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ISaGRAF Rack Mount Controller with 512K flash, 512K SRAM, and optional 10BaseT Ethernet Port. Available in 4 & 8 slot configurations  (8 x slot: 512K / 512K) with MiniOS7

I-8437 (4 x slot: 512K / 512K + 10BaseT Ethernet)

ISaGRAF Rack Mount Controller with 512K flash, 512K SRAM, and optional 10BaseT Ethernet Port. Available in 4 & 8 slot configurations (8 x slot: 512K / 512K) with MiniOS7

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*** The I-8437 has been phased out and replaced by the I-8437-80 which has a faster processor ***

The I-8xx7 family of ISaGRAF controllers offers a powerful and modular solution, for PLC consumers. The I-8xx7 takes full advantage of ICS Triplex’s ISaGRAF IEC-61131 compatible software, to deliver the ultimate in flexible and easy to use program development.  The I-8xx7 is an excellent solution for users looking to implement a powerful localized, Ethernet based, rack mounted control / data acquisition solution. I-8xx7 features include:

  • ISaGRAF 3.x target runtime
  • Ethernet based control
  • IEC-61131 compatibility
  • Localized, high speed paralell backplane
  • Equipped with MiniOS7 (ROM-DOS like OS)
  • Supports IPv4.
  • Provides full C library functions for:
    • I-8000 I-87K I/O
    • 7-segment LED display
    • RTC (real time clock)
    • EEPROM
    • and more!
  • Firmware can be updated via the RS-232 port
  • XServer architecture greatly simplifies programming of TCP/IP protocol
  • Supports "VxComm" capabilities for all COM ports (RS-232 and Ethernet)
  • Provides a hardware serial number or an ASICKey to protect designated systems.
  • Compact I/O Expansion slots allow quick installation of I/O modules
  • Built-in watchdog circuit
  • Dual Bus designed to support I-8000 & I-87K series I/O modules
  • ModBus TCP & RTU (via internal pass through)


Power Supply
Power reverse polarity protection
Input Range
10 ~ 30 VDC
Power Consumption
20 W (when I/O slots are empty
Operating Temerature
-25°C ~ +75°C (-13°F ~ +167°F)
Storage Temperature -30°C ~ +80°C (-22°F ~ +176°F)
5 ~ 90% (non-condensing)
80188, 40 MHz, or compatible
Watchdog Timer
Provide second, minute, hour, date, day of week, month, year
512 KB
FLASH Memory
512 KB, Erase unit is 64K byes, 100,000 erase/write cycles
NVRAM 31 bytes, battery backup, data valid up to 10 years
EEPROM 2048 bytes, retention > 100 years. 1,000,000 erase/write cycles
SMMI 5-Digit, 7-Seg. LED, four push buttons & three LED on the front panel. It can display message, value, simulate input & output
I/O Slots 4 empty slots for I-8417, 8 empty slots for I-8817. Accept parallel & serial I/O boards
8-pin DIP switch to set NET ID as 1 ~ 255
Serial Ports
RS-232: TxD, RxD, GND, Speed: 115,200 bps max. Programs download port
RS-485: D+, D-, 115,200 bps max. Self-tuner ASIC inside, Programs download port
Can be configured as RS-232 or RS0485, Speed: 115,200 bps max. RS-232: TxD, RxD, RTS, CTS, GND, RS-485: Data+, Data-
RS-232: Full moderm signals, 115,200 bps max. TxD, RxD, RTS, CTS, DSR, DTR, CD, RI, GND
Development Software
ISaGRAF Version 3
IEC61131-3 standard. Language: LD, ST, FBD, SFC, IL & FC
Max. Code Size
I-8417/8817 accepts max. 64 KB ISaGRAF code size (Appli. x8m must < 64 KB)
Motion Control
Can integrate with one I-8091 (2-axis) or two I-8091 (4-axis) to do motion control. (Please update to motion driver to support it.)
PWM Output
Pusle Width Modulation Output
8-ch max. for one controller. 500 Hz max. for Off=1 & On=1 ms, Output square wave: Off: 1 ~ 32767 ms, On: 1 ~ 32767 ms, Optional DO boards: I-8037, 8041, 8042, 8054, 8055, 8056, 8057, 8060, 8063, 8064, 8065, 8066, 8068, 8069. (Relay Output boards cannot generate fast square wave)
Parallel DI Counter
8-ch. max. for 1 controller. Counter value: 32-bit, 500Hz max. Min. pusle width > 1 ms Optional DI boards: I-8040, 8042, 8051, 8052, 8053, 8054, 8055, 8058, 8063, 8077
Serial DI Counter
Counter input: 100 Hz max. Counter value: - to 65,535 (16 bit). Optional serial I-87K D/I boards: I-87K D/I boards: I-87051, 87052, 87053, 87054, 87055, 87058, 87063
Remote DI Counter
All remote I-7000 & I-87K DI modules support counters. 100 Hz max. value: 0 to 65,5535
High Speed Counter
I-87082: 100 kHz max. 32 bit; I-8080: 450 kHz max. 32 bit
Modbus Slave Protocol COM1 & COM2 default supoort Modbus RTU Slave protocol for connecting ISaGRAF, PC/HMI/OPC Server & MMI panels.
Modbus Master Protocol Up to 2 COM ports (COM1, 3, 4, or COM5 if multi-serial port boards are plugged) support Modbus master protocol to connect to other Modbus slave devices
Remote I/O One of COM3 or COM4 supports I-7000 I/O modules & (I-87K base + I-87K serial I/O boards or RU-87P1/2/4/8 + I-87K High Profile I/O cards) as Remote I/O. Max 64 Remote I/O modules for one controller.
Fbus Built-in COM3 Port to exchange data between ICP DAS USA's ISaGRAF PACs
SMS: Short Message Service
One of COM4 of COM5 can link to a GSM modem to support SMS. User can request data/controller by cellular phone. The controller can also send data & alarms to user's cellular phone. Optional GSM modems: GTM-201-RS-232 (850/900/1800/1900 GSM/GPRS External Modem).
User-defined Protocol
Can write custom made protocols applied at COM1, 3, 4 (& COM5 ~ 10 if multi-serial port boards are plugged) by serial commuincation function blocks
Modem Link Supports PC remotely download & monitor the controller through a normal modem
MMICON / LCD One of COM3 or COM4 supports ICP DAS USA's MMICON. The MMICON is featured with a 240 x 65 dot LCD and a 4 x 4 Keyboard. user can use it to display picture, string, integer, float, and input a character, string, integer and float.
Redundant Bus7000 Two ISaGRAF contollers can link to remote I-7000 & I-87K I/O modules at the same time. Only one controller is active to control these remote I/Os. If one is dead, teh other one will take over the control of remote I/Os.
Battery Backup SRAM Supports up to 1024 retain variables with a S256/S512 plug in the socket of the back-plane. Data can also be stored in the S256/S512, and then PC can load these data via COM1 or Optional: S256: 256 KB, S512: 512 KB

References and Support

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