Sensaphone SCADA 3000 Users manual - Manual (Page 273)

26-5
Chapter 26: Analog Output Module
Figure 7: Correct bus termination
ANALOG OUTPUT WIRING INFORmATION
The analog output module has four independent outputs which can be configured to produce
either 4–20mA, 0–20mA or 0–10V. The output type is selected using the jumpers (J8–J11)
above the terminal strip. The output types must be set in pairs. Jumper pair one affects outputs
0 and 1, and pair two affects outputs 2 and 3. This allows you to set, for example, outputs 0 and
1 to 4–20mA, and outputs 2 and 3 to 0–10V. The table below shows how to set the jumpers for
each output type.
Outputs 0 & 1 Outputs 2 & 3
Type Jumper Settings Type Jumper Settings
4–20mA J8: 4–20, J10: mA 4–20mA J9: 4–20, J11: mA
0–20mA J8: 0–20, J10: mA 0–20mA J9: 0–20, J11: mA
0–10V J8: 0–20, J10: V 0–10V J9: 0–20, J11: V
When configured for 4–20mA or 0–20mA, each output can drive a maximum of 1000 Ohms.
The output current is sourced directly from the module. No external loop power is required.
When configured for 0–10V, be sure to drive only high impedance loads to minimize errors. A
typical circuit connection diagram is shown below.
Figure 8: Wiring diagram
The output wiring terminals are designed to accept #14AWG to #24AWG stranded wires.
For short distances you may use ordinary 2-conductor cable. Note that if the output device is
located far from the module or if you are running cable in an electrically noisy environment,
you should seriously consider using shielded cable. This will shield the signal from electrical
interference thereby preventing false readings and/or damage to the module. If you are using
shielded cable, connect the shield to the EG pin on the module. To minimize electrical noise
coupling between I/O lines, follow the guidelines listed below for routing your wires:
• Route the power supply and communications cables to the module by a sepa-
rate path from wiring to I/O devices. Where paths must cross, their intersection
should be perpendicular.