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Home > Products > GE Mark VIe Controller >
GE IS420YDOAS1B Relay Contact Output Interface

GE IS420YDOAS1B Relay Contact Output Interface

GE IS420YDOAS1B

IS420YDOAS1B MARK VIeS

IS420YDOAS1B SAFETY CONTROL

Place of Origin:

USA

Brand Name:

General Electric

Model Number:

IS420YDOAS1B

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GE IS420YDOAS1B Relay Contact Output Interface GE IS420YDOAS1B Relay Contact Output Interface GE IS420YDOAS1B Relay Contact Output Interface
Product Details
Highlight:

GE IS420YDOAS1B

,

IS420YDOAS1B MARK VIeS

,

IS420YDOAS1B SAFETY CONTROL

Payment & Shipping Terms
Minimum Order Quantity
1
Packaging Details
Brand new and original
Delivery Time
2-3 work days
Payment Terms
T/T
Supply Ability
in Stock
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Product Description
GE / MARK VIeS / SAFETY CONTROL
DISCRETE OUTPUT I/O PACK
IS420YDOAS1B
Relay Contact Output Interface
MODULE CLASS
YDOA
12 DO architecture

01 / MARK VIeS 02 / 12 DISCRETE OUTPUTS 03 / SIMPLEX OR TMR 04 / RELAY CONTACTS


01 / MODULE ROLE
The Output Link Between Logic and Field Devices
IS420YDOAS1B is the discrete output I/O Pack used in the Mark VIeS relay contact output module. It interfaces Mark VIeS Safety control logic with discrete process actuators through a compatible relay output terminal board.
SYSTEM FUNCTION
12 DO
Relay output architecture for discrete process control.
02 / CONTROL ARCHITECTURE
A Two-Part Output Module
▦
YDOA I/O Pack
IS420YDOAS1B
 ›
▤
Relay Terminal Board
SRLY / TRLY
 ›
◉
Field Actuators
Discrete devices
The complete relay contact output module consists of two orderable parts: the discrete output I/O Pack and the relay contact output terminal board. Terminal board selection determines contact arrangement, wiring and redundancy configuration.
03 / HARDWARE SPECIFICATIONS
IS420YDOAS1B at a Glance
Item Specification
Manufacturer GE
Part number IS420YDOAS1B
Product type Discrete output I/O Pack
Platform Mark VIeS Functional Safety System
Output architecture 12 discrete relay output channels
I/O Pack control power 24 / 28 V DC, 19.8 W max.
Power connector Micro Mate-N-Lok receptacle, AMP 1445022-3
Construction Aluminum case
Health indication Visual status LEDs and circuit health variables
Operating temperature -40 to 70°C (terminal module specification)
The control power and operating temperature are stated for the Mark VIeS relay output module configuration.
04 / TERMINAL BOARD CONFIGURATION
Choose the Correct Relay Arrangement
SIMPLEX
IS410SRLYS2A
12 Form-C relay output circuits through 48 customer terminals. One YDOA I/O Pack is used.
12 DO · Form-C
SIMPLEX / TMR
IS410TRLYS1B
Relay output with coil sensing and integrity feedback. One or three YDOA packs depending on configuration.
12 DO · Form-C
SOLENOID INTEGRITY
IS410TRLYS1D
Six normally open relay outputs with load integrity monitoring.
6 NO · Solenoid sensing
TMR CONTACT VOTING
IS410TRLYS1F / S2F
TMR voted contacts: 12 NO Form-A or 12 NC Form-B, depending on board variant.
3 YDOA packs · TMR
The I/O Pack is ordered separately from its terminal board. Confirm the terminal board suffix and redundancy arrangement before replacement.
05 / CONTACT RATINGS
Ratings Depend on the Terminal Board
Terminal board Contact rating
IS410SRLYS2A 0.6 A at 125 V DC; 1.2 A at 48 V DC; 2.25 A at 24 V DC; 2.25 A at 120 / 240 V AC
IS410TRLYS1B 0.6 A at 125 V DC; 1.2 A at 48 V DC; 8 A at 24 V DC; 3 A at 120 / 240 V AC
IS410TRLYS1D 0.5 A at 125 V DC; 2.25 A at 24 V DC
IS410TRLYS1F / S2F 2.25 A at 24 V DC
These are terminal-board contact ratings, not a universal standalone rating for IS420YDOAS1B.
06 / DIAGNOSTICS & SYSTEM HEALTH
Output Status Beyond the Command
◉
Power-up Self Test
Checks the I/O Pack during system startup.
▥
Pack Health
Visual status LEDs and health variables available to control logic.
⇄
Command / Feedback Check
Relay output feedback can be checked against the commanded state on compatible configurations.
⌁
Fuse & Wetting Diagnostics
Detection functions depend on the selected terminal board and daughterboard arrangement.
07 / FAQ
Questions Before Ordering
Q1. Can IS420YDOAS1B be used with both SRLY and TRLY terminal boards?
A. Yes. The Mark VIeS relay contact output architecture uses the same YDOA I/O Pack with compatible SRLY and TRLY terminal board options. The board selection determines the output contact arrangement, redundancy and field wiring configuration.
Q2. Why might an IS420YDOAS1B replacement require three I/O Packs instead of one?
A. The quantity depends on the selected terminal board and system redundancy. Simplex configurations use one pack, while TMR configurations can use three packs. Some terminal board variants specify three packs for TMR contact voting.
Q3. Does IS420YDOAS1B provide the same relay contact rating with every terminal board?
A. No. Contact ratings vary by terminal board. For example, SRLYS2A and TRLYS1B have different DC and AC ratings, while TRLYS1D and the TMR voted-contact versions have their own limits. Verify the exact board part number and load before connecting field devices.
Q4. What does the solenoid integrity feature mean when IS420YDOAS1B is installed on IS410TRLYS1D?
A. The TRLYS1D arrangement supports solenoid integrity sensing. It measures solenoid resistance to help detect open- and short-circuit conditions. This is a terminal-board configuration feature, not a general capability to assume for every YDOA installation.
Q5. What should be checked if IS420YDOAS1B reports healthy but the commanded field output is incorrect?
A. Check the output command, terminal board compatibility, relay feedback, field wiring, contact wetting supply and fuse arrangement where fitted. A healthy I/O Pack indication does not by itself confirm that the external field circuit is operating correctly.
GE IS420YDOAS1B / ENQUIRY
Match the Pack to Your System
Send the terminal board number, I/O Pack revision, redundancy type and quantity for a replacement enquiry.
↗
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Sales Manager: Miya Zheng
sales@amikon.cn   |   +86 180 2077 6792
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