Gai-tronics 12578-001 DATASHEET

Pub. DS12578-001

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Model 12578-001

Monitored Input Module (MIM)

General Information

This data sheet applies to GAI-Tronics Model 12578-001 Monitored Input Module (MIM). The MIM is
used to receive inputs from field devices, monitor the integrity of eight input lines for trouble conditions
or contact activation, and report these conditions to the 69254 Series or 69440 Series Master Control Unit
(MCU). The MIM is comprised of two components: the 69248-101 Central Processing Unit (CPU)
PCBA and the 69251-101 Monitored-In-8 PCBA.

The MIM communicates with the MCU via the 69248-101 CPU PCBA over an RS485 link. The CPU
PCBA interprets and reports the status of the inputs. The MIM is capable of monitoring up to eight
inputs.

Hardware Configuration

Figure 1. Model 12578-001 Monitored Input Module

Specifications

Electrical

Power requirements ......................................................................................... 9-15 V dc (12 V dc nominal)

Current draw .................................................................... 300 mA maximum @ 12 V dc (no ground faults)

Number of input loops ........................................................................................................................ 8 loops

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

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ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

Pub. DS12578-001

Model 12578-001 Monitored Input Module (MIM) Page: 2 of 2

Maximum devices on input loop.................................................................................... Unlimited (Mode 1)

1 (Mode 2)
1 (Mode 3)
Unlimited (Mode 5)

Input/output...................................................................................................................................... Power in

Power out
RS-485 in
RS-485 out
8 field inputs

Data communications......................................................................................................................... RS-485

RS485 termination ............................................................................. On board when P2 jumper is installed

End-of-line device................................................................................................................ 20 kΩ (Mode 1)

5.1 kΩ in series with 15 kΩ across contact (Mode 2)

5.1 kΩ in series with 15 kΩ across contact (Mode 3)
None (Mode 5)

Field Inputs

Mode 1:

Contact closure resistance (activated)................................................................................... 1 kΩ maximum

Open Fault Detection .......................................................................................................... Minimum 65 kΩ

Ground Fault Detection........................................................................................ Less than 200 Ω to ground

Modes 2 and 3:

Contact closure resistance (Mode 2: activated/ Mode 3: de-activated) ................................ 3 kΩ maximum

Open fault detection............................................................................................................ Minimum 65 kΩ

Ground fault detection ......................................................................................... Less than 200 Ω to ground

Wire-to-wire short fault detection........................................................................................ Less than 200 Ω

Mode 5:

Contact closure resistance................................................................................................... 900 Ω maximum

Limitations:

Cable limitations ........................................................................................ 100 Ω maximum loop resistance

Terminals:

Minimum conductor size ......................................................................................... No. 28 AWG (0.5 mm

Maximum conductor size......................................................................................... No. 12 AWG (3.0 mm

2

2

Maximum voltage ................................................................................................................................ 300 V

Maximum current.............................................................................................................................. 10 amps

Mechanical

Unit dimensions ........................................ 4.00 H × 10.5 W × 1.250 D inches (101.6 × 266.7 × 31.75 mm)

Unit weight ....................................................................................................................... 1.00 lb. maximum

Environmental

Temperature range (operating/storage).................................................. −30° C to 70° C (−22° F to 158° F)

Humidity .......................................................................................... 95% non-condensing relative humidity

Approval

CE Mark

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