Comnet FDC8ISOTM1 User Manual

INSTALLATION AND OPERATION MANUAL

FDC8ISOT(M,S)1

8-CHANNEL OPTICALLY ISOLATED
CONTACT CLOSURE TRANSMITTER

The FDC8ISOT 8-Channel Contact Closure Transmitter unit provides up to eight

independent normally-open (NO) dry contact closures over one multimode or

single-mode optical fiber, when used in conjunction with the companion ComNet

model FDC8NLR Non-Latching Receiver or FDC8R Latching Receiver units. Each

of the contact closure inputs are optically isolated at 1500V to ground, for those

applications where high stray or transient voltages may exist. Microprocessor-

based logic in the FDC8ISOT Transmitter detects a customer-furnished switch

or contact closure, and encodes the closure into robust data packets that are

mapped and transmitted to the FDC8NLR Receiver. Packets received with

excessive bit errors will not result in random changes in the receiver relay

contact resting or actuated states, making this system ideal for mission-critical

remote switching applications. See Figure 3 on Page 3 for contact settings.

These transmitter modules incorporate status indicating LEDs for rapidly

providing a local indication of each contact closure channel and operating power.

See Figure 4 on Page 3 for an explanation of the LED indicators.

Packaged in the exclusive ComNet ComFit housing, these units may be either

shelf or rack-mounted, or may be DIN-rail mounted by the addition of ComNet

model DINBKT1 Adaptor Plate Kit. See Figure A on Page 4 for mounting

instructions.

See Figures 1 – 4 for complete installation information.

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INSTALLATION AND OPERATION MANUAL FDC8NLR

FIGURE 1 – FDC8ISOT TRANSMITTER

MULTIMODE OR
SINGLE MODE
OPTICAL FIBER

BLACK
BLACK WITH WHITE STRIPE

Power Supply:
Surface Mount: 8–15 VDC @ 150mA
Rack Mount: From Rack

FIGURE 2 – FDC8ISOT TRANSMITTER

REAR PANELFRONT PANEL

NOTE: Remove Electrical Connector for Rack Mount Units

TECH SUPPORT: 1.888.678.9427

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