Andover Controls DCX 250, Installation Manual

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Hardware Installation
DCX 250 Installation Guide 3
Cabinet Dimensions and Weight
Each DCX 250 cabinet (if it has a cabinet) is approximately 8.1
×
8.1
×
3.5 in. and weighs 8.5 lbs.
Power Requirements
Caution
If the DCX 250 is in its own cabinet, it should receive power from its
own independent, unswitched circuit.
The DCX 250 operates on 24 VAC +/–20% 50 or 60 Hz (for smoke con-
trol applications, 24 VAC +10/–15%, 60 Hz). The DCX 250 consumes
up to 18 VA of power.
Cable Limitations
The maximum cable length for Infinet is 4,000 ft at 19,200 baud (up to
32 Infinet controllers). You can extend Infinet beyond 4,000 ft or put
more than 32 Infinet controllers on less than 4,000 ft by using the In-
fiLink 200 amplification module.
Cables that form Infinet are 24-gauge, single-twisted-pair, tinned,
shielded copper wire. Use the following cables1 or their equivalents:
Note
You must use shielded cables for Infinet to ensure compliance with the
Class A FCC limits and to communicate reliably.
• Brand Rex # H 9002 (single-pair)
• Anixter # 9J2401021 (single-pair plenum cable)
The cable should have a nominal impedance of 100 Ohms and a
nominal velocity of propagation of 78%.
1. You can also use any cables you may already have in place for ACNET or LBUS.
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