This page describes the IBM SMS card "ZKV", and is part of the SMS card database.

Function of the card:
ETM Delay Circuit

Listed in 1401 SMS card usage
One Shot controlled Reed Relay (0.4 sec retriggerable)

Part number: 372687

Used in: IBM 1401, IBM 7090

Symbol:O-SS/R

IBM SMS card type ZKV 372687 IBM SMS card type ZKV 372687

Pinout:

A I1
B T1
C R1-2A
D R1-1A
E PD
F R1-1AR
G R1-1B
H R1-2B
J GND
K
L
M -12V
N
P CAP
Q DC
R
References: 2_2 SMS Cards, p152
Coslet data
National Museum of Computing.

This page created by Ken Shirriff on Wed Sep 15 18:15:10 2021.

The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.