MGC ALCN-792M Quad Loop Adder Motherboard and Daughter Board Instruction Manual
- June 9, 2024
- MGC
Table of Contents
MGC ALCN-792M Quad Loop Adder Motherboard and Daughter Board
The ALCN-792M Quad Loop Adder and the ALCN-792MISO Isolated Quad Loop Adder module provide two addressable loops plus an additional two loops as part of the daughter board ALCN-792D which is mounted over the ALCN-792M/ALCN-792MISO. The Quad Loop Adder module may be mounted over the main chassis of the Network Fire Alarm Panel or on any chassis that supports adder boards. This module is mounted using four #6 screws and (if necessary) four 1 1/2″ spacers
Power| The power is supplied to the board via cable from the main chassis
board or from the previous loop controller module into the P1 POWER IN
connector. Connect the P2 POWER OUT connector to the next loop controller
module or other adder module. One power cable is supplied with this module.
---|---
RS-485:| The RS-485 cable comes attached at P3 on ALCN-792M and P4 on ALCN-
792MISO and is either connected to P3 of the main fire alarm controller module
or connected from the previous loop controller module or other adder board. If
the next loop controller module is used, connect the RS-485 out at P4 on ALCN-
792M or P3 on ALCN-792MISO to the next loop controller module; if it is not
used, leave without connection.
DIP Switches:| Use the DIP switches to set the binary address of the board.
SW1-1 is the lowest significant digit and ON is active. For example, an
address of two would be created by turning SW1-1 OFF, SW1-2 ON and DIP
switches SW1-3 to SW1-8 OFF. Refer to DIP switch settings in table below.
Loop 1:| This is the addressable loop for all initiating devices. Wire the
loop as shown in the Network Fire Alarm Manual .
Loop 2:| This is the addressable loop for all initiating devices. Wire the
loop as shown in the Network Fire Alarm Manual .
Shield:| If the loops are shielded, connect the shields to the terminals
marked COM(-). To prevent the board reporting a ground fault, do not connect
shields on SLC lines to earth ground.
Note: Unshielded wiring is preferred.
Jumpers:| ALCN-792M and ALCN-792MISO:
• JW1: Factory use only. Leave open.
• JW2: Factory use only. Leave closed.
• JW3: 3 pin jumper. Normally set to 1-2, can be set to 2-3 to prevent noise from CLIP System Sensor sounder bases on Loop 1. Pin 1 is marked with a dot.
• JW4: 3 pin jumper. Normally set to 1-2, can be set to 2-3 to prevent noise from CLIP System Sensor sounder bases on Loop 2. Pin 1 is marked with a dot.
• JW6 on ALCN-792MISO: Factory use only. Leave closed. ALCN-792D:
• See page 4.
RS-232 Debug Interface (ALCN-792M only):| This connection is for factory use
only.
JTAG Port:| This connection is for factory use only.
ALCN-792M/ALCN-792MISO DIP Switch Setting
Set the DIP switches on SW1 starting at address 1 for the first ALCN-792M
/ALCN-792MISO adder and consecutively up to seven for the next six ALCN-792M
/ALCN-792MISO modules. Refer to the Network Fire Alarm Manual for the maximum
quad ALCN-792M/ALCN-792MISO adder modules allowed per node.
ALCN-792M/ALCN-792MISO Loop Adder Module Address Setting (DIP SWITCH SW1)
ALCN-792M/ ALCN-792MISO| ADDR| SW1-1| SW1-2| SW1-3| SW1-4| SW1-5| SW1-6|
SW1-7| SW1-8
---|---|---|---|---|---|---|---|---|---
1| ON| OFF| OFF| OFF| OFF| OFF| OFF| Put in “ON” position for firmware restore
to defaults during power up. At all other times put in “OFF” state.
2| OFF| ON| OFF| OFF| OFF| OFF| OFF
3| ON| ON| OFF| OFF| OFF| OFF| OFF
4| OFF| OFF| ON| OFF| OFF| OFF| OFF
Refer to Network Fire Alarm Manual as to whether addresses 5, 6 and 7 are
available
5| ON| OFF| ON| OFF| OFF| OFF| OFF
6| OFF| ON| ON| OFF| OFF| OFF| OFF
7| ON| ON| ON| OFF| OFF| OFF| OFF
ALCN-792M Module Layout
The location of Loop 1 and 2 terminals on ALCN-792M are shown in Figure 1 below. Also shown are the power in and out cable locations, DIP switch location, and jumper locations.
ALCN-792M Quad Loop Adder Module
Notes for ALCN-792M:
- All circuits are power limited and must use type FPL, FPLR, or FPLP power limited cable.
- Loop wiring: maximum loop resistance is 40 ohms total. These lines are power-limited and fully supervised.
- For complete wiring instructions, refer to the LT-894 (LT-894SEC) Network Fire Alarm Manual.
ALCN-792MISO Module Layout
The location of Loop 1 and 2 terminals on ALCN-792MISO are shown in Figure 2
below. Also shown are the power in and out cable locations, DIP switch
location, and jumper locations.
ALCN-792MISO Isolated Quad Loop Adder Module
Notes for ALCN-792D:
- All circuits are power limited and must use type FPL, FPLR, or FPLP power limited cable.
- Loop wiring: maximum loop resistance is 40 ohms total. These lines are power-limited and fully supervised.
- For complete wiring instructions, refer to the Network Fire Alarm Manual
www.mircom.com LT-6032 Rev. 3.2 May 2019 firealarmresources.com
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>