Section 3 – Installation
Read the following procedures prior to connecting inputs to the terminals.
WARNING: Ensure the power is off before connecting signal inputs to the unit.
The plug in screw terminal connectors are of the clamping screw variety, putting even pressure on the signal wire. It is therefore not necessary to terminate the wires with lugs, however you may do so if you wish. The maximum gauge wire that can be accommodated is 14 AWG or 2.5 mm². You will need a small screwdriver and a pair of wire cutters and strippers. The use of shielded twisted lead wire is recommended to minimize electromagnetically induced noise.
WARNING: All unused inputs must have + and - contacts commoned together.
CAUTION: Never run signal and power or control wiring together in the same conduit. This is to prevent possible recording error due to induced signals between lines. If running cables is inevitable, use shielded cable where possible and properly ground the shield. Route signal wires away from power wires at the rear panel.
NOTE: | Ground cable shields at one end only to eliminate the possibility of interference due to |
| ground loop currents. When grounded transducers are used, the shield should be |
| grounded at the sensor end only. |
3.4.3.1Analog Inputs
The Analog Input board can have 6 or 12 channels (12 shown below). Each Input is truly differential and has a positive (IN+) and negative
Figure 3-9 Analog Input Module (12 Channels shown)
3.4.3.2Thermocouple Inputs
Thermocouple Input connections are made as shown in Figure
3.4.3.3Resistance Temperature Detector (RTD) Inputs
Two or three wire RTDs may be used for connection with cable compensation of up to ±50 ohms. The “COM” Terminal is the common current return (Wire 3). Four wire RTDs can be used – simply do not connect the second + wire. Two wire RTDs require a jumper between
3.4.3.4Linear Inputs
Linear Inputs are divided into two types:
Current inputs:
Voltage inputs: +125mV, +250mV, +500mV +1.00V, +3.0V, +6.0V, +12.0V, +24.0V DC.
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