West Control Solutions CALogix - Manual (Page 7)

Electrical Installation
The system is designed to be installed in an enclosure which provides adequate protection against electrical shock. The
enclosure should also be of a sufficient IP (NEMA) rating for protection against water and dust.
CALogix should be
mounted in an enclosure with minimum internal dimensions of 160 wide x 125 high x 85 mm deep.
OUTPUT DEVICES
Three types of output are available on an output module: relay, solid state relay drive (ssd) and analog. Output 1 may be
any one of the three options, output 2 can be relay or ssd and output 3 is always relay. Any of these outputs can be
assigned as SP1, SP2 and SP3 using the CALogix-sw software. Check the model number and output configuration before
wiring the instrument and applying power. See section on output options for more details.
1. Solid state relay drive
12Vdc +10/-15% (nominal), 20mA
To switch remote SSR
2. Miniature power relay
2A/250Vac resistive, Form A
/ SPST contacts
3. Analog Output (Isolated) - NOT AVAILABLE WITH LOGIC I/O MODULE
Specify 4-20mA 500Ω max, ±0.1% fs typical
0-5Vdc 10mA (500Ω min). ±0.1% fs typical
0-10Vdc 10mA (1KΩ min). ±0.1% fs typical
SUPPLY VOLTAGE
18-30Vdc, 8 watts ±10% fluctuation permitted
WIRING A CONNECTOR
Prepare the cable carefully, remove between 6 and 8mm insulation and ideally tin or terminate to avoid bridging. Prevent
excessive cable strain. Maximum recommended wire size 32/0.2mm 1.0mm² (18 AWG)
REPLACING MODULES
Hot plugging of modules should not be carried out. To change a module always depower the base-unit. Once power is re-
applied the carrier will reload the settings for that module and continue with the original module settings. Hotplugging can
cause the carrier to fail and is potentially dangerous.
INDUCTIVE LOADS
To prolong relay contact life and suppress interference, it is recommended engineering practice to fit a snubber
(0.1µF/100Ω) between relay output terminals.
CAUTION
Snubber leakage current can cause some electro-mechanical devices to be held ON. Check with
manufacturers specification.
EN61010 - 1 / UL61010C-1/ CSA22.2 No 1010
Compliance shall not be impaired when fitted to the final installation.
Designed to offer a minimum of basic insulation only.
The body responsible for the installation is to ensure suitable for measurement category II or III
To avoid possible hazards, accessible conductive parts of the installation should be protectively earthed in accordance
with EN61010 for Class 1 equipment.
Output wiring should be within a protectively earthed cabinet.
*Sensor sheaths should be bonded to protective earth or not be accessible
Live parts should not be accessible without the use of a tool.
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