Multicrest
fire alarm system

CSC004

TMN3060

System Interface Unit (SIU)

Features• NFPA Styles 4 and 7 wiring applicable• Max. 64 nodes available on network• Status LEDs
• Compact size unit
• Easy installation

Description
The SIU is the optional device for the system. The SIU provides the system with the ability to establish communication between the System
Monitoring Program (SMP) installed in a personal computer and FACPs on the network. The network is comprised of 64 nodes so that 1 set ofSIU and SMP is able to communicate with a maximum of 63 FACPs.
The SIU is comprised of two parts such as the AC/DC switching power supply part and the communication part. The AC/DC switching power
supply part converts the AC power to the DC power, and supplies the 24 VDC power to the communication part for its operation. Thecommunication part consists of a central microprocessor, Arcnet controller, and memory that allows it to communicate with other FACPs on thenetwork. Using the optional Fiber-optic Interface Module (PCA-2707XA FIM or PCA-N3060-FIM2) together with SIU provides the system with theability to use the fiber optic system for the network. The 5 VDC power for PCA-2707XA FIM or PCA-N3060-FIM2 is also supplied from the SIU tothe PCA-2707XA FIM or PCA-N3060-FIM2 when required.
The SIU can be easily connected to the RS-232C port of the SMP personal computer using a dedicated connector cable.
The SIU is equipped with status LEDs. The [+5V] LED (green) indicates the normal supply of 5 VDC to the communication part when it is on. The[TXN] LED (green) indicates normal communication with the personal computer of SMP when flashing. The [TXD] LED (green) indicates normalcommunication with the network when it is on. The [ATBL] LED (yellow) indicates open circuit in writing for Port A when it is on. The [BTBL] LED(yellow) indicates open circuit in wiring for Port B when it is on.

Ordering Information
Part No. CSC004

Specifications
No.
1
23
4

Item
Rated Ac input voltage
Maximum electric power consumption
Network wiring style
Maximum no. of nodes

5Max. network length between a node
and another node

6789101112

Wiring characteristic impedance
Maximum wiring DC resistance
Maximum wiring capacitanceOperating temperature range
Operating humidity range
Body colorDimensions

Specification
110 V/240 VAC (Universal)
25 VA (120 VAC)/32 VA (240 VAC)NFPA Styles 4 and 764
600 m (for copper/metal cable)
2000 m (50/125), 1700 m (62.5/125) (for PCA-2707XA FIM)
5000 m (9/125) (for PCA-N3060-FIM2)
100
72
80 µF
0 to 49 ˚C (32 to 120 ˚F)
0 to 93 % (Non-condensing)White
261 mm (10.28”)(H) x 173 mm (6.81”)(W) x 66.5 mm (2.62”)(D)Installation and Wiring Information

P25mm(1")

23mm(0.9")45mm (1.77")173mm (6.81")

8.3mm (0.33")

P30mm(1.18")

47mm (1.85")

170mm (6.69")47mm (1.85")

261mm (10.28")65mm (2.56")41mm (1.61")

66.5mm (2.62")222mm (8.74")
257mm (10.12")

66.5mm(2.62")

+ - G

TB1

Communication part

70mm (2.76")

+ - G

TB2

AC/DC
Switching power
supply part

76mm (2.99")

217mm (8.54")

2+ 2- G

TB2
Port B

1+ 1- G
TB1
Port A

2+ 2- G
TB2
Port BNIU inFACP No.3

TB1
Port ATo the next NIU
or SIU1+ 1- GSIU for SMP
Node No.4

2+ 2- G

TB2
Port B
TB1
Port A

1+ 1- G
TB1
Port A

2+ 2- GTB2Port BSIU for SMP
Node No.2

1+ 1- GNIU inFACP No.3

2+ 2- G

TB2
Port B
TB1
Port A

1+ 1- G
TB1
Port A

2+ 2- G
TB2
Port BNIU inFACP No.1

1+ 1- GSIU for SMP
Node No.2

Style 7 wiring

2+ 2- G

TB2
Port B
TB1
Port ATo the next NIUor SIU

1+ 1- GNIU inFACP No.1

Style 4 wiring

NOTE・The information contained herein does not purport to cover all the details or variations of the equipment described, nor to provide for every
possible contingency that may be met in connection with its installation, operation or maintenance.
・Specifications are subject to change without notice. Contact Nohmi before relying on the information.
・Actual performance is based on proper application of the product by a qualified professional.
・Should further information be required or should particular concerns arise that are not covered sufficiently for the purchaser’s purposes, thematter should be referred to Nohmi or your nearest distributor.

Contact• Head Office: 4-7-3 Kudan-Minami, Chiyoda-ku, Tokyo
102-8277, Japan• Phone: (81) 3 - 3265 - 0231
• F A X: (81) 3 - 3265 - 5348
URL https://www.nohmi.co.jp/english/

Catalog Number 180810Ⓓ-F-18401