DI-9204Exd Digital Flame-proof Manual Call Point
Installation and Operation Manual
The Intelligent Solution
Page 7
8.3 Application in Supervised Digital Input (SDI) Loop
The MCP can also be used in SDI loop, as in Fig. 10, in which the 2.5k resistor is
connected between Z1 and Z2, and the 1k resistor is connected between K2 and Z1.
1
K
2.
5
K
1
K
1 50
2 50
Fig. 10
9 Troubleshooting and Maintenance
(1) Cannot be programmed
If the MCP cannot be programmed, please check the programmer and connecting
terminals. Otherwise, the circuit may be broken.
(2) Cannot be registered
If the MCP cannot be registered, please check whether the wiring of the bus is
correct, voltage within normal range and the MCP plugged firmly. Otherwise, the
circuit may be broken.
10 Caution
(1) Install and maintain the MCP in compliance with installation code
applied to
explosive hazardous areas.
(2) It is prohibited to open the cover with power on in field.
(3) The enclosure should be earthed.
11 Accessories and Tools
Expansion bolt M8 × 60
2
Screw M5 × 8
2
Washer
Φ
5
2
Spring washer
Φ
5
2
Mounting plate
1
Reset key
1
1k resistor
1
2.5k resistor
1
M5 Allen Key
1
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