channel and valve actuation.
For optimum performance try and ensure that groups of valves operating at the end of the
two-wire cable are split so some operate closer to the controller.
The model SDS-50 controller has a maximum capacity to operate 4 valves at one time with
an additional master valve or pump. The chart below is based on model SD2NC DataCoil™

Signal SDS Series Specifications

General

Type	Surge Protective Device
Maximum Continuous Operating Voltage (Uc)	150V
Short Circuit Current Rating (SCCR)	200kA
Operating Temperature	-40°C to +80°C
Operating Temperature Range	-40°C to +80°C