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: 610-796-5954
V
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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