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3.4 Wiring
+ −
4 ... 20 mA
Ex ia Input
Iin
(P / T)
3+
3−
4 ... 20 mA Iout
Iout3 Iout2 Iout1
2+
2− 1+
1−
V
in +
V
in − D +
D −
GND
RS-485
18 ... 30 VDC
RS-485
1
2
Figure 12 MGP260 screw terminal markings and cable routes
The optional Ex ia external sensor input wiring (
1
) must be kept
separate from the analog output, power supply, and RS-485 wiring (
2
). Always
use separate cables on each side of the metal barrier.
CAUTION!
Connect only de-energized wires. Never switch on the power supply
input before completing the wiring and closing the connection box.
CAUTION!
1. Connect the input, output, and power supply wiring as required in your application.
shows an example of wiring the device when all inputs and outputs are
used.
•
1
: Optional external pressure or temperature sensor input wiring (Ex ia): route the
cable to the terminal through the M16x1.5 lead-through and through the strain relief
cable clamp above the component board.
•
2
: Analog output, power supply input and RS-485 wiring: route the cables to the
terminals through the M20x1.5 lead-throughs (1 or 2) and through the strain relief
cable clamp below the component board.
• After connecting the wiring, adjust cable length and fasten the cables with the strain
relief clamps.
MGP260 User Guide
M212504EN-A
28
陕西威瑞仪器仪表有限公司 生产代理销售:实验检测设备 气象科学仪器设备
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